The document describes a new tool being developed called MONSTER to monitor the structural health of ancient masonry structures. It involves a wireless sensor network using low-cost accelerometers and software called NOSA-ITACA to model structural behavior. The system was tested on the San Frediano bell tower in Lucca, Italy. Operational modal analysis of tower vibration data matched well with frequencies obtained from a finite element model of the tower, helping validate the tool. The goal is to better assess conservation needs and monitor behavior over time of important masonry cultural heritage structures.
Real-Time Simulation for MBSE of Synchrophasor SystemsLuigi Vanfretti
This talk starts by exploring how electrical power systems are increasingly becoming digitalized, leading to their transformation into a class of cyber-physical systems (a system of systems) where the electrical grid merges with ubiquitous information and communication technologies (ICT).
This type of complex systems present unprecedented challenges in their operation and control, and due to unknown interactions with ICT, require new concepts, methods and tools to facilitate their operational design, manufacturing (of components), and testing/verification/validation of their performance.
Inspired by the tremendous advantages of the model-based system engineering (MBSE) framework developed by the aerospace and military communities, this talk will highlight the challenges to adopt MBSE for electrical power grids. MBSE is not only a framework to deal with all the phases of putting in place complex systems-of-systems, but also provides a foundation for the democratization of technology - both software and hardware.
The talk will illustrate the foundations that have been built by the presenter's research over the last 7 years, placed within the context of MBSE, with focus on areas of power engineering. Some of these foundations and contributions include the OpenIPSL, RaPId, SD3K, BableFish and Khorjin open source software developed and distributed online by the research group, and available at: https://github.com/ALSETLab
Industrial safety is one of the main aspects of industry specially mining industry. In the mining industry safety is a very vital factor. To avoid loss of material and damaging of human health, protection system as well as faithful communication system is necessary inside the underground mines.
To increase both safety and productivity in mines, a reliable communication must be established between workers, moving in the mine, and a fixed base station. Inside mines, the wired communication system is not so effective, because of wires can be damaged inside mines.
In this project we are going to monitor the Mine parameters like abnormal gas, temperature and fire sensors to avoid the harmful gas or high temperature attacking the Mine workers. In this project to avoid loss of material and damaging of human health in mine workers because of using text to voice converter.
The text to voice converter gives continues information inside the mine workers and also cameras are used to video monitoring.
TECNALIA IN WAVE ENERGY SCOTLAND ANNUAL CONFERENCE 2017
François-Xavier Faÿ and Pablo Ruiz-Minguela represented TECNALIA in the Wave Energy Scotland Annual Conference held on 28th November at the John McIntyre Conference Centre, Edinburgh. The WES Annual Conference is a major networking event to help wave energy technology companies to share their ideas.
Aware of the challenges raised by the topic of control in wave energy, WES is currently supporting a control system programme and yet has awarded 13 stage 1 projects (650k€). As lead contractor of one of the projects in competition, TECNALIA displayed a poster describing the concept.
The project dubbed WEETICS (Wave Energy Enhancement Through Innovative Control System) is a multilayer control architecture aiming at evaluating the best control action according to both internal and external conditions, as well as long term effects that can affect the system reliability. Not only this control system aims to increase the WEC performance but also to bring intelligence in order to improve availability, survivability and finally drive down the LCOE. The 1st stage of the project focuses on assessing the requirements and needs in order to ensure proper definition of the 3 layers. The solution is thought to be applicable to a wide range of WECs and PTO concepts, targeting the most mature technologies currently in development.
Correct time and timing is one of the foundational elements in enabling the communication and orchestration of technologies for accurate and optimal wide area monitoring, protection and control (WAMPAC) in the power industry. The National Institute of Standards and Technology (NIST) and the International Electrical and Electronic Engineer-Standard Association (IEEE-SA) conducted a workshop to gather inputs from stakeholders to identify, analyze, and provide guidance on technologies, standards and methodologies for addressing the practical timing challenges that are currently being experienced in wide area time synchronization. This paper summarizes the NIST “Timing Challenges in the Smart Grid,” workshop in January 2017.
