Appunti del corso di dottorato:
INTRODUZIONE ALL'OTTIMIZZAZIONE STRUTTURALE
IIa parte
Lezione del 28 maggio 2014
Lecture of the Ph.D. Course on
STRUCTURAL OPTIMIZATION
2nd part
May, 28, 2014
Appunti del corso di dottorato:
INTRODUZIONE ALL'OTTIMIZZAZIONE STRUTTURALE
Ia parte
Lezione del 28 maggio 2014
Lecture of the Ph.D. Course on STRUCTURAL OPTIMIZATION
May, 28, 2014
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from CSI ETABS & SAFE with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2.The process of designing elements will not be revolutionised as a result of using Eurocode 2. Due to time constraints and knowledge, I may not be able to address the whole issues.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from ETABS with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2. The process of designing elements will not be revolutionised as a result of using Eurocode 2.
Appunti del corso di dottorato:
INTRODUZIONE ALL'OTTIMIZZAZIONE STRUTTURALE
Ia parte
Lezione del 28 maggio 2014
Lecture of the Ph.D. Course on STRUCTURAL OPTIMIZATION
May, 28, 2014
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from CSI ETABS & SAFE with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2.The process of designing elements will not be revolutionised as a result of using Eurocode 2. Due to time constraints and knowledge, I may not be able to address the whole issues.
This document presents an example of analysis design of slab using ETABS. This example examines a simple single story building, which is regular in plan and elevation. It is examining and compares the calculated ultimate moment from ETABS with hand calculation. Moment coefficients were used to calculate the ultimate moment. However it is good practice that such hand analysis methods are used to verify the output of more sophisticated methods.
Also, this document contains simple procedure (step-by-step) of how to design solid slab according to Eurocode 2. The process of designing elements will not be revolutionised as a result of using Eurocode 2.
Flow-induced energy harvesting: conceptual design and numerical analyses of ...StroNGER2012
This study focuses on the conceptual design and the numerical analysis of an Energy Harvesting (EH) device, based on piezoelectric materials, for the sustainability of smart buildings. Before that, a comprehensive literature review on the topic takes place. The device consists in an aerodynamic fin attached to a piezoelectric element that makes use of the airflow to harvest energy. The principal utilization of this device is for energy autonomous sensors, with applications in smart buildings. A performance-based parametric analysis is conducted (in ANSYS®) in order to assess the optimal values of some design and operating condition parameters, including length, width, thickness, constitutive material of the bender and velocity and turbulence intensity of the incoming airflow. The response parameters used for evaluating the performances include the bender maximum tip displacement, the bender vibration frequency, and the rms of the voltage generated by the device. Considerations are made on possible applications in other sectors (structures and transportations infrastructures).
At StroNGER S.r.l. (a SME in Rome-ITALY), we are planning our participation in Horizon 2020.
We are mostly interested in the following forthcoming calls
- MG.8.1-2014: Smarter design, construction and maintenance
- MG.8.2-2014: Next generation transport infrastructure: resource efficient, smarter and safer
- MG.8.4-2015: Smart governance, network resilience and streamlined delivery of infrastructure innovation
- DRS-7-2014: Crisis management topic 7: Crises and disaster resilience – operationalizing resilience concepts
- DRS-11-2015: Disaster Resilience & Climate Change topic 3: Mitigating the impacts of climate change and natural hazards on cultural heritage sites, structures and artefacts
- DRS-13-2015: Critical Infrastructure Protection topic 2: Demonstration activity on tools for adapting building and infrastructure standards and design methodologies in vulnerable locations in case of natural or man-originated catastrophes
- DRS-14-2015: Critical Infrastructure Protection topic 3: Critical Infrastructure resilience indicator - analysis and development of methods for assessing resilience
- DRS-17-2014/2015: Critical infrastructure protection topic 7: SME instrument topic: “Protection of urban soft targets and urban critical infrastructures”
We can contribute in the following specific subjects:
- Design and rehabilitation of civil structures and infrastructures with regard to wind, earthquakes, waves, landslides, fire and explosions.
- Disaster resilience assessment.
- Advanced numerical modeling of civil structures and infrastructures.
- Forensic engineering.
- Sustainability and Energy Harvesting in Civil structures and infrastructures.
If you are forming a consortium and would like to involve a group with the above skills and expertise, please get in touch with us!
L’investigazione antincendio sugli aspetti strutturali: una proposta di codificaStroNGER2012
I numerosi incendi che si innescano e danneggiano
le strutture hanno rivoluzionato, da una parte,
molte procedure sulla prevenzione definendo metodologie
gestionali più efficaci e stanno, dall’altra,
portando ad affinare procedure investigative
codificate atte a ridurre il rischio di errori/omissioni
durante le indagini.
Lo scopo di questo articolo è quello di esporre
una metodologia codificata di Structural Fire Investigation
(Investigazione sugli aspetti strutturali in
caso di incendio) atta ad individuare le cause scatenanti,
pregresse e latenti, che hanno determinato
l’evento accidentale.
L’iter investigativo, associato a determinate operazioni
strutturali e forensi che partono dalla raccolta
delle informazioni iniziali al repertamento e
controllo documentale per poi completarsi con le
verifiche computazionali, sicuramente aiuta a determinare,
in maniera rigorosa, le cause e l’origine
di un incendio. La modellazione degli incendi con
il software del NIST, Fire Dynamics Simulator
(FDS) e l’analisi strutturale con vari codici di calcolo,
permettono di verificare determinate ipotesi
maturate durante il repertamento e di avvalorare
scientificamente l’analisi semiotica rilevata sulla
scena, fornendo dati forensi utili in fase dibattimentale.
