This document summarizes research on modeling soil-structure interaction in OpenSees. It describes developing a modeling tool using a "monkey-tail" model of a vibrating footing on an elastic soil half-space. The model is implemented and validated in OpenSees. Case studies of two building frames with and without soil-structure interaction show increased drift when interaction is considered. Finally, the soil amplification factor depends on period, intensity, and soil stiffness.
The NextGEOSS project, a European contribution to GEOSS (Global Earth Observation System of Systems), proposes to develop the next generation data hub for Earth Observations, where the users can connect to access data and deploy data-driven applications.
European Open Science Cloud & EOSCsecretariat.eu
Donatella Castelli, EOSCsecretariat
Presented at the 2nd SSHOC Consortium Meeting, Florence, 14-15 October 2019
Promoting the use of Open Data facilitates more attractive conditions and practical relevance of research and education. OpenGeoEdu aims to prepare Open (Geo-)Data for education and science and to provide open access to cost-free data without restrictions. The use of Open Data will be taught with best practice examples from Geospatial Science and Technology that are conveyed in the form of e-learning lessons and Massive Open Online Courses (MOOCs). This talk will summarize the current state of the project, which just started in Summer 2017, and discuss its concepts and implementation. We present an online-platform for searching Open Data portals and Geodatainfrastructures and describe our prospective e-learning environment.
Project website: https://www.opengeoedu.de
Conference website: http://wherecamp2017.geoit.org
Overview of GEO activities to promote broad open Earth observations data and information, as well as insight into GEO engagement priorities and links to ISPRS.
Introduction presentation to the 18th Science Projects Workshop at the Future Classroom Lab by European Schoolnet, held 8-10 December 2017 in Brussels, Belgium.
The NextGEOSS project, a European contribution to GEOSS (Global Earth Observation System of Systems), proposes to develop the next generation data hub for Earth Observations, where the users can connect to access data and deploy data-driven applications.
European Open Science Cloud & EOSCsecretariat.eu
Donatella Castelli, EOSCsecretariat
Presented at the 2nd SSHOC Consortium Meeting, Florence, 14-15 October 2019
Promoting the use of Open Data facilitates more attractive conditions and practical relevance of research and education. OpenGeoEdu aims to prepare Open (Geo-)Data for education and science and to provide open access to cost-free data without restrictions. The use of Open Data will be taught with best practice examples from Geospatial Science and Technology that are conveyed in the form of e-learning lessons and Massive Open Online Courses (MOOCs). This talk will summarize the current state of the project, which just started in Summer 2017, and discuss its concepts and implementation. We present an online-platform for searching Open Data portals and Geodatainfrastructures and describe our prospective e-learning environment.
Project website: https://www.opengeoedu.de
Conference website: http://wherecamp2017.geoit.org
Overview of GEO activities to promote broad open Earth observations data and information, as well as insight into GEO engagement priorities and links to ISPRS.
Introduction presentation to the 18th Science Projects Workshop at the Future Classroom Lab by European Schoolnet, held 8-10 December 2017 in Brussels, Belgium.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Event Management System Vb Net Project Report.pdfKamal Acharya
In present era, the scopes of information technology growing with a very fast .We do not see any are untouched from this industry. The scope of information technology has become wider includes: Business and industry. Household Business, Communication, Education, Entertainment, Science, Medicine, Engineering, Distance Learning, Weather Forecasting. Carrier Searching and so on.
My project named “Event Management System” is software that store and maintained all events coordinated in college. It also helpful to print related reports. My project will help to record the events coordinated by faculties with their Name, Event subject, date & details in an efficient & effective ways.
In my system we have to make a system by which a user can record all events coordinated by a particular faculty. In our proposed system some more featured are added which differs it from the existing system such as security.
Hybrid optimization of pumped hydro system and solar- Engr. Abdul-Azeez.pdffxintegritypublishin
Advancements in technology unveil a myriad of electrical and electronic breakthroughs geared towards efficiently harnessing limited resources to meet human energy demands. The optimization of hybrid solar PV panels and pumped hydro energy supply systems plays a pivotal role in utilizing natural resources effectively. This initiative not only benefits humanity but also fosters environmental sustainability. The study investigated the design optimization of these hybrid systems, focusing on understanding solar radiation patterns, identifying geographical influences on solar radiation, formulating a mathematical model for system optimization, and determining the optimal configuration of PV panels and pumped hydro storage. Through a comparative analysis approach and eight weeks of data collection, the study addressed key research questions related to solar radiation patterns and optimal system design. The findings highlighted regions with heightened solar radiation levels, showcasing substantial potential for power generation and emphasizing the system's efficiency. Optimizing system design significantly boosted power generation, promoted renewable energy utilization, and enhanced energy storage capacity. The study underscored the benefits of optimizing hybrid solar PV panels and pumped hydro energy supply systems for sustainable energy usage. Optimizing the design of solar PV panels and pumped hydro energy supply systems as examined across diverse climatic conditions in a developing country, not only enhances power generation but also improves the integration of renewable energy sources and boosts energy storage capacities, particularly beneficial for less economically prosperous regions. Additionally, the study provides valuable insights for advancing energy research in economically viable areas. Recommendations included conducting site-specific assessments, utilizing advanced modeling tools, implementing regular maintenance protocols, and enhancing communication among system components.