GARE du MIDIH Open Digital Platforms the adoption of a standards-based open...MIDIH_EU
The Open Digital Platform importance in the Industrial Digital Transformation. Three MIDIH use cases: Lighthouse pilots - how they have benefits from MIDIH Open Source platform
Structural Health Monitoring platform presentation at NI week 2016IRS srl
Structural design or assessment, Damage detection and assessment,Maintenance and retrofitting of existing structures, structural control during earthquakes (using semi-active systems). Historic buildings, due to their structural features, construction techniques and used materials, are particularly vulnerable to earthquake actions;
Bridge inspection with the latest in robotic engineering and nondestructive testing methods. For cable stay and suspension bridges. Engineering that enhances infrastructure inspections. https://www.infrastructurepc.com
Bridge inspection and infrastructure inspection services using modern technology and robotics. Post Tension Tendon inspections, Bridge deck inspections, cable stay bridge inspections, suspension bridge inspection.
Real-Time Simulation for MBSE of Synchrophasor SystemsLuigi Vanfretti
This talk starts by exploring how electrical power systems are increasingly becoming digitalized, leading to their transformation into a class of cyber-physical systems (a system of systems) where the electrical grid merges with ubiquitous information and communication technologies (ICT).
This type of complex systems present unprecedented challenges in their operation and control, and due to unknown interactions with ICT, require new concepts, methods and tools to facilitate their operational design, manufacturing (of components), and testing/verification/validation of their performance.
Inspired by the tremendous advantages of the model-based system engineering (MBSE) framework developed by the aerospace and military communities, this talk will highlight the challenges to adopt MBSE for electrical power grids. MBSE is not only a framework to deal with all the phases of putting in place complex systems-of-systems, but also provides a foundation for the democratization of technology - both software and hardware.
The talk will illustrate the foundations that have been built by the presenter's research over the last 7 years, placed within the context of MBSE, with focus on areas of power engineering. Some of these foundations and contributions include the OpenIPSL, RaPId, SD3K, BableFish and Khorjin open source software developed and distributed online by the research group, and available at: https://github.com/ALSETLab
Industrial safety is one of the main aspects of industry specially mining industry. In the mining industry safety is a very vital factor. To avoid loss of material and damaging of human health, protection system as well as faithful communication system is necessary inside the underground mines.
To increase both safety and productivity in mines, a reliable communication must be established between workers, moving in the mine, and a fixed base station. Inside mines, the wired communication system is not so effective, because of wires can be damaged inside mines.
In this project we are going to monitor the Mine parameters like abnormal gas, temperature and fire sensors to avoid the harmful gas or high temperature attacking the Mine workers. In this project to avoid loss of material and damaging of human health in mine workers because of using text to voice converter.
The text to voice converter gives continues information inside the mine workers and also cameras are used to video monitoring.
TECNALIA IN WAVE ENERGY SCOTLAND ANNUAL CONFERENCE 2017
François-Xavier Faÿ and Pablo Ruiz-Minguela represented TECNALIA in the Wave Energy Scotland Annual Conference held on 28th November at the John McIntyre Conference Centre, Edinburgh. The WES Annual Conference is a major networking event to help wave energy technology companies to share their ideas.
Aware of the challenges raised by the topic of control in wave energy, WES is currently supporting a control system programme and yet has awarded 13 stage 1 projects (650k€). As lead contractor of one of the projects in competition, TECNALIA displayed a poster describing the concept.
The project dubbed WEETICS (Wave Energy Enhancement Through Innovative Control System) is a multilayer control architecture aiming at evaluating the best control action according to both internal and external conditions, as well as long term effects that can affect the system reliability. Not only this control system aims to increase the WEC performance but also to bring intelligence in order to improve availability, survivability and finally drive down the LCOE. The 1st stage of the project focuses on assessing the requirements and needs in order to ensure proper definition of the 3 layers. The solution is thought to be applicable to a wide range of WECs and PTO concepts, targeting the most mature technologies currently in development.