Quindi un’attività investigativa pianificata, permette
a qualsiasi utente, (VV.F., personale delle Forze
dell’Ordine, Consulente, Perito, CTU o Libero
Professionista), di svolgere indagini in maniera appropriata
secondo una linea guida che permette
di non tralasciare controlli a volte rilevanti per la
stesura della documentazione complessiva in forma
di report finale.
SISTEMILA RETE STRADALE URBANA:UN’EMERGENZA DEL QUOTIDIANO O UN’OPPORTUNITA’ ...StroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
Villa di Silin. Aspetti progettuali dell’intervento di restauro.StroNGER2012
Salone dell'Arte del Restauro e della Conservazione dei Beni Culturali e Ambientali,
Ferrara, marzo 2014.
La presentazione svolta illustra i principali aspetti relativi alla progettazione strutturale del supporto di una parte dei mosaici di Villa Silin presso Leptis Magna.
The aim of this investigation is the identification of a solution for the replacement of the concrete screed that supports part of the Roman mosaic outside Villa Silin located very close to the archaeological city of Leptis Magna in Libya, facing the Mediterranean Sea.
29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
VALUTAZIONI CRITICHE DEI MODELLI NUMERICI E DEI RISULTATIStroNGER2012
Lezione di Chiara Crosti
ANALISI STRUTTURALE DI PONTI E DI OPERE COMPLESSE DI INGEGNERIA CIVILI
Roma 10 ottobre 2014,
Facoltà di Ingegneria Civile ed Industriale
Sapienza - Università di Roma
Via Eudossiana, 18 Roma
PBWE - IN VENTO 2014 - Petrini StroNGER.comStroNGER2012
Building occupants’ comfort assessment in the PBWE framework.
by
Francesco Petrini, Pierluigi Olmati and Franco Bontempi.
This research deals with the problem of the comfort assessment of high-rise building occupants under wind action. Also if the problem has been studied by there searchers and by the civil engineering industry during last thirty years, appropriate methods to handling the design of high-rise buildings in order to avoid wind-induced
occupant discomfort has not been defined yet, mainly due to the high uncertainties involved in the determination of both the demand and the sensitivity of the building occupants to wind-induced vibrations. The main issues related with this problem are first summarized, then the growing, pioneering performance-based wind engineering (PBWE) approach is proposed as tool to handle the problem. The required analyses are presented and discussed on both the conceptual and operational point of view. A case-study is then presented in order to demonstrate the effectiveness of the proposed approach. In the PBWE view, the contribution of the work is focused on the procedural step identified as “damage analysis”, something that, in authors’ knowledge,has not been yet developed in the literature.
Strutture temporanee arangio ottobre 2014 sapienzaStroNGER2012
Lezione di Franco Bontempi
LA STATICA DEGLI ALLESTIMENTI TEMPORANEI PER EVENTI Quadro normativo e verifiche di sicurezza.
Venerdì 10 ottobre 2014,
Aula del Chiostro, Facoltà di Ingegneria Civile e Industriale,
Sapienza Università di Roma
Seismic assessment of historical masonry buildings with nonlinear static anal...StroNGER2012
Bucchi F., Arangio S., Bontempi F., “Seismic assessment of historical masonry buildings with nonlinear static analysis”, The Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 3-6 September 2013, Cagliari, Sardinia, Italy
Design Knowledge Gain by Structural Health MonitoringStroNGER2012
The design of complex structures should be based on advanced approaches able to take into account the behavior of the constructions during their entire life-cycle. Moreover, an effective design method should consider that the modern constructions are usually complex systems, characterized by strong interactions among the single components and with the design environment.
A modern approach, capable of adequately considering these issues, is the so-called performance-based design (PBD). In order to profitably apply this design philosophy, an effective framework for the evaluation of the overall quality of the structure is needed; for this purpose, the concept of dependability can be effectively applied.
In this context, structural health monitoring (SHM)
assumes the essential role to improve the knowledge on the structural system and to allow reliable evaluations of the structural safety in operational conditions. SHM should be planned at the design phase and should be performed during the entire life-cycle of the structure.
In order to deal with the large quantity of data coming from the continuous monitoring various processing techniques exist. In this work different approaches are discussed and in the last part two of them are applied on the same dataset.
It is interesting to notice that, in addition to this first level of knowledge, structural health monitoring allows obtaining a further more general contribution to the design knowledge of the whole sector of structural engineering.
Consequently, SHM leads to two levels of design knowledge gain: locally, on the specific structure, and globally, on the general class of similar structures.
Parte C delle lezioni del
Corso di Dottorato sull'OTTIMIZZAZIONE STRUTTURALE
Prof. Ing. Franco Bontempi
Aprile - Maggio 2015,
Facolta' di Ingegneria Civile e Industriale
Universita' degli Studi di Roma La Sapienza
Flow-induced energy harvesting: conceptual design and numerical analyses of ...StroNGER2012
This study focuses on the conceptual design and the numerical analysis of an Energy Harvesting (EH) device, based on piezoelectric materials, for the sustainability of smart buildings. Before that, a comprehensive literature review on the topic takes place. The device consists in an aerodynamic fin attached to a piezoelectric element that makes use of the airflow to harvest energy. The principal utilization of this device is for energy autonomous sensors, with applications in smart buildings. A performance-based parametric analysis is conducted (in ANSYS®) in order to assess the optimal values of some design and operating condition parameters, including length, width, thickness, constitutive material of the bender and velocity and turbulence intensity of the incoming airflow. The response parameters used for evaluating the performances include the bender maximum tip displacement, the bender vibration frequency, and the rms of the voltage generated by the device. Considerations are made on possible applications in other sectors (structures and transportations infrastructures).
