地震工程学报Issue(3)：441-445,5.DOI:10.3969/j.issn.1000-0844.2014.03.0441
软夹层和硬夹层对地表地震动特性的影响
Effects of Soft and Hard Interlayers on Ground Motion Characteristics
摘要
Abstract
The program for one-dimensional equivalent linear soil seismic response is verified u-sing the underground and surface seismic records of the KiK network in Japan.The results show that,in the range of small soil deformations,the calculated ground motions are consistent with the actual motions for the sites where the stiffness of soil layers increase with depth,but not for the sites with soft or hard interlayers.Accordingly,this paper presents a method to study the effects of soft and hard interlayers on ground motions.As a reference,the interlayer is replaced by a nor-mal soil layer to meet the condition of increasing stiffness.Then,the surface seismic response ex-cited by the actual underground motions is computed using the program.Comparing the computed motions and the actual motions on the surface,conclusions can be drawn.Some representative sites are studied in this paper.The results show that the effects of soft and hard interlayers on ground motions are consistent;there is an amplification of high-frequency motions if the interlayer is shallow,but there is an action of seismic isolation to high-frequency motions if the interlayer is deep.关键词
软夹层/硬夹层/地震动/高频/隔震Key words
soft interlayer/hard interlayer/ground motion/higher frequency/seismic isolation分类
天文与地球科学引用本文复制引用
李恒,张静波,吴建超..软夹层和硬夹层对地表地震动特性的影响[J].地震工程学报,2014,(3):441-445,5.基金项目
国家自然科学基金项目(41004020) （41004020）
中国地震局地震研究所所长基金项目(IS200926044) （IS200926044）
