Rayleigh波作用下地下结构地震反应影响分析  

Influence analysis on seismic response of underground structures under propagation of rayleigh waves

作　　者：刘晶波[1] 王文晖[1] 刘祥庆[1] 赵冬冬[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《振动与冲击》2013年第16期95-99,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金重大研究计划项目(90715035);国家973项目(2011CB013602);北京市自然科学基金重点项目(8061003)

摘　　要：采用基于时域粘弹性人工边界的Rayleigh波输入方法,进行了土-地下结构相互作用体系在Rayleigh波作用下的动力时程反应分析,对Rayleigh波作用下地下结构的地震反应特性进行研究。重点讨论了地下结构材料强度、结构厚度以及土层刚度等因素对Rayleigh波作用下地下结构地震反应的影响。结果表明Rayleigh波对浅埋地下结构的地震动力反应影响显著,将使结构产生较大的内力与变形,在地下结构抗震设计尤其是浅埋地下结构的抗震设计时应予以足够的重视。The dynamic time history analysis of soil-structure systems under propagation of Rayleigh waves was carried out by using the Rayleigh wave input method based on viscous-spring artificial boundary,and the seismic response of underground structures under propagation of Rayleigh waves was studied.The influences of structure material strength,structure thickness and soil stiffness were investigated in detail.Numerical analysis results show the large effect of Rayleigh wave on the dynamic response of shallow underground structures.The internal force and deformation caused by Rayleigh wave are significant,so the influences should be taken into account in seismic design of underground structures.

关 键 词：地下结构 RAYLEIGH波 地震反应 土-结构相互作用 

分 类 号：O347[理学—固体力学] P315[理学—力学]