At StroNGER S.r.l. (a SME in Rome-ITALY), we are planning our participation in Horizon 2020.
We are mostly interested in the following forthcoming calls
- MG.8.1-2014: Smarter design, construction and maintenance
- MG.8.2-2014: Next generation transport infrastructure: resource efficient, smarter and safer
- MG.8.4-2015: Smart governance, network resilience and streamlined delivery of infrastructure innovation
- DRS-7-2014: Crisis management topic 7: Crises and disaster resilience – operationalizing resilience concepts
- DRS-11-2015: Disaster Resilience & Climate Change topic 3: Mitigating the impacts of climate change and natural hazards on cultural heritage sites, structures and artefacts
- DRS-13-2015: Critical Infrastructure Protection topic 2: Demonstration activity on tools for adapting building and infrastructure standards and design methodologies in vulnerable locations in case of natural or man-originated catastrophes
- DRS-14-2015: Critical Infrastructure Protection topic 3: Critical Infrastructure resilience indicator - analysis and development of methods for assessing resilience
- DRS-17-2014/2015: Critical infrastructure protection topic 7: SME instrument topic: “Protection of urban soft targets and urban critical infrastructures”
We can contribute in the following specific subjects:
- Design and rehabilitation of civil structures and infrastructures with regard to wind, earthquakes, waves, landslides, fire and explosions.
- Disaster resilience assessment.
- Advanced numerical modeling of civil structures and infrastructures.
- Forensic engineering.
- Sustainability and Energy Harvesting in Civil structures and infrastructures.
If you are forming a consortium and would like to involve a group with the above skills and expertise, please get in touch with us!
L’investigazione antincendio sugli aspetti strutturali: una proposta di codificaStroNGER2012
I numerosi incendi che si innescano e danneggiano
le strutture hanno rivoluzionato, da una parte,
molte procedure sulla prevenzione definendo metodologie
gestionali più efficaci e stanno, dall’altra,
portando ad affinare procedure investigative
codificate atte a ridurre il rischio di errori/omissioni
durante le indagini.
Lo scopo di questo articolo è quello di esporre
una metodologia codificata di Structural Fire Investigation
(Investigazione sugli aspetti strutturali in
caso di incendio) atta ad individuare le cause scatenanti,
pregresse e latenti, che hanno determinato
l’evento accidentale.
L’iter investigativo, associato a determinate operazioni
strutturali e forensi che partono dalla raccolta
delle informazioni iniziali al repertamento e
controllo documentale per poi completarsi con le
verifiche computazionali, sicuramente aiuta a determinare,
in maniera rigorosa, le cause e l’origine
di un incendio. La modellazione degli incendi con
il software del NIST, Fire Dynamics Simulator
(FDS) e l’analisi strutturale con vari codici di calcolo,
permettono di verificare determinate ipotesi
maturate durante il repertamento e di avvalorare
scientificamente l’analisi semiotica rilevata sulla
scena, fornendo dati forensi utili in fase dibattimentale.
Quindi un’attività investigativa pianificata, permette
a qualsiasi utente, (VV.F., personale delle Forze
dell’Ordine, Consulente, Perito, CTU o Libero
Professionista), di svolgere indagini in maniera appropriata
secondo una linea guida che permette
di non tralasciare controlli a volte rilevanti per la
stesura della documentazione complessiva in forma
di report finale.
SISTEMILA RETE STRADALE URBANA:UN’EMERGENZA DEL QUOTIDIANO O UN’OPPORTUNITA’ ...StroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
Villa di Silin. Aspetti progettuali dell’intervento di restauro.StroNGER2012
Salone dell'Arte del Restauro e della Conservazione dei Beni Culturali e Ambientali,
Ferrara, marzo 2014.
La presentazione svolta illustra i principali aspetti relativi alla progettazione strutturale del supporto di una parte dei mosaici di Villa Silin presso Leptis Magna.
The aim of this investigation is the identification of a solution for the replacement of the concrete screed that supports part of the Roman mosaic outside Villa Silin located very close to the archaeological city of Leptis Magna in Libya, facing the Mediterranean Sea.
29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
VALUTAZIONI CRITICHE DEI MODELLI NUMERICI E DEI RISULTATIStroNGER2012
Lezione di Chiara Crosti
ANALISI STRUTTURALE DI PONTI E DI OPERE COMPLESSE DI INGEGNERIA CIVILI
Roma 10 ottobre 2014,
Facoltà di Ingegneria Civile ed Industriale
Sapienza - Università di Roma
Via Eudossiana, 18 Roma
PBWE - IN VENTO 2014 - Petrini StroNGER.comStroNGER2012
Building occupants’ comfort assessment in the PBWE framework.
by
Francesco Petrini, Pierluigi Olmati and Franco Bontempi.
