不同环境荷载激励下考虑流固耦合效应的深水桥墩响应分析

摘要

为探讨不同环境荷载组合激励下,动水压力对深水桥墩结构响应的影响程度,本文基于非线性Morision方程,同时考虑附加质量效应和流固耦合效应,对深水桥墩结构在波浪、冰荷载和地震3种环境荷载单独作用下,以及不同组合形式共同作用下的结构响应进行数值分析.计算结果表明:结构各项参数,包括长细比、墩高以及水深都将会对动水压力影响效应产生不同的影响,因此进行深水桥墩设计以及抗震、抗冰分析时,要综合考虑到以上各种影响因素,使深水桥墩地震反应及其抗震、抗冰分析更趋准确合理.%In this paper, based on fluid mechanics principle, to study the dynamic of the pier under three different load action, a FEM model and dynamic equation are established with nonlinear Morison equation. And the Newmark-β method is applied to solve the coupling equation considering both the effect of added mass of water and the coupling effect of fluid and structure. By the numeric analysis, the pier response is studied and compared deeply with different work conditions. The conclusions show that the analytical method is feasible to study the response of deepwater piers,and can provide references for the progress of ice mechanics.