An investigation on the ground motion parameters and seismic response of underground structures

被引：0

作者：

Hamid Reza Nejati ^{[1
]}

Morteza Ahmadi ^{[1
]}

Hamid Hashemolhosseini ^{[2
]}

机构：

[1] Rock Mechanics Department, School of Engineering, Tarbiat Modares University, Tehran 14117-13116, Iran

[2] Mining Engineering Department, Isfahan University of Technology, Isfahan 84156-83111, Iran

来源：

Earthquake Science | 2012年 / 25卷 / 03期

关键词：

ground motion parameter; load frequency; PGA; dynamic analysis; wave attenuation;

D O I：

暂无

中图分类号：

P631.4 [地震勘探];

学科分类号：

0818 ; 081801 ; 081802 ;

摘要：

Peak ground acceleration (PGA), frequency content and time duration are three fundamental parameters of seismic loading. This study focuses on the seismic load frequency and its effect on the underground structures. Eight accelerograms regarding di?erent occurred earthquakes that are scaled to an identical PGA and variation of ground motion parameters with ratio of peak ground velocity (PGV) to PGA, as a parameter related to the load frequency, are considered. Then, concrete lining response of a circular tunnel under various seismic conditions is evaluated analytically. In the next, seismic response of underground structure is assessed numerically using two different time histories. Finally, effects of incident load frequency and frequency ratio on the dynamic damping of geotechnical materials are discussed. Result of analyses show that specific energy of seismic loading with identical PGA is related to the seismic load frequency. Furthermore, incident load frequency and natural frequency of a system have influence on the wave attenuation and dynamic damping of the system.

引用

页码：253 / 261

页数：9

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