This research deals with the problem of the comfort assessment of high-rise building occupants under wind action. Also if the problem has been studied by there searchers and by the civil engineering industry during last thirty years, appropriate methods to handling the design of high-rise buildings in order to avoid wind-induced
occupant discomfort has not been defined yet, mainly due to the high uncertainties involved in the determination of both the demand and the sensitivity of the building occupants to wind-induced vibrations. The main issues related with this problem are first summarized, then the growing, pioneering performance-based wind engineering (PBWE) approach is proposed as tool to handle the problem. The required analyses are presented and discussed on both the conceptual and operational point of view. A case-study is then presented in order to demonstrate the effectiveness of the proposed approach. In the PBWE view, the contribution of the work is focused on the procedural step identified as “damage analysis”, something that, in authors’ knowledge,has not been yet developed in the literature.
Strutture temporanee arangio ottobre 2014 sapienzaStroNGER2012
Lezione di Franco Bontempi
LA STATICA DEGLI ALLESTIMENTI TEMPORANEI PER EVENTI Quadro normativo e verifiche di sicurezza.
Venerdì 10 ottobre 2014,
Aula del Chiostro, Facoltà di Ingegneria Civile e Industriale,
Sapienza Università di Roma
Seismic assessment of historical masonry buildings with nonlinear static anal...StroNGER2012
Bucchi F., Arangio S., Bontempi F., “Seismic assessment of historical masonry buildings with nonlinear static analysis”, The Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing, 3-6 September 2013, Cagliari, Sardinia, Italy
Design Knowledge Gain by Structural Health MonitoringStroNGER2012
The design of complex structures should be based on advanced approaches able to take into account the behavior of the constructions during their entire life-cycle. Moreover, an effective design method should consider that the modern constructions are usually complex systems, characterized by strong interactions among the single components and with the design environment.
A modern approach, capable of adequately considering these issues, is the so-called performance-based design (PBD). In order to profitably apply this design philosophy, an effective framework for the evaluation of the overall quality of the structure is needed; for this purpose, the concept of dependability can be effectively applied.
In this context, structural health monitoring (SHM)
assumes the essential role to improve the knowledge on the structural system and to allow reliable evaluations of the structural safety in operational conditions. SHM should be planned at the design phase and should be performed during the entire life-cycle of the structure.
In order to deal with the large quantity of data coming from the continuous monitoring various processing techniques exist. In this work different approaches are discussed and in the last part two of them are applied on the same dataset.
It is interesting to notice that, in addition to this first level of knowledge, structural health monitoring allows obtaining a further more general contribution to the design knowledge of the whole sector of structural engineering.
Consequently, SHM leads to two levels of design knowledge gain: locally, on the specific structure, and globally, on the general class of similar structures.
Parte C delle lezioni del
Corso di Dottorato sull'OTTIMIZZAZIONE STRUTTURALE
Prof. Ing. Franco Bontempi
Aprile - Maggio 2015,
Facolta' di Ingegneria Civile e Industriale
Universita' degli Studi di Roma La Sapienza
Optimization of prestressed concrete girdereSAT Journals
Abstract Bridge construction today has achieved a worldwide level of importance. Bridges are the key elements in any road network Use of prestressed concrete I girder bridge is gaining popularity in bridge engineering fraternity because of its better stability, serviceability, economy, aesthetic appearance and structural efficiency. This paper concerned idea about prestressed concrete.In the method of prestressing two types are consider that pre tensioning and post tensioning .At the time of prestressing different losses are consider. These are the losses due to elastic shortening, friction losses, relaxation losses, losses due to creep and shrinkage. In this way total amount of losses in pretensioning and post tensioning calculate and detailed information has given in this report. The objective is to minimize the total cost in the design process of the bridge system considering the cost of materials like steel, concrete, tendons etc. For a particular problem the design variables considered for the cost minimization of the bridge system, are depth of girder, various cross sectional dimensions of the girder, number of tendons, A programme is developed for analysis and designing an low cost prestressed girder in MATLAB R2010a software. The optimtool is used to find out minimum cost of structure Illustrative case of prestressed girder presented and discuss by using active set method from optimtool. Optimization problem is characterized by considering design variables and bound constraints are according to AASHTOO Standards ,IRC 21-2000 bridge specifications .The proposed cost optimization approach is compared with an existing project which leads to a considerable cost saving while resulting in feasible design. Keywords: Post tension I girder, Conventional design, Optimal design, MATLAB Software etc…
Corso di dottorato & Corso di formazione StroNGER2012
Basi di OTTIMIZZAZIONE STRUTTURALE, 6 luglio 2016 (totale di 8 ore)
&
LA PROGETTAZIONE STRUTTURALE ATTRAVERSO L’ANALISI DI CASI CRITICI, 7 e 8 luglio (totale di 16 ore)
I Restauri e la Città: l’esempio del Colosseo e della Casa di AugustoStroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
INFRASTRUTTURE IN AMBITO URBANO: COMPLESSITA’ DI PROGETTO E DURABILITA’StroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
61Resilienza dei centri urbani e rilievo delle costruzioni: un binomio indivi...StroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
Roma e le sue acque:il punto di vista della Protezione CivileStroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
Una visione ampia dei sistemi: robustezza e resilienza.StroNGER2012
GLI ATTORI DEL DIVENIRE URBANO
Facoltà di Ingegneria
Sapienza Università di Roma
Sala del Chiostro 26 NOVEMBRE 2015
a cura di
Alessandro Cutini - Franco Bontempi
29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
29 May 2015 - Rome
Research Meeting with
University of Brasilia–Brazil
University of Nebraska-Lincoln (Omaha Campus)
University of Rome La Sapienza
StroNGER
Uso delle fibre di basalto nel risanamento degli edifici storiciStroNGER2012
Intervento di Stefania Arangio a:
Miglioramento e adeguamento sismico di strutture esistenti attraverso l'utilizzo di materiali compisiti in FRP
Ordine degli Ingegneri della Provincia di Roma
14 aprile 2015
IDENTIFICAZIONE STRUTTURALE DEL COMPORTAMENTO SPERIMENTALE DI CENTINE INNOVAT...StroNGER2012
Contributo a IF CRASC'15 di Alessandra Castelli e Francesco Petrini.
