Influences of random phases of artificially synthesized earthquake waves on peak ground acceleration in soil-layer seismic response analysis

2018 3rd International Conference on Insulating Materials, Material Application and Electrical Engineering

材料科学;无线电电子学;电工学

Fang, Yi^1 ; Lv, Yuejun^1 ; Zhang, Lifang^1

Institute of Crustal Dynamics, CEA, Beijing

100085, China^1

关键词: Earthquake wave;    Ground motions;    Peak ground acceleration;    Random-phase;    Seismic response analysis;    Soil layer;    Type II;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/452/2/022109/pdf
DOI  :  10.1088/1757-899X/452/2/022109

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Application of artificially synthesized earthquake waves (ASEWs) is one of the main methods for determining the input ground motion in seismic response analysis at present. The research fit 3,000 earthquake waves of different random phases as the input ground motion at bedrocks. Based on the actual data about the type II sites in Beijing, the influences of random phases of the ASEWs on the peak ground acceleration (PGA) in soil-layer seismic response analysis were analyzed. The results indicated that 1) the PGAs in the soil-layer seismic response analysis of ASEWs were basically normally distributed under ground-motion input of different intensities; 2) as the intensity of ground-motion input increased, the discreteness of PGA caused by random phase of ASEWs became greater; 3) the influences of random phase on the PGA cannot be eliminated until there are more than 6 ASEWs. Moreover, the number of ASEWs needs to be increased at the same time as the intensity of the ground-motion input grows.