考虑流固耦合的桥梁桩基地震反应研究现状

State of arts on response of bridge of pile foundation under earthquake excitation

大型桥梁桩基地震反应分析是防灾减灾领域的研究热点之一.为追踪这一课题的研究现状,基于深水桥梁桩基地震反应基本特征,总结其流固耦合、场地效应、行波效应等几个重要特征;概括该课题在这些方面的进展,针对其研究现状,指出考虑流体与桥梁基础的动力耦合作用是这一课题研究的重要研究方向;根据流固耦合问题的求解思路,从耦合算法、耦合面数据传递、流场网格运动控制几个方面总结其常用方法.基于大型桥梁桩基地震反应的特点和流固耦合力学的成果,提出将流固耦合力学研究成果引入该领域是一个重要方向;并给出实现该思路的方法和难点.

The dynamic response of large span bridge of pile foundation under earthquake excitation is one of the latest subjects in the research field of disaster prevention and reduction. To trace the research sta- tus of this subject, several important features of fluid-structure interaction, site effect and traveling wave effect were summarized. The fluid-structure interaction is an important research direction based on state of arts of this subject. And main methods for FSI （fluid-structure-interaction） problems were summarized from coupling method, data transferring way of coupling surface and control of dynamic mesh by solving methods of FSI problems. Finally, research approach was proposed according features of dynamic re- sponse of large span bridge of pile foundation under earthquake excitation and methods of fluid structure interaction mechanics. Also methods and difficulties of this idea were given.