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Application of reliability-based robustness assessment of steel moment resisting frame structures under post-mainshock cascading events

Ribeiro, Filipe L.A.; Barbosa, André R.; Neves, Luís C.

Authors

Filipe L.A. Ribeiro

André R. Barbosa



Abstract

This paper proposes a reliability-based framework for quantifying structural robustness considering the occurrence of a major earthquake (mainshock) and subsequent cascading hazard events, such as aftershocks that are triggered by the mainshock. These events can significantly increase the probability of failure of buildings, especially for structures that are damaged during the mainshock. The application of the proposed framework is exemplified through three numerical case studies. The case studies correspond to three SAC steel moment frame buildings of three, nine, and 20 stories, which were designed to pre-Northridge codes and standards. Two-dimensional nonlinear finite-element models of the buildings are developed with the Open System for Earthquake Engineering Simulation framework (OpenSees), using a finite length plastic hinge beam model and a bilinear constitutive law with deterioration, and are subjected to multiple mainshock-aftershock seismic sequences. For the three buildings analyzed herein, it is shown that the structural reliability under a single seismic event can be significantly different from that under a sequence of seismic events. The reliability based robustness indicator shows that the structural robustness is influenced by the extent to which a structure can distribute damage.

Citation

Ribeiro, F. L., Barbosa, A. R., & Neves, L. C. (in press). Application of reliability-based robustness assessment of steel moment resisting frame structures under post-mainshock cascading events. Journal of Structural Engineering, 140(8), https://doi.org/10.1061...%29ST.1943-541X.0000939

Journal Article Type Article
Acceptance Date Sep 6, 2013
Online Publication Date Mar 10, 2014
Deposit Date Sep 18, 2017
Publicly Available Date Sep 18, 2017
Journal Journal of Structural Engineering
Print ISSN 0733-9445
Electronic ISSN 1943-541X
Publisher American Society of Civil Engineers
Peer Reviewed Peer Reviewed
Volume 140
Issue 8
Article Number A4014008
DOI https://doi.org/10.1061/%28ASCE%29ST.1943-541X.0000939
Keywords Aftershock; Nonlinear dynamic analysis; Robustness; Seismic sequences; Structural Safety and Reliability
Public URL http://eprints.nottingham.ac.uk/id/eprint/46485
Publisher URL http://ascelibrary.org/doi/10.1061/%28ASCE%29ST.1943-541X.0000939
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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