Rayleigh波作用下地下结构的动力反应分析  

DYNAMIC RESPONSE ANALYSIS OF UNDERGROUND STRUCTURES DURING PROPAGATION OF RAYLEIGH WAVES

作　　者：刘晶波[1] 李彬[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工程力学》2006年第10期132-135,131,共5页Engineering Mechanics

基　　金：国家自然科学基金(50478014);国家973项目(2002CB412706);北京市自然科学基金重点项目(8061003)

摘　　要：基于粘弹性人工边界提出了Rayleigh波的时域波动输入方法,在此基础上研究了Rayleigh波作用下地下隧道的动力反应特性,重点研究了埋深对结构动力反应的影响。结果表明提出的波动输入方法具有良好的模拟精度;Rayleigh波对浅埋地下结构的动力反应影响显著;存在临界埋深D0,当结构埋深D>D0时,随着埋深的增加,结构动力反应逐渐减小;当D<D0时,结构动力反应和埋深的关系与入射Rayleigh波的波形有关。此外还简要介绍了核试验中地下结构破坏与埋深的关系,结果表明计算与核试验观测符合良好。Rayleigh wave input method is proposed based on Viscous-Spring Boundaries. The dynamic response of a tunnel during propagation of Rayleigh wave is studied using the proposed method, and the influence of depth is investigated in detail. Numerical analysis results show good accuracy of the wave motion input method and large effect of Rayleigh wave on the dynamic response of shallow underground structures. If structural depth D is larger than a critical depth Do, the influence of Rayleigh wave on dynamic response will reduce with the increase in burial depth; otherwise the influence is governed by the property of Rayleigh wave. The influence of depth on underground structures in nuclear explosion tests is briefly introduced, the results of which show good agreement with the analyzed ones using the proposed method.

关 键 词：地下结构 人工边界 波动输入 土-结构动力相互作用 时程分析 核试验 

分 类 号：TU311.3[建筑科学—结构工程]