Correct time and timing is one of the foundational elements in enabling the communication and orchestration of technologies for accurate and optimal wide area monitoring, protection and control (WAMPAC) in the power industry. The National Institute of Standards and Technology (NIST) and the International Electrical and Electronic Engineer-Standard Association (IEEE-SA) conducted a workshop to gather inputs from stakeholders to identify, analyze, and provide guidance on technologies, standards and methodologies for addressing the practical timing challenges that are currently being experienced in wide area time synchronization. This paper summarizes the NIST “Timing Challenges in the Smart Grid,” workshop in January 2017.
GARE du MIDIH Open Digital Platforms the adoption of a standards-based open...MIDIH_EU
The Open Digital Platform importance in the Industrial Digital Transformation. Three MIDIH use cases: Lighthouse pilots - how they have benefits from MIDIH Open Source platform
Structural Health Monitoring platform presentation at NI week 2016IRS srl
Structural design or assessment, Damage detection and assessment,Maintenance and retrofitting of existing structures, structural control during earthquakes (using semi-active systems). Historic buildings, due to their structural features, construction techniques and used materials, are particularly vulnerable to earthquake actions;
Bridge inspection with the latest in robotic engineering and nondestructive testing methods. For cable stay and suspension bridges. Engineering that enhances infrastructure inspections. https://www.infrastructurepc.com
Bridge inspection and infrastructure inspection services using modern technology and robotics. Post Tension Tendon inspections, Bridge deck inspections, cable stay bridge inspections, suspension bridge inspection.
Strumenti informatici per la modellazione e la verifica del comportamento str...MMSLAB
AR FAS REGIONE TOSCANA
Linea di Azione 1.1.a.3 Scienze e tecnologie per la salvaguardia e la valorizzazione dei beni culturali
Laboratorio di Meccanica dei Materiali e delle Strutture ISTI-CNR
Dipartimento di Ingegneria Civile e Ambientale, UNIFI
Programma di Ricerca : Modelli e Metodi per l’Analisi Strutturale Caso studio...MMSLAB
PAR FAS REGIONE TOSCANA
Linea di Azione 1.1.a.3 Scienze e tecnologie per la salvaguardia e la valorizzazione dei beni culturali
Laboratorio di Meccanica dei Materiali e delle Strutture ISTI-CNR
Dipartimento di Ingegneria Civile e Ambientale, UNIFI
Analisi numerica di problemi di ingegneria strutturaleMMSLAB
Nel seminario verranno presentati due problemi applicativi che nascono nell'ambito dell'ingegneria strutturale e che richiedono la risoluzione di problemi a larga scala: il primo è un problema di ottimizzazione non lineare vincolato legato alla progettazione di strutture aeronautiche, mentre il secondo è un problema agli autovalori vincolato risultante dall'analisi modale di edifici storici in muratura. Verrà analizzata la struttura dei problemi e verranno proposte strategie numeriche ad hoc per la loro risoluzione in grado di gestire sia le grandi dimensioni che i vincoli sulle variabili. Nel primo caso proporremo l'utilizzo di strategie "multilevel" e nel secondo caso sfrutteremo tecniche di algebra lineare per matrici sparse.
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
Welcome to WIPAC Monthly the magazine brought to you by the LinkedIn Group Water Industry Process Automation & Control.
In this month's edition, along with this month's industry news to celebrate the 13 years since the group was created we have articles including
A case study of the used of Advanced Process Control at the Wastewater Treatment works at Lleida in Spain
A look back on an article on smart wastewater networks in order to see how the industry has measured up in the interim around the adoption of Digital Transformation in the Water Industry.
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.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
2. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 2
• Structural Health Monitoring refers to technologies used both to measure specific parameters
and physical quantities that provide information about a building’s structural behavior and to
aid in choosing appropriate interventions of consolidation and seismic retrofitting.
