地震动水压力对深水桥墩的影响  

Hydrodynamic Effect on Seismic Response of Bridge Pier in Deep Water

作　　者：高学奎[1] 朱晞[1] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044

出　　处：《北京交通大学学报》2006年第1期55-58,共4页JOURNAL OF BEIJING JIAOTONG UNIVERSITY

基　　金：国家自然科学基金资助项目(50278002)

摘　　要：在Morison方程的基础上,用附加质量考虑水的影响,采用有限元方法来分析深水桥墩的地震响应.通过对实例的分析,认为地震动水压力对深水桥墩的影响是显著的,动水压力的作用使桥墩的地震响应最大值增大了近50%,并得出了影响动水压力的主要因素.同时与我国现行抗震规范的计算结果进行了比较分析,认为在抗震设计中是否考虑地震动水压力对桥墩的影响采用相对水深来决定更为合理.Based on the Morison equation, the finite element method is used to analyze the seismic responses of bridge pier in deep water, and the water is considered as the added mass. An actual bridge pier is analyzed, the results show that the effect of hydrodynamic pressure to seismic responses of bridge pier is notable, and the seismic response may be changed by 50%, the main factors that may af- fect the hydrodynamic pressure are obtained. Another method according to the seismic design codes also used to analyze the pier, the results are compared, it shows that when decided whether considering the effect of hydrodynamic pressure or not, it may be more suitable to use the relative depth of water in the seismic design.

关 键 词：水-结构相互作用 Morison方程 有限元方法 地震反应 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]