Post-earthquake collapse safety of damaged buildings subjected to aftershock hazard

Z. Muderrisoglu, U. Yazgan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Reliable and quick assessment of the collapse probability of damaged buildings is a critical issue in post-earthquake response and recovery processes. Rapid and consistent evaluation of the postearthquake risk associated with the affected buildings is an essential factor in achieving resilience. This study aims to assess the post-earthquake safety of the damaged reinforced concrete buildings subjected to aftershock hazard based on their probability of collapse. The collapse probability of a damaged building is related to its aftershock fragility characteristics and the aftershock hazard exhibited at the site. Aftershock fragility is evaluated by analyzing the nonlinear response of the building subjected to mainshock-aftershock ground motion sequences. In the collapse fragility analysis, major sources of uncertainty that affect the collapse capacity (e.g. record-to-record variability, material and system uncertainty) of the building, are taken into account. In the proposed method, the aftershock hazard is assessed by a novel approach in which the observed mainshock demand at the site is explicitly considered. This approach is expected to be useful in terms of obtaining more consistent risk evaluations compared to those solely based on the engineering judgment. An example application of the proposed safety assessment approach is presented for a site in Istanbul, Turkey that is assumed to be affected by a scenario earthquake. Resulting collapse probabilities are presented for a set of buildings with different properties. Considered properties are: total number of stories, mainshock damage level, and the mainshock intensity observed at the site.

Original languageEnglish
Title of host publication11th National Conference on Earthquake Engineering 2018, NCEE 2018
Subtitle of host publicationIntegrating Science, Engineering, and Policy
PublisherEarthquake Engineering Research Institute
Pages7489-7499
Number of pages11
ISBN (Electronic)9781510873254
Publication statusPublished - 2018
Event11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018 - Los Angeles, United States
Duration: 25 Jun 201829 Jun 2018

Publication series

Name11th National Conference on Earthquake Engineering 2018, NCEE 2018: Integrating Science, Engineering, and Policy
Volume12

Conference

Conference11th National Conference on Earthquake Engineering 2018: Integrating Science, Engineering, and Policy, NCEE 2018
Country/TerritoryUnited States
CityLos Angeles
Period25/06/1829/06/18

Bibliographical note

Publisher Copyright:
© Copyright 2018 by Earthquake Engineering Research Institute All rights reserved.

Funding

This research is supported and funded by the Scientific and Technological Research Council of Turkey (TUBITAK) for the project Risk of Collapse Based Rating of Damaged Low Rise Reinforced Concrete Frame Buildings Subjected to Aftershock Hazard with project number 213M454. Also, the support by the Istanbul Technical University- National Center for High Performance Computing (UHEM) is acknowledged.

FundersFunder number
TUBITAK213M454
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu
Istanbul Teknik Üniversitesi

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