14-16 maggio 2015.
Universita' degli Studi di Roma La Sapienza
Facolta' di Ingegneria Civile e Industriale
ifcrasc15@stronger2012.com
Corso Ottimizzazione Strutturale Sapienza 2015StroNGER2012
Il corso vuole introdurre in maniera semplice i concetti, i metodi, gli strumenti necessari all’ottimizzazione di una struttura in termini di capacità prestazionali e sicurezza. L’attenzione è focalizzata sulle idee e sulle applicazioni, nella convinzione che gran parte dei dettagli algoritmici, seppure fondamentali nelle applicazioni più sofisticate, possano essere rimandati a successivi approfondimenti: questo anche alla luce degli strumenti computazionali moderni che permettono di concentrarsi sulla progettazione concettuale dei sistemi strutturali nelle forme più attuali. Gli studenti potranno quindi essere capaci di impostare e comprendere i processi ideativi alla base delle moderne forme strutturali che si presentano per le coperture, i ponti e gli edifici alti.
MIGLIORAMENTO ED ADEGUAMENTO SISMICO DI STRUTTURE ESISTENTI ATTRAVERSO L’UTIL...StroNGER2012
MIGLIORAMENTO ED ADEGUAMENTO SISMICO DI STRUTTURE ESISTENTI ATTRAVERSO L’UTILIZZO DI MATERIALI COMPOSITI IN FRP.
14 e 21 Aprile 2015.
https://www.ording.roma.it/seminario.aspx?id=14727
2° WORKSHOP GRUPPO ITALIANO IABMAS - IABMAS ITALIAN GROUPStroNGER2012
Negli ultimi anni un crescente sviluppo di studi e ricerche ha consentito significativi progressi nell’ambito della modellazione, analisi, progettazione, monitoraggio, manutenzione e riparazione di ponti, viadotti e infrastrutture. Nell’ambito della comunità scientifica e del mondo professionale questi sviluppi sono percepiti come centrali per l’ingegneria civile, per la quale si sta attuando una transizione verso una filosofia di progettazione che considera l’intero ciclo di vita, secondo canoni sostenibili tali da consentire la realizzazione di opere intrinsecamente durevoli, robuste e resilienti.
L’Associazione IABMAS – International Association for Bridge Maintenance And Safety – opera in questo ambito dalla sua fondazione nel 1999 e rappresenta la principale organizzazione internazionale nei settori della progettazione, manutenzione e gestione dei ponti, con oltre 1000 membri individuali e 80 membri collettivi da 55 paesi (http://www.iabmas.org).
Per un migliore coordinamento delle sue attività, l’Associazione IABMAS prevede la possibilità di istituire gruppi nazionali che consentono di meglio interpretare e promuovere le competenze e le potenzialità che ciascun paese desidera esprimere nell’ambito dell’Associazione. Oltre all’Italia, i paesi che ospitano i gruppi nazionali IABMAS sono Portogallo, Giappone, Cina e Brasile.
Il Gruppo Italiano IABMAS è stato costituito nel 2012 con l’intento di istituire un riferimento privilegato per studiosi, ricercatori e progettisti in grado di promuovere una fruttuosa sinergia tra teoria e pratica nel settore dei ponti e viadotti, favorendo il dialogo tra comunità accademica, comunità professionale, operatori del mondo delle costruzioni, produttori di materiali avanzati, enti di gestione e amministrazioni di reti infrastrutturali pubbliche e private (http://www.iabmas-italy.it).
Strutture temporanee crosti ottobre 2014 sapienzaStroNGER2012
Lezione di Chiara Crosti
LA STATICA DEGLI ALLESTIMENTI TEMPORANEI PER EVENTI Quadro normativo e verifiche di sicurezza.
Venerdì 10 ottobre 2014,
Aula del Chiostro, Facoltà di Ingegneria Civile e Industriale,
Sapienza Università di Roma
Final project report on grocery store management system..pdfKamal Acharya
In today’s fast-changing business environment, it’s extremely important to be able to respond to client needs in the most effective and timely manner. If your customers wish to see your business online and have instant access to your products or services.
Online Grocery Store is an e-commerce website, which retails various grocery products. This project allows viewing various products available enables registered users to purchase desired products instantly using Paytm, UPI payment processor (Instant Pay) and also can place order by using Cash on Delivery (Pay Later) option. This project provides an easy access to Administrators and Managers to view orders placed using Pay Later and Instant Pay options.
In order to develop an e-commerce website, a number of Technologies must be studied and understood. These include multi-tiered architecture, server and client-side scripting techniques, implementation technologies, programming language (such as PHP, HTML, CSS, JavaScript) and MySQL relational databases. This is a project with the objective to develop a basic website where a consumer is provided with a shopping cart website and also to know about the technologies used to develop such a website.