• MONSTER project was set up to develop an integrated set of technologies to perform more
sophisticated assessments of the conservation status of masonry constructions and to monitor
their behavior over time.
low-cost
flexible
platform
(ASIMOV)
• Ability to gather data
through different types
of sensors installed on
buildings
specific
software
(NOSA-
ITACA) [1]
• Ability to monitor and
model the mechanical
behavior of the
structure under study
NEW
SYSTEM
TOOL
[1] www.nosaitaca.it
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• ASIMOV (Acquisition System for low-Intensity MOnument Vibration) has been designed
and built at ISTI-CNR . It is based on a 3-axis accelerometer, whose native resolution settings
have been adapted to suit the specific needs of structural monitoring. The system has been
designed so that it can automatically adapt to variations in acceleration within the range of
10-3 m/sec2 to 20 m/sec2.
The acquisition system (length in cm)
Instrumental
Amplifier
-
+
AGC
ADC
X
Y
Z
Communication
Interface
Accelerometer
Zero-g Level
Generator
P
Block diagram of the system
• The system has a sampling frequency of 100 Hz. It is equipped with a 16 bit analogue-to-
digital converter (ADC) and a serial interface to communicate with external devices. The
system can communicate via most commercial data transmission interfaces.
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 4
• Calibration of the system plays a crucial role in developing an effective and reliable WSN
accelerometer. In order to calibrate the accelerometer, comparisons have been carried out
between ASIMOV and TITAN, a 3-axis accelerometer made available by the Italian Institute
of Geophysics and Vulcanology (the INGV-Istituto Italiano di Geofisica e Vulcanologia).
The acquisition system (length in cm) TITAN
5. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 5
• Calibration: comparisons in terms of time-history and PSD (Power Spectral Density)
between ASIMOV and TITAN:
Power Spectral Density Acceleration versus time
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• Calibration via ambient vibration tests using the wooden frame structure shown in the figure.
The calibration device
Initial displacements u0 were assigned to the top of the frame for different values of the mass m applied to the
structure, and the acceleration of the freely vibrating system measured; each experiment was repeated four
times. The collected data were then compared with the results of the numerical simulations conducted via the
NOSA-ITACA code.
Acceleration versus time
Discrete Fourier Transform
7. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 7
• Wireless sensor network (under development).
Two basic requirements must be fulfilled: reliability and scalability of the data transmission.
Reliability means reducing any potential data loss to a minimum, while scalability involves the
ability to install a large number of sensors within the network without compromising data
transmission performance. The network is made up of various “rings”, each of which includes a
commander node, called the “sink” (the core of the ring), and a sufficient number of sensor nodes
(e.g., accelerometers) to ensure the necessary amount of transmitted data. Each sink receives the
sampled data from the sensor nodes either continuously, or following a prescheduled sampling
sequence, depending on how it is programmed.
The WSN topology
Sensor
Node
Sink
Sensor
Node
Sink
The firmware of the node enables point-to-multipoint
communication between the sink and its subset of
nodes, as well as point-to-point communication
between any node and the sink. Through the point-
to-multipoint communication, a sink can start
acquisition on the sensor nodes simultaneously, as
well as perform synchronization of the
acquisitions. When the acquisition window has
ended, all sensor nodes can send their data to the sink
through the point-to-point communication link.
The sink can perform proper synchronization of
its subset of nodes through a Real-Time Clock
system.
8. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 8
• NOSA-ITACA code (http://www.nosaitaca.it/en/download). Freeware/open-source software
for computational mechanics distributed with the aim of disseminating the use of
mathematical models and numerical tools in the field of Cultural Heritage (constitutive
equation of masonry-like materials).
9. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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1-4 September 2015 A new tool for monitoring and assessing the structural health of ancient masonry constructions 9
• Case study: the San Frediano bell tower in Lucca (dating back to the 11th century).
