洪水期紊流与桥梁临时结构流固耦合效应分析

Analysis on Turbulent Flow of Flood Period and Fluid-solid Coupling Effect of Temporary Bridge Structure

以长联大跨桥梁施工期间临时栈桥钢管桩基础为研究对象,利用空间有限元程序ANSYS,分析了钢管桩在洪水期深水状态下的流固耦合效应,比较了洪水期水流对结构振动特性的影响,并通过谐响应分析模块计算了可能引起结构共振的频率范围,最后提出了相关构造措施,实现了对紊流与桥梁临时结构的振动控制,保证了洪水期桥梁临时结构的安全性。

As the study object of the steel pipe pile foundation of the temporary landing stage during the construction of long-span bridge,the spatial finite element program ANSYS is used to analyze the fluid-soo8d coupling effect of steel pipe pile at the deep water state of flood period and compare the influence of water flow in flood period on the vibration characteristic of structure.The harmonic response analysis module is used to calculate the frequency range possibly to cause the structure resonance.Finally,the article puts ward the relative construction measures to realize the vibration control of turbulent flow and temporary bridge structure and guarantee the security of temporary bridge structure in flood period.