余震
序列(生物学)
地质学
谱线
强地震动
刚度
地震学
地震动
结构工程
物理
工程类
化学
天文
生物化学
作者
Changhai Zhai,Wen Wang,Zhi Qiang Chen,Shuang Li,Lili Xie
标识
DOI:10.1016/j.soildyn.2012.10.001
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI