作　　者： (刘旭政）; (赵军）; (王鹏）;

机构地区： 华东交通大学土木建筑工程学院,江西南昌330013

出　　处： 《广西大学学报（自然科学版）》 2017年第4期1519-1525,共7页

摘　　要： 为了研究动水压力对高承台桩基桥梁地震响应的影响,通过附加质量考虑动水压力效应。桩基附加质量用Morison方程求解,承台附加质量应用速度势理论求解。最后利用Midas/Civil软件建立了千岛湖大桥有限元模型,通过有限元模型分析动水压力对高承台桩基桥梁地震反应的影响。分析结果表明:动水压力的存在会降低桥梁的自振频率;动水压力的存会使桩基地震响应增大。因此,在高承台桩基桥梁的抗震设计中考虑动水压力变得十分必要。 The added mass method is adopted to calculate the influence of dynamic water pressure on high-rise pile caps under earthquake. Morison equation is applied to account for the added mass of pile foundation,and the theory of velocity potential is used to consider the added mass of pile caps. Based on the finite element software Midas/Civil,a finite element model for the bridge of Qiandao lake is established. Analysis results indicate that the dynamic water pressure can reduce the natural frequency of the bridge; that dynamic water pressure will enhance the seismic response of the pile foundation. It is crucial that the effect of hydrodynamic pressure on elevated pile caps should be taken into account in seismic design.

关 键 词： 动水压力 地震反应 附加质量 方程