This document will discuss each of the underlying technologies to create and implement an e- commerce website.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
NUMERICAL SIMULATIONS OF HEAT AND MASS TRANSFER IN CONDENSING HEAT EXCHANGERS...ssuser7dcef0
Power plants release a large amount of water vapor into the
atmosphere through the stack. The flue gas can be a potential
source for obtaining much needed cooling water for a power
plant. If a power plant could recover and reuse a portion of this
moisture, it could reduce its total cooling water intake
requirement. One of the most practical way to recover water
from flue gas is to use a condensing heat exchanger. The power
plant could also recover latent heat due to condensation as well
as sensible heat due to lowering the flue gas exit temperature.
Additionally, harmful acids released from the stack can be
reduced in a condensing heat exchanger by acid condensation. reduced in a condensing heat exchanger by acid condensation.
Condensation of vapors in flue gas is a complicated
phenomenon since heat and mass transfer of water vapor and
various acids simultaneously occur in the presence of noncondensable
gases such as nitrogen and oxygen. Design of a
condenser depends on the knowledge and understanding of the
heat and mass transfer processes. A computer program for
numerical simulations of water (H2O) and sulfuric acid (H2SO4)
condensation in a flue gas condensing heat exchanger was
developed using MATLAB. Governing equations based on
mass and energy balances for the system were derived to
predict variables such as flue gas exit temperature, cooling
water outlet temperature, mole fraction and condensation rates
of water and sulfuric acid vapors. The equations were solved
using an iterative solution technique with calculations of heat
and mass transfer coefficients and physical properties.
NO1 Uk best vashikaran specialist in delhi vashikaran baba near me online vas...Amil Baba Dawood bangali
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An Approach to Detecting Writing Styles Based on Clustering Techniquesambekarshweta25
An Approach to Detecting Writing Styles Based on Clustering Techniques
Authors:
-Devkinandan Jagtap
-Shweta Ambekar
-Harshit Singh
-Nakul Sharma (Assistant Professor)
Institution:
VIIT Pune, India
Abstract:
This paper proposes a system to differentiate between human-generated and AI-generated texts using stylometric analysis. The system analyzes text files and classifies writing styles by employing various clustering algorithms, such as k-means, k-means++, hierarchical, and DBSCAN. The effectiveness of these algorithms is measured using silhouette scores. The system successfully identifies distinct writing styles within documents, demonstrating its potential for plagiarism detection.
Introduction:
Stylometry, the study of linguistic and structural features in texts, is used for tasks like plagiarism detection, genre separation, and author verification. This paper leverages stylometric analysis to identify different writing styles and improve plagiarism detection methods.
Methodology:
The system includes data collection, preprocessing, feature extraction, dimensional reduction, machine learning models for clustering, and performance comparison using silhouette scores. Feature extraction focuses on lexical features, vocabulary richness, and readability scores. The study uses a small dataset of texts from various authors and employs algorithms like k-means, k-means++, hierarchical clustering, and DBSCAN for clustering.
Results:
Experiments show that the system effectively identifies writing styles, with silhouette scores indicating reasonable to strong clustering when k=2. As the number of clusters increases, the silhouette scores decrease, indicating a drop in accuracy. K-means and k-means++ perform similarly, while hierarchical clustering is less optimized.
Conclusion and Future Work:
The system works well for distinguishing writing styles with two clusters but becomes less accurate as the number of clusters increases. Future research could focus on adding more parameters and optimizing the methodology to improve accuracy with higher cluster values. This system can enhance existing plagiarism detection tools, especially in academic settings.
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Understanding Inductive Bias in Machine LearningSUTEJAS
This presentation explores the concept of inductive bias in machine learning. It explains how algorithms come with built-in assumptions and preferences that guide the learning process. You'll learn about the different types of inductive bias and how they can impact the performance and generalizability of machine learning models.
The presentation also covers the positive and negative aspects of inductive bias, along with strategies for mitigating potential drawbacks. We'll explore examples of how bias manifests in algorithms like neural networks and decision trees.
By understanding inductive bias, you can gain valuable insights into how machine learning models work and make informed decisions when building and deploying them.
RAT: Retrieval Augmented Thoughts Elicit Context-Aware Reasoning in Long-Hori...
Corso di dottorato in Ottimizzazione Strutturale: applicazione mensola strallata - Bontempi
1. Franco Bontempi
Ordinario di Tecnca delle Costruzioni
Facolta’ di Ingegneria Civile e Industriale
Sapienza Universita’ di Roma
Introduzione alla
OTTIMIZZAZIONE STRUTTURALE:
APPLICAZIONE AD UNA
MENSOLA STRALLATA
7. 7
CONNECTION REGIONS
• Presence of high stress levels;
• Diffusive field of stress - so-called D-regions;
• Geometrical complexity, related to the position
and interference of different structural parts
converging there;
• Requirements of minimum space usage,
essentially due to architectural appearance;
• Necessity to guarantee a substantial good
structural behavior - strength, ductility, and
robustness;
• Demand from constructability point of view.
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11. 11
BASIS OF DESIGN (1)
• simplicity:
the structural configuration of the connection
must be made by very regular and flat parts,
by which
– the stress state has the most possible uniformity;
– there are no stress concentrations;
– the load transfer is obtained by the most straight
path;
– it is possible to develop a complete integration
between steel parts and concrete mass, with an
accurate structural anchorage.
