Generalized dynamic amplification coefficient spectrum of ground motion and its characteristics

被引：0
|
作者：
He H. [1 ]
Ding J. [1 ]
Cheng S. [1 ]
机构：
[1] Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 05期
关键词：
Aseismic design; Dynamic amplification coefficient; Ground motion; Response spectrum; Standard deviation spectrum;
D O I：
10.13465/j.cnki.jvs.2021.05.023
中图分类号：
学科分类号：
摘要：
The traditional spectrum of seismic dynamic amplification coefficient is determined according to the maximum acceleration of ground motion and that of structure not fully considering the non-stationarity in time domain. By comparing the occurring time of the maximum response of different periodic structures and that of ground motion peak values, it is verified that ground motion extreme peak values have important actions on structural response. Here, the concept of equivalent dynamic amplification coefficient spectrum considering actions of several extreme ground motion peak values was proposed. The statistical spectrum of different site types was calculated and its conservation was verified. In view of the rationality of the standard deviation spectrum of dynamic amplification coefficient considering the non-stationarity in frequency domain, the correlation statistical spectrum was calculated and its spectral values were confirmed to be higher in the long period duration. Comprehensively considering characteristics of traditional spectrum, equivalent spectrum and standard deviation spectrum, the concept of generalized dynamic amplification coefficient spectrum with sufficient conservation was proposed based on three kinds of spectral outer envelope. The fitting formula for the ratio of generalized dynamic amplification coefficient spectrum to traditional spectrum was established. Through examples, it was verified that structural aseismic design or checking calculation according to the generalized dynamic amplification coefficient spectrum has higher safety. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：170 / 178
页数：8
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