The bell tower of San Frediano Survey of the bell tower
Characteristics of the tower:
• Height 52 m;
• Walls thickness varies from ~ 2.1 m at the base, to 1.6 m at the top;
• Two masonry vaults (at about 9 m and 38 m);
• Hip roof with wooden trusses and rafters;
• Different types of masonry as indicated in the scheme.
Stone
masonry
Brick and
mortar
masonry
Stone
masonry
Stone
masonry
Scheme of the tower materials composition
10. CC2015-24: Monitoring for Damage Detection, Vulnerability Assessment, Forecast and Protection Of
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A sensor network will be installed on the interior surface of the
tower's walls. The positions of the accelerometers to be placed
on 5 levels inside the tower are illustrated in the figure. When
installed and tested, the network will enable comparisons of the
frequencies and modal shapes calculated via the NOSA-ITACA
code and the same quantities calculated via suitable dynamic
identification techniques on the accelerations recorded.
PiazzaRe
Via San Frediano
SECTION 1
Basilicaof
SanFrediano
+1.64
SECTION 1
0.00
+40.88
+37.53
+29.60
+20.25
+16.65
+8.57
+6.68
6.6329.03
52.25
SECTION 2
SECTION 3
SECTION 4
SECTION 5
+1.64
+20.25
+16.65
+8.57
+29.60
+37.96
+40.88
+43.88
7.98
PiazzaRe
Via San Frediano
PiazzaRe
Via San Frediano
8.40
8.55
SECTION A-A SECTION B-B
A
SECTION 2 SECTION 5
A A
PiazzaRealCollegio
Via San Frediano
SECTION 1
Basilicaof
SanFrediano
+1.64
SECTION 1
0.00
+29.60
+20.25
+16.65
+8.57
+6.68
6.6329.03
52.25
SECTION 2
SECTION 3
+1.64
+20.25
+16.65
+8.57
+29.60
+8.57
7.98
PiazzaRealCollegio
Via San Frediano
PiazzaRealCollegio
PiazzaRealCollegio
PiazzaRealCollegio
Via San Frediano
Interior of Basilica of
San Frediano
+20.25
5.48
8.40
+29.60
5.48
8.40
+37.96
8.55
+40.88
5.54
8.55
5.54
Sensor node
Sink
SECTION A-A SECTION B-B
B
A
SECTION 2
Via San Frediano
SECTION 3
Via San Frediano
SECTION 4
SECTION 5
B B B B B
B B B B
A
A
A
A
A
A
A
A
A
• The sensor network on the case study
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• Preliminary monitoring: data acquisition from 1 pm May 29th , until 8 am June 3rd of this year
(ambient vibration).
Piazza Real Collegio
ViaSanFrediano
SECTION 1
Basilicaof
SanFrediano
+1.64
SECTION 1
0.00
+40.88
+37.53
+29.60
+20.25
+16.65
+8.57
+6.68
6.6329.03
52.25
SECTION 2
SECTION 3
SECTION 4
+1.64
+20.25
+16.65
+8.57
+29.60
+37.96
+40.88
+43.88
+8.57
7.98
InteriorofBasilicaof
SanFrediano
Sensor node
and digital acquisition
system
SECTION A-A SECTION B-B
B
B
A A
x
y
Sensor n°942
DAQ n°946
Sensor n°942
DAQ n°946
Sensor n°943
DAQ n°947
Sensor n°944
DAQ n°948
Sensor n°945
DAQ n°949
Four Seismic stations (SARA) placed along a vertical line:
- Digital acquisition system SL06;
- Seismometer SS20;
- Sampling frequency 100Hz.
Seismic station
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In order to perform a preliminary modal
analysis, the tower’s structure has been
discretized into 45641 brick elements
(element n°. 8 of the NOSA-ITACA code
element library) with 136923 degrees of
freedom. The steel tie rods and wooden
elements of the roof have been discretized
using beam elements (n°. 9 of the NOSA-
ITACA code element library). As a first
attempt the masonry has been modeled as a
homogeneous material with Young’s modulus
E = 4000 MPa, Poisson’s ratio = 0.2 and
mass density = 1800 kg/m3.