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12. 12
BASIS OF DESIGN (2)
• dependability:
the structural configuration must be have
– suitable functional performance characteristics
(Serviceability Limit States, SLS),
– appropriate strength capacity
(Ultimate Limit States, ULS),
– capacity to support accidental situations, without
showing disproportionate consequences when
triggered by limited damage
(Structural Robustness).
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20. 20
FIRST ANALYSIS (A):
two dimensional geometry
column
a
Vsd
Vsd
a/2
Vsd*=Vsd/2
Vsd* =Vsd/2
column
a
Vsd
Vsd
column
a
Vsd
Vsd
a/2
Vsd*=Vsd/2
Vsd* =Vsd/2
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21. 21
• the steel parts, the longitudinal bars and the
stirrups are represented by bars working both
in tension and in compression, while concrete
parts are lumped into bars with no tension
behavior;
• one model a segment of concrete column
sufficient to extinguish the diffusive effects
connected with this D-region, i.e. until a B-
region is reached, governed by the so-called
Bernoulli stress regime;
FIRST ANALYSIS (B):
mechanical modeling by S&T
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22. 22
S & T Model Definition
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51. 51
CONCLUSIONS
• The evolution of the design of a bracket component,
supported by a cable-stayed system, is presented.
• This apparently simple element conceals a rather complex
structural geometry, developed to be suitable both for
strength requirements and constructability. The so devised
solution can assure:
– Manufacturing of precast elements without exterior parts;
– Minimal size of the bracket and completely hidden insertion in the
supported beams;
– Compliance with different standards.
• The evolution of the leading concepts and of the geometry
of this element is explained together with the numerical
analysis obtained both by synthetic models, like strut & tie,
and by full non linear finite element models.
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54. 54
INDEX PART 1
Basis of the Problem
Strut & Tie Modeling
Finite Element Analysis by
Substrucuring Technique and S&T
Improvement Strategies
Models and Programs Validation
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72. 72
DESIGN CRITERIA
• SIMPLICITY:
1. the load path from the loading appliction points to
the main internal region of the structural element
must be the simplest and the quitest; it means that
– the stress flow should be regular;
– stress concentrations should be avoided;
– the loading transfer should prefer direct
placement;
– integration between steel parts and concrete
must be accurate and anchorage truthful;
• DEPENDABILITY;
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73. 73
PERFORMANCE CRITERIA (i)
• Ultimate Limit State:
1. strength verified by partial safety factors
disequations; there are admitted yielded
parts of the bracket and damaged portions
of the concrete in the structural element;
– the strength capacity will be verified by non
linear analysis, starting from unloaded to
collapse loading;
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74. 74
PERFORMANCE CRITERIA (ii)
• Serviceability Limit State:
1. the structural behavior should be elastic-
linear until an adequate loading level
(usually, the ultimate loading level / 1.5);
– in particular, steel parts must not be yielded
anywhere and the concrete must experience
a low stress level;
2. the displacements of the bracket for service
loading must be limited;
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75. 75
PERFORMANCE CRITERIA (iii)
• Structural Robustness:
1. the connection device failure should develop
after major failure of the structural elemnt at
which the connection device is inserted;
2. the connection device must be able to
support the failure of one of the external ties,
i.e. each tie and directly connected parts
must be able anyway to support the double
of the service limit loading;
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78. 78
-1000
-800
-600
-400
-200
0
200
400
600
800
1000
-2000 0 2000 4000 6000 8000 10000
N
M
SYM
ASYM
M [kNm]
compression
N [kN]
tension
stirrups
longitudinal
bars
As=5 ø 22
As’=5 ø 22
ø 8/2b 9 cm
COLUMN REINFORCEMENT DESIGN
Reinforcement
ACTION N [kN] M [kNm]
SYM 2100 0
ASYM 1050 462
50 cm
60 cm
79. 79
STRUCTURAL MODELING (i)
• A slice of half column is considered
(plane stress assumption)
column
a
Vsd
Vsd
a/2
Vsd*=Vsd/2
Vsd* =Vsd/2
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81. 81
STRUCTURAL MODELING (model #1)
Strut & Tie modeling of the stayed bracket
STEP #1 STEP #2
STEP #3 STEP #4
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82. 82
STRUCTURAL MODELING (model #2)
Alternative S&T modeling of the stayed bracket
STEP #1
STEP #3 STEP #4
STEP #2
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83. 83
STRUCTURAL MODELING (model #3)
Alternative S&T modeling of the stayed bracket
STEP #1
STEP #3 STEP #4
STEP #2
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84. 84
STRUCTURAL MODELING
OF CONCRETE PART (I):
trusswork discretization
ab
lslAA
a
bsaAA
b
asbAA
ba
ba
ba
dd
yy
xx
2
2
2
2
2
8
3
2
3
8
3
2
3
8
3
2
,
,
,
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85. 85
4321
,,, uuuu
VIVIVIIIIII
NNNNNN ,,,,,
a
x
y
ux
b
y
y
vy
abx
v
y
u yx
b
l
aNNNN
N
VIVIII
x
a
l
bNNNN
N
VIVIVIII
y
l
NNN VIV
xy
xyyx NNN ,,
STRUCTURAL MODELING
OF CONCRETE PART (II):
stress representation
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111. 111
Legenda
Output Descrizione Valore di
Design
[N/mm^2]
SMAXBIEL tensione massima negli elementi rappresentanti i tiranti 580
SMAXTEL tensione massima negli elementi rappresentanti il telaio 290
