Ground barrier sy stem for isolating vibration is a geotechnical engineering method used to impede or change wave propagating into protected zone. Because limited research on mechanism of the barrier, the failures of the barrier occur sometime in prectice. In this paper the theoretical analysis of soil and barrier system for isolating vibration is presented, in which the barrier is assumed to be an elastic plate of medium thickness embedded in elastic soil; and the thin layer method (TLM) is employed to examine dynamic response of the plate and ground vibration in protected zone under an incident wave. Some key parameters that influence the effect of barrier for isolating vibration are analyzed. A phenomenon of the wave completely thransmiting through the barrier and causing failur of the barrier is found, and a circular frequency of the complete wave transmission is defined to explain this phenomenon. The theoretical result shows that the complete wave transmission occurs more easily in flexible barrier system than in rigid one. At the end the recommendation for improving barrier design to avoid failure is presented.
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邱畅,高广运,岳中琦,谭国焕.屏障隔振系统失效机理的探讨[J].地震工程学报,2003,25(3):198-203. QIU Chang, GAO Guang-yun, YUE Zhong-qi, THAN Guo-huan. RESEARCH ON THE FAILURE MECHANISM OF BARRIER FOR ISOLATING VIBRATION[J]. China Earthquake Engineering Journal,2003,25(3):198-203.