The structure is assumed to be clamped at the base, and additional boundary conditions have been imposed
12.50m above the base to account for the church’s walls.
• FEM analysis
FEM model: a) overview; b) west side; c) south side; d) cross-section and
magnification of the model
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• Operational Modal Analyses Techniques
OMA
Operational Modal
Analyses
Non-Parametric
model
……
Stochastic Subspace
Identification (SSI)
……
Parametric model
……
Enhanced
Frequency Domain
Decomposition
(EFDD)
……
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OMA technique used: Enhanced Frequency Domain Decomposition via the TruDI software
(sTructural Dynamic Identification) developed within the project.
Mode 1 (along X):
fFEM = 1.177 Hz
fEFDD = 1.116 Hz
xEFDD = 0.81 %
Mode 2 (along Y):
fFEM = 1.367 Hz
fEFDD = 1.385 Hz
xEFDD = 0.85%
• Data processing results versus FEM analysis results
Mode3 (torsional mode):
fFEM = 3.341 Hz
fEFDD = 3.485 Hz
xEFDD = 0.29 %
Mode 4 (along X):
fFEM = 5.053 Hz
fEFDD = 4.606 Hz
xEFDD = 0.22%
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• Updating the FEM model by varying the physical and mechanical characteristics of the
materials
Mode 1 Mode 2 Mode 3 Mode 4
Experimental
Frequency
1.116 Hz 1.385 Hz 3.485 Hz 4.606 Hz
Finite Element
Model
Freq.
[Hz]
MAC
Freq.
[Hz]
MAC
Freq.
[Hz]
MAC
Freq.
[Hz]
MAC
Model 1 1.117 0.921 1.367 0.952 3.341 0.315 5.053 0.703
Model 2 1.152 0.918 1.349 0.955 3.204 0.312 4.833 0.704
• Model 1: frequencies yielded by FEM modal analysis considering
homogeneous elastic material with Young’s modulus E = 4000
MPa and mass density = 1800 kg/m3;
• Model 2: frequencies yielded by FEM modal analysis considering
3 different materials (see figure).
•
fEXP, experimental modal vector; yFEM, numerical modal vector
H, complex conjugate transpose (Hermitian)
Brick and mortar
masonry
E=3500 MPa
=1800 kg/m3
Stone
masonry
E=5500 MPa
=2000 kg/m3
Stone
masonry
E=5500 MPa
=2000 kg/m3
Stone
masonry
E=5500 MPa
=2000 kg/m3
EXP
H
EXPEXP
H
EXP
2
FEM
H
EXP
FEMEXP ),(MAC
yyff
yf
yf
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Conclusion
• The presentation has illustrated the progress and some preliminary results of the MONSTER
project, whose aim is to develop an integrated monitoring and simulation system for age-old
masonry constructions based on wireless sensor networks and the NOSA-ITACA code
(http://www.nosaitaca.it/en/download).
• A small, inexpensive wireless sensor has been developed based on a 3-axis MEMS
accelerometer whose native resolution settings have been adapted to enable structural
monitoring of historical buildings.
• Preliminary laboratory results show the reliability of the proposed systems in terms of both
measured accelerations and sample frequencies.
• Some prototypes are in the process of being produced and will be installed on the San Frediano
bell tower in Lucca in order to estimate the acceleration levels.
• A finite element model of the tower has been built via the NOSA-ITACA code, and a
preliminary modal analysis of the tower performed shows good agreement between the
experimental and numerical results.
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Thank you for your
kind attention
P. Barsocchi1, P. Cassarà1, E. Ferro1, M. Girardi2,
F. Mavilia1, C. Padovani2 and D. Pellegrini2
1 WN-Lab, Institute of Information Science and Technologies, Italian National Research Council, Pisa, Italy
2 MMS-Lab, Institute of Information Science and Technologies, Italian National Research Council, Pisa, Italy
daniele.pellegrini@isti.cnr.it