复杂介质对地震波传播的影响  

The effect of complex media on seismic wave propagation

作　　者：景立平[1] 卓旭炀[2] 王祥建[2] 

机构地区：[1]北京交通大学土木工程学院,北京100044 [2]中国地震局工程力学研究所,黑龙江哈尔滨150080

出　　处：《岩土工程学报》2005年第4期393-397,共5页Chinese Journal of Geotechnical Engineering

基　　金：地震学联合基金课题(102030);中国地震局十五项目资助课题

摘　　要：本文基于两相介质动力学方程组,利用显式集中质量有限元结合透射人工边界,研究了水平自由场地单相土、欠饱和土和饱和土及不同模量的土层排列结构对地震波传播的影响。结果表明介质的性质对P 波传播有明显的影响;而土层结构对SV 波传播有明显影响。同时,本文还研究了横向不均匀场地地震反应,结果进一步表明,仅用一维模型研究横向不均匀场地会引起较大误差。In this article, the author analyses the effect of media of the one-phase soil, unsaturated soil, saturated soil and soil layers structure with different modulus on seismic wave propagation, using dynanoic differential equations of two-phase media, and explicit finite element lumped-mass method with artificial transmitting boundary. It is shown that the character of media play an important role in P-wave propagation while the structure of soil layers has obvious effect on SV wave propagation. In the end, the author also illustrates that if the soil is laterally to unhomogeneous, the 1-D analysis would conduce to considerable error.

关 键 词：土层结构 地震波传播 饱和土 欠饱和土 

分 类 号：TU411.3[建筑科学—岩土工程]