地震工程学报2016，Vol.38Issue(6)：935-941,7.DOI:10.3969/j.issn.1000-0844.2016.06.0935
硬夹层埋深对场地地震动参数的影响
Influence of the Buried Depth of Hard Interlayer on Ground-motion Parameters
摘要
Abstract
Ground motion characteristics are seriously influenced by local site conditions,and in recent years,one of the hot spots in the field of earthquake engineering has been the impact of a hard site interlayer on ground motion characteristics.This paper selects the thickness,shear-wave velocity,density,and other actual exploration data from borehole A3 in a certain project site by changing the buried depth of the hard interlayer to analyze the influence of depth and different seismic time history data on ground motion parameters.In this paper,a one-dimensional seismic response analysis of a typical site with a hard interlayer was conducted by using the time domain nonlinear method.Research has shown that when the thickness of the hard interlayer and the total thickness of the model remain invariable,the surface horizontal peak-ground acceleration increased with the buried depth of the hard interlayer,but its amplification reduced gradually, until it was no longer affected when the hard interlayer's buried depth reached a certain value. Furthermore,as the buried depth increased,the values of the response spectrum generally increased.From the surface Fourier spectrum diagram,we found the spectrum values were small and flat in the range of 0~0.2 Hz,and then increased gradually to a range of 0.2 ~1 Hz.Spec-trum values peaked and then reduced again in the range of 1 ~ 1.5 Hz.Spectrum values hit the second peak in the range of 1.5~5 Hz,and then dropped down after 5 Hz.For the Fourier spec-trum at different buried depths,spectrum values didn't change much in the range of 0 ~ 1 Hz. These results will provide an important reference for the seismic design of deep foundation pit engineering such as nuclear power station and underground engineering.关键词
埋深/地震动/峰值加速度/反应谱Key words
buried depth/ground motion/peak acceleration/response spectrum分类
天文与地球科学引用本文复制引用
张海,李克强,尤红兵,周泽辉..硬夹层埋深对场地地震动参数的影响[J].地震工程学报,2016,38(6):935-941,7.基金项目
国家自然科学基金项目(51248004) （51248004）
天津市应用基础与前沿技术研究计划(13JCQNJC07400) （13JCQNJC07400）
天津市高校中青年骨干创新人才培养计划 （）
天津市“131”创新型人才培养工程人选 （）
