Aftershock resilience evaluation of mainshock-damaged reinforced concrete frame structures

被引：0

作者：

Zhou Z. ^{[1
,2
]}

Yu X. ^{[3
]}

Han M. ^{[2
]}

Lü D. ^{[4
]}

Luo K. ^{[5
]}

Wang J. ^{[6
]}

机构：

[1] National-Local Joint Laboratory of Engineering Technology for Long-Term Performance Enhancement of Bridges in Southern District, Changsha University of Science & Technology, Changsha

[2] Multi-Functional Shaking Tables Laboratory, Beijing University of Civil Engineering and Architecture, Beijing

[3] College of Civil Engineering and Architecture, Guilin University of Technology, Guilin

[4] Key Lab of Structure Dynamic Behavior and Control of China Ministry of Education, Harbin Institute of Technology, Harbin

[5] China Academy of Building Research, Beijing

[6] China National Machinery Industry Co., Ltd, Beijing

来源：

Jianzhu Jiegou Xuebao/Journal of Building Structures | 2024年 / 45卷 / 07期

关键词：

aftershock fragility; damaged structure; mainshock-aftershock; seismic resilience; state-dependent;

D O I：

10.14006/j.jzjgxb.2023.0244

中图分类号：

学科分类号：

摘要：

In order to evaluate the seismic resilience of a damaged structure for aftershock excitations, a framework of seismic resilience assessment for damaged structures, which was dependent on the mainshock damage states, was developed in this study. The framework was divided into four parts, namely, the selection of mainshock-aftershock sequences, aftershock fragility analysis, the computation of repair time and the determination of the recovery function. For the above-mentioned four parts, the conditional mean spectrum of mainshock and aftershock, the damage-dependent aftershock fragility function based on Logistic regression method, GB / T 38591—2020 ‘Standard for seismic resilience assessment of buildings’ and the characteristic of social resources and rescue capacity were employed to solve the four issues. In order to verify the proposed framework, a seismic-designed RC frame was selected as the case example for the resilience evaluation. The results show that with the increasing of structural damage, the aftershock economic loss of the structure is obviously increasing, and the resilience of the damaged structure is significantly decreased. When the mainshock-induced damage reaches the severe damage state, the decrease rate of structural resilience can be up to 41%, and the increment of economic loss can be as much as 10 times of that of the undamaged structure. There is a nonlinear reduction for the seismic performance when the mainshock damage occurs. Therefore, it is necessary to account for the influence of the current structural damage state in the resilience assessment of a structure. © 2024 Science Press. All rights reserved.

引用

页码：143 / 152

页数：9

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