Student information management system project report ii.pdfKamal Acharya
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Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
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Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
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Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
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the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
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Modelling of soil-structure interaction in OpenSees: A practical approach for performance-based engineering
1. Modelling of Soil-Structure Interaction in OpenSees:
A Practical Approach for Performance-Based Engineering
Smail Kechidi, Researcher, University of Porto
Aires Colaço, Ph.D. Student, University of Porto
Mário Marques, Post-Doctoral Researcher, University of Porto
José Miguel Castro, Assistant Professor, University of Porto
Pedro Alves Costa, Assistant Professor, University of Porto
OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
2. 1. Background and Motivation
2. Soil-Structure Interaction Modelling Tool
• Formulation of the Problem
• Model Implementation in OpenSees
• Validation of the Proposed Model
3. Case Studies
• Description of the Buildings
• EC8-based Ground Motion Record Selection
• Seismic Performance Assessment
Approaches I and II (with and without Soil-Structure
Interaction)
Approach III (Soil-Structure Interaction and site effect)
• Soil Factor
4. Conclusions
2/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Overview
3. Background and Motivation
Layered Soil
Input motion
Bedrock motion
Free
surface
motion
???
3/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
4. • Motivation for the research presented herein:
• Building codes discourage designs that allow the mobilisation
of the foundation capacity.
• Development of a well-calibrated modelling tool, coupled with
parameter selection protocols cast in a simplistic fashion.
• Encourage the modelling of SSI within the community of
practicing engineers
• Is the prevailing belief, saying that ignoring soil-structure
interaction leads to conservative results, always valid?
4/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Background and Motivation
5. • Formulation of the Problem
Kbub + Cb ̇ub + Mb ̈ub = Fb
us
b
= Δub + u
̇us
b
= Δ ̇ub + ̇u
̈us
b
= Δ ̈ub
+ ̈u
�Fb = −Fs = −(KsΔu𝑏𝑏 + CsΔ ̇𝑢𝑢𝑏𝑏 + MsΔ ̈𝑢𝑢𝑏𝑏
𝐾𝐾 𝑎𝑎𝑎𝑎
𝐾𝐾 𝑎𝑎𝑎𝑎
𝐾𝐾 𝑏𝑏𝑏𝑏 𝐾𝐾 𝑏𝑏𝑏𝑏 + Ks
𝑢𝑢a
𝑢𝑢b
+
𝐶𝐶 𝑎𝑎𝑎𝑎
𝐶𝐶 𝑎𝑎𝑎𝑎
𝐶𝐶 𝑏𝑏𝑏𝑏 𝐶𝐶 𝑏𝑏𝑏𝑏 + Cs
̇𝑢𝑢a
̇𝑢𝑢b
+
𝑀𝑀𝑎𝑎𝑎𝑎
𝑀𝑀𝑎𝑎𝑎𝑎
𝑀𝑀𝑏𝑏𝑏𝑏 𝑀𝑀𝑏𝑏𝑏𝑏 + Ms
̈𝑢𝑢a
̈𝑢𝑢b
=
0
Ksu + Cs ̇𝑢𝑢 + Ms ̈𝑢𝑢
5/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Soil-Structure Interaction Modelling Tool
6. Monkey-tail modelVertical vibrating surface footing
resting on a homogeneous elastic
half space
6/21
• Model Implementation in OpenSees
OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Soil-Structure Interaction Modelling Tool
7. 7/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Soil-Structure Interaction Modelling Tool
• Model Implementation in OpenSees
8. 8/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
• Validation of the Proposed Model
Soil-Structure Interaction Modelling Tool
9. Vs30 = 800 m/s Vs30 = 360 m/s
Vs30 = 180 m/s Vs30 = 100 m/s
• Validation of the Proposed Model (SDOF)
9/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Soil-Structure Interaction Modelling Tool
10. Vs30 = 180 m/s Vs30 = 100 m/s
• Validation of the Proposed Model (Oscillator)
10/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Soil-Structure Interaction Modelling Tool
11. Gravity designed frame “GB”
Seismically design frame “SB3” (Lisbon, soil class C and q = 4)
• Description of the Buildings
11/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Study
12. GB frame T1= 1.61 sec SB3 frame T1= 0.87 sec
• EC8-Based Ground Motion Record Selection (SelEQ)
12/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Study
13. ug(t)ug(t)
Fixed bases
(Approaches I)
SSI consideration using
the Monkey-tail model
(Approaches II)
• Seismic Performance Assessment
13/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Studies
14. GB fame
2%/50 yrs.
10%/50 yrs.
• Approaches I and II
SB3 fame
14/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Studies
15. Layered Soil
Rock
Input motion
1-
Deconvolution
process
2- Convolution
process
Bedrock motion
Free
surface
motion
15/21
• Approach III
OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Studies
16. Vs30=360 m/s Vs30=180 m/s
• Approach III
16/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Case Studies
17. 2%/50 yrs.
10%/50 yrs.
• Approach III (SB3 frame)
17/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Vs30=360 m/s Vs30=180 m/s
Case Studies
18. Vs30=360 m/s Vs30=180 m/s
18/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
• Approach III
Case Studies
20. • Using lumped parameter models can be seen as a good
option considering the compromise between accuracy of
the solution and reduction of the computation effort.
• Drifts considering the Soil-Structure Interaction are even
larger in the lower stories than those of the fixed-base
case.
• Dependence of the amplification soil factor on the
fundamental period of vibration, seismic intensity level
and soil stiffness.
20/21OpenSees Days Europe 2017, First European Conference on OpenSees Porto, Portugal, 19–20 June 2017
Conclusions
