Damage spectra for the mainshock-aftershock sequence-type ground motions

被引：95
作者：
Zhai, Chang-Hai [1 ]
Wen, Wei-Ping [1 ]
Chen, ZhiQiang [2 ]
Li, Shuang [1 ]
Xie, Li-Li [1 ,3 ]
机构：
[1] Harbin Inst Technol, Sch Civil Engn, Harbin 150090, Peoples R China
[2] Univ Missouri, Dept Civil & Mech Engn, Kansas City, MO 64110 USA
[3] China Earthquake Adm, Inst Engn Mech, Harbin 150080, Peoples R China
来源：
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING | 2013年 / 45卷
基金：
中国国家自然科学基金;
关键词：
Damage spectra; Mainshock-aftershock sequence-type ground motions; Seismic sequence; Damage index; STEEL FRAME BUILDINGS; SEISMIC DAMAGE; PERFORMANCE EVALUATION; MULTIPLE; BEHAVIOR; DESIGN;
D O I：
10.1016/j.soildyn.2012.10.001
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
Strong aftershocks have the potential to increase the damage state of the structures due to the damage accumulation. This paper investigates the damage spectra for the mainshock-aftershock sequence-type ground motions with Park-Ang damage index. A method of simulating the mainshock-aftershock sequence-type ground motions is proposed based on the modified form of Bath's law and NGA ground motion prediction equation. The damage spectra are computed using the recorded and simulated sequence-type ground motions, and the effects of period of vibration, strength reduction factor, site condition, seismic sequence, damping ratio and post-yield stiffness on damage spectra are studied statistically. The results indicate that the effect of aftershock on structural damage is significant and recorded sequence-type ground motions may underestimate the damage of long-period structures due to the incompleteness of dataset. A simplified equation is proposed to facilitate the application of damage spectra in the seismic practice for mainshock-aftershock sequence-type ground motions. (C) 2012 Elsevier Ltd. All rights reserved.
引用
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页码：1 / 12
页数：12
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