多点多维地震激励大型渡槽隔震地震响应研究  

Study on Dynamic Response of Long-span Isolation Aqueduct under the Multidimensional and Multi-point Earthquake

作　　者：雷永勤[1,2] 杜永峰[1,2] 

机构地区：[1]西部土木工程防灾减震研究中心,甘肃兰州730050 [2]兰州理工大学防震减震研究所,甘肃兰州730050

出　　处：《建筑科学》2014年第9期78-83,共6页Building Science

摘　　要：本文对大跨隔震渡槽在多维多点地震激励下的动力行为进行研究,重点探讨了地震动空间效应对渡槽槽墩墩底弯矩、墩底剪力和槽身位移的影响。结果表明:隔震能有效减小渡槽槽墩的墩底弯矩和墩底剪力及调节渡槽槽身惯性力在各渡槽槽墩之间的分配;渡槽采用隔震后,地震波的空间效应对渡槽结构动力响应的影响较大程度的降低,并可达到工程设计可接受的范围内,在计算隔震渡槽结构响应时可不考虑地震波空间效应的影响。The dynamic behavior of long-span isolation aqueduct under the multi-dimensional and multi-point earthquake is studied. The seismic oscillation spatial effect and its effect on the bending moment, shearing force of aqueduct pier bottom and on the displacement of aqueduct body are mainly discussed. The study result shows that isolation can effectively reduce the bending moment, shearing force and adjust the distribution of inertia force for the aqueduct body between aqueduct piers, on the other hand, the influence of seismic wave spatial effect on the aqueduct structure dynamic response will be greatly reduced after isolation is applied to the aqueduct and such influence will fall into the acceptable scope within the engineering design. Influence of the seismic wave spatial effect may not be considered in calculating shock insulation aqueduct structure response.

关 键 词：大型渡槽 隔震 地震响应 多点激励 

分 类 号：TU352.1[建筑科学—结构工程]