桩土效应对高铁桥梁地震反应的影响分析  

The influence analysis of the effect of pile-soil contact on the seismic response of the high speed railway bridge

作　　者：江博君 冼巧玲[1] 周福霖[1] 

机构地区：[1]广州大学减震控制与结构安全国家重点实验室(培育),广东广州510405

出　　处：《广州大学学报（自然科学版）》2016年第1期57-63,共7页Journal of Guangzhou University:Natural Science Edition

基　　金：国家自然科学基金联合基金重点资助项目(U1334209);长江学者和创新团队发展计划资助项目(IRT13057);国家重点基础研究发展计划资助项目(2011CB013606)

摘　　要：高速铁路桥梁的刚度远大于普通桥梁,当强烈地震发生时,桥梁的地震反应尤其是桥梁梁端的碰撞反应值得关注.另一方面,对于深厚软土地区,土与结构之间的相互作用不能被忽略.文章对比考虑与不考虑桩土相互作用效应,分析高铁桥梁在地震激励下的反应.分析结果表明:考虑桩土相互作用效应会使桥梁结构的自振周期延长、墩顶位移和加速度反应增大,但伸缩缝处的碰撞反应却减小.The stiffness of the high speed railway bridge is much larger than that of the ordinary bridge. The seismic response of the high speed railway bridge under the strong earthquake, especially the pounding response of the bridge beam end should be considered. On the other hand, for the deep soft soil area, the effect of pile- soil contact can not be ignored. In this paper, the seismic response of the high speed railway bridge on consid- ering and not considering the effect of pile-soil contact have been analyzed and compared. The results indicate that after considering the interaction of pile and soil, the natural vibration periods of the bridge became longer, the seismic displacement and acceleration response of the bridge piers increased, hut the seismic pounding re- sponse of the expansion joints decreased.

关 键 词：高速铁路桥梁 桩土相互作用 地震反应 碰撞反应 

分 类 号：TU311.3[建筑科学—结构工程]