SMINTEL tensione minima negli elementi rappresentanti il telaio -290
SMAXSTAF tensione massima negli elementi rappresentanti le armature lente
secondarie del pilastro
374
SMINSTAF tensione massima negativa negli elementi rappresentanti le armature lente
secondarie del pilastro
- 374
SMAXLONG tensione massima negli elementi rappresentanti le armature lente
principali del pilastro
374
SMINLONG tensione massima negativa negli elementi rappresentanti le armature lente
principali del pilastro
- 374
SMAXCA tensione massima negli elementi rappresentanti il calcestruzzo 1,5
SMINCA tensione massima negativa negli elementi rappresentanti il calcestruzzo -28
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126. 126
ELASTIC- PLASTIC MATERIAL LAW
WITH VON MISES CRITERION
62519.4
]N/mm[10000
max
2
max
00138.0
]N/mm[290 2
y
y
][N/mm210000 2
0 E
*100/1 01 EE
x10^(-3)
E0
E1
y
y
max
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127. 127
>290
<-290
Vsd = 1050 kN – cap element stress:
e-plastic analysis (stress X)
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128. 128
>290
<-290
Vsd = 1050 kN – cap element stress:
e-plastic analysis (stress Y)
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129. 129
>290
<-290
Vsd = 1050 kN – cap element stress:
e-plastic analysis (Von Mises) (I)
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130. 130
>580
<-580
Vsd = 1050 kN – cap element stress:
e-plastic analysis (Von Mises) (II)
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131. 131
Vsd = 1050 kN – cap element strain:
e-plastic analysis (Von Mises strain)
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132. 132
Vsd = 1050 kN – reinforcement bar stress
• max tension = 132 MPa
• min compression = -54,9 MPa
stirrups longitudinal
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133. 133
Vsd = 1050 kN – ties and concrete stress
concrete
• max tension = 0 MPa
• min compression = -19,8 MPa
• tension = 582,7 MPa
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147. 147
COMMENTS
• The actual configuration of the Stayed Bracket
seems to be not able in sustaining adequately the
load of Vsd=1050 kN both in symmetric and
asymmetric load scenarios.
• In general, the frame stresses are greater than the
yielding values, also if they are less than the failure
values.
• The amplitude of the yielded zone suggest to adopt
strategies to improve the stayed bracket
performances:
Strategy 1: improve the frame thickNess
Strategy 2: improve the frame size
Strategy 3: downloading
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150. 150
Vsd = 1050 kN – cap element stress
e-plastic analysis (stress X)
>290
<-290
Strategy 1: improve the frame thickNess
Actual thickNess
th = 6 mm
Improved thickNess
th = 10 mm
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151. 151
Vsd = 1050 kN – cap element stress
e-plastic analysis (stress Y)
Strategy 1: improve the frame thickNess
>290
<-290
Actual thickNess
th = 6 mm
Improved thickNess
th = 10 mm
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152. 152
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises) (I)
>290
<-290
Actual thickNess
th = 6 mm
Strategy 1: improve the frame thickNess
Improved thickNess
th = 10 mm
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153. 153
>580
<-580
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises) (II)
Actual thickNess
th = 6 mm
Strategy 1: improve the frame thickNess
Improved thickNess
th = 10 mm
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154. 154
Vsd = 1050 kN – cap element strain – e-
plastic analysis (Von Mises strain)
Strategy 1: improve the frame thickNess
Actual thickNess
th = 6 mm
Improved thickNess
th = 10 mm
155. 155
Vsd = 1050 kN – cap element strain
e-plastic analysis (Von Mises strain)
Improved thickNess
th = 10 mm
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156. 156
>580
<-580
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises)
th = 10mm
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157. 157
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises)
>290
<-290
th = 10mm
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158. 158
h0 h1
Strategy 2: improve the frame size
Actual Improved
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159. 159
Vsd = 1050 kN – cap element stress
e-plastic analysis (stress X)
>290
<-290
Strategy 2: improve the frame size
Actual size
h = 145 mm
Improved size
h = 200 mm
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160. 160
Vsd = 1050 kN – cap element stress
e-plastic analysis (stress Y)
>290
<-290
Strategy 2: improve the frame size
Actual size
h = 145 mm
Improved size
h = 200 mm
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161. 161
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises) (I)
>290
<-290
Strategy 2: improve the frame size
Actual size
h = 145 mm
Improved size
h = 200 mm
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162. 162
>580
<-580
Vsd = 1050 kN – cap element stress
e-plastic analysis (Von Mises) (II)
Strategy 2: improve the frame size
Actual size
h = 145 mm
Improved size
h = 200 mm
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243. 243
>290
<-290
Vsd = 1050*1,33= 1396,5 kN SYM th = 12 mm
cap element stress / e-plastic analysis
>290
<-290
STRESS Y
STRESS X
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244. 244
>290
<-290
von MISES I
Vsd = 1050*1,33= 1396,5 kN SYM th = 12 mm
cap element stress / e-plastic analysis
>580
<-580
von MISES II
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246. 246
ANALISI E VERIFICHE STRUTTURALI
DELLE CONFIGURAZIONI
per Vsd = 1050 Kn
IN PRESENZA DI PLUVIALE / A 2 VIE
ISOTROPA
Dicembre 2007
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