动水压力作用下深水桥墩非线性地震响应分析

Nonlinear Seismic Response Analysis of Bridge Pier in Deep Water under Hydrodynamic Pressure Influence

为研究动水压力作用对深水桥墩地震响应的影响,本文分别采用Morison方程和辐射波浪理论建立了动水压力计算方法,分析了动水压力作用对桥墩地震响应的影响;同时分析了考虑材料非线性时动水压力作用对桥墩地震响应的影响。研究表明:动水压力作用增大了桥墩的地震响应,其影响随着相对水深的增加而增强;考虑材料非线性时动水压力对桥墩地震响应的影响,相对线性材料而言有所变化。

The influence of hydrodynamic pressure on seismic response of bridge pier is studied basing on Morison equation and radiation wave theory.In addition,infiuence of hydrodynamic pressure on seismic response of a pier with nonlinear material is analyzed.The results indicate that：seismic response of pier is augmented because of hydrodynamic pressure effect,and this effect on seismic response of pier becomes more significant with the increase of the relative water depth.The action of hydrodynamic pressure about pier with nonlinear material will be differece from pier with the linear material.