Numerical investigation of the progressive collapse of steel structures due to plan irregularities

Amir Homaioon Ebrahimi; Pedro Martinez-Vazquez; Charalampos Baniotopoulos

Numerical investigation of the progressive collapse of steel structures due to plan irregularities

Amir Homaioon Ebrahimi, Pedro Martinez-Vazquez, Charalampos Baniotopoulos

Civil Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

Three buildings of different height, regular and irregular as per their plan layout, are designed according to AISC [1] and ASCE7 [2]. These structures were considered to be located in regions with different seismic activity with the purpose of observing their dynamic response under seven load-column-removal scenarios by using non-linear static and dynamic analyses. Non-linear dynamic analyses examine the effect of columns removal on adjacent columns, including node-displacement configurations whilst non-linear static analyses focus on the push-over curve and yield load factor. The results indicate that irregular structures designed in site class C seismic zone do collapse in most of the column removal scenarios. It is also demonstrated that higher level of redundancy showed by the 5-storey with respect to the 2-storey building plays an important role in the prediction of progressive collapse. The collected data lead to various reflections related to regular and irregular building performance under seismic load and the importance of prioritising redundancy and robustness in the context of ultimate limit strength design approaches.

Original language	English
Title of host publication	9th International Conference on Computational Mechanics GRACM
Publication status	Published - Jun 2018
Event	9th International Conference on Computational Mechanics GRACM - Chania, Greece Duration: 4 Jun 2018 → 6 Jun 2018

Conference

Conference	9th International Conference on Computational Mechanics GRACM
Country/Territory	Greece
City	Chania
Period	4/06/18 → 6/06/18

Bibliographical note

This paper examines the progressive collapse of buildings caused by abnormal load scenarios such as vehicle impact or explosions. Mechanisms of local failure which undermine the overall stability of buildings are critically evaluated in the context of international building regulations. The outcome of this process enabled the risk of failure of four different buildings to be assessed after the parameterisation of structural performance. This is consistent with design approaches adopted by major building codes around the globe and contributes to our understanding of the impact that ill-load conditions can have on the safety and integrity of people and constructions.

Keywords

Progressive collapse
Irregularity in plans
Steel structures
Non-linear dynamic analysis
Non-linear static analysis

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Homaioon_Numerical_Investigation
Checked 19/06/2018.
Final published version, 2.29 MBLicence: None: All rights reserved

Cite this

@inproceedings{f79e085598214786996de9a3fad54997,

title = "Numerical investigation of the progressive collapse of steel structures due to plan irregularities",

abstract = "Three buildings of different height, regular and irregular as per their plan layout, are designed according to AISC [1] and ASCE7 [2]. These structures were considered to be located in regions with different seismic activity with the purpose of observing their dynamic response under seven load-column-removal scenarios by using non-linear static and dynamic analyses. Non-linear dynamic analyses examine the effect of columns removal on adjacent columns, including node-displacement configurations whilst non-linear static analyses focus on the push-over curve and yield load factor. The results indicate that irregular structures designed in site class C seismic zone do collapse in most of the column removal scenarios. It is also demonstrated that higher level of redundancy showed by the 5-storey with respect to the 2-storey building plays an important role in the prediction of progressive collapse. The collected data lead to various reflections related to regular and irregular building performance under seismic load and the importance of prioritising redundancy and robustness in the context of ultimate limit strength design approaches. ",

keywords = "Progressive collapse, Irregularity in plans, Steel structures, Non-linear dynamic analysis, Non-linear static analysis",

author = "{Homaioon Ebrahimi}, Amir and Pedro Martinez-Vazquez and Charalampos Baniotopoulos",

note = "This paper examines the progressive collapse of buildings caused by abnormal load scenarios such as vehicle impact or explosions. Mechanisms of local failure which undermine the overall stability of buildings are critically evaluated in the context of international building regulations. The outcome of this process enabled the risk of failure of four different buildings to be assessed after the parameterisation of structural performance. This is consistent with design approaches adopted by major building codes around the globe and contributes to our understanding of the impact that ill-load conditions can have on the safety and integrity of people and constructions.; 9th International Conference on Computational Mechanics GRACM ; Conference date: 04-06-2018 Through 06-06-2018",

year = "2018",

month = jun,

language = "English",

booktitle = "9th International Conference on Computational Mechanics GRACM",

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TY - GEN

T1 - Numerical investigation of the progressive collapse of steel structures due to plan irregularities

AU - Homaioon Ebrahimi, Amir

AU - Martinez-Vazquez, Pedro

AU - Baniotopoulos, Charalampos

N1 - This paper examines the progressive collapse of buildings caused by abnormal load scenarios such as vehicle impact or explosions. Mechanisms of local failure which undermine the overall stability of buildings are critically evaluated in the context of international building regulations. The outcome of this process enabled the risk of failure of four different buildings to be assessed after the parameterisation of structural performance. This is consistent with design approaches adopted by major building codes around the globe and contributes to our understanding of the impact that ill-load conditions can have on the safety and integrity of people and constructions.

PY - 2018/6

Y1 - 2018/6

N2 - Three buildings of different height, regular and irregular as per their plan layout, are designed according to AISC [1] and ASCE7 [2]. These structures were considered to be located in regions with different seismic activity with the purpose of observing their dynamic response under seven load-column-removal scenarios by using non-linear static and dynamic analyses. Non-linear dynamic analyses examine the effect of columns removal on adjacent columns, including node-displacement configurations whilst non-linear static analyses focus on the push-over curve and yield load factor. The results indicate that irregular structures designed in site class C seismic zone do collapse in most of the column removal scenarios. It is also demonstrated that higher level of redundancy showed by the 5-storey with respect to the 2-storey building plays an important role in the prediction of progressive collapse. The collected data lead to various reflections related to regular and irregular building performance under seismic load and the importance of prioritising redundancy and robustness in the context of ultimate limit strength design approaches.

AB - Three buildings of different height, regular and irregular as per their plan layout, are designed according to AISC [1] and ASCE7 [2]. These structures were considered to be located in regions with different seismic activity with the purpose of observing their dynamic response under seven load-column-removal scenarios by using non-linear static and dynamic analyses. Non-linear dynamic analyses examine the effect of columns removal on adjacent columns, including node-displacement configurations whilst non-linear static analyses focus on the push-over curve and yield load factor. The results indicate that irregular structures designed in site class C seismic zone do collapse in most of the column removal scenarios. It is also demonstrated that higher level of redundancy showed by the 5-storey with respect to the 2-storey building plays an important role in the prediction of progressive collapse. The collected data lead to various reflections related to regular and irregular building performance under seismic load and the importance of prioritising redundancy and robustness in the context of ultimate limit strength design approaches.

KW - Progressive collapse

KW - Irregularity in plans

KW - Steel structures

KW - Non-linear dynamic analysis

KW - Non-linear static analysis

M3 - Conference contribution

BT - 9th International Conference on Computational Mechanics GRACM

T2 - 9th International Conference on Computational Mechanics GRACM

Y2 - 4 June 2018 through 6 June 2018

ER -

Numerical investigation of the progressive collapse of steel structures due to plan irregularities

Abstract

Conference

Bibliographical note

Keywords

Access to Document

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Cite this