大跨度桥梁三维脉动风场的计算机模拟  

Simulation of three-dimensional fluctuating wind field for long-span bridge

作　　者：王灿辉[1] 陈湘亮[2] 李佳[2] 

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《中南公路工程》2007年第3期79-81,共3页Central South Highway Engineering

摘　　要：针对用于大跨度桥梁抖振时域分析的随机风场和Davenport相干函数的特点,采用模拟平稳随机过程的AR法,通过编制相应的Matlab程序,获得了大跨度桥梁三维脉动风场。以某跨度为800 m的大桥为例,进行了三维脉动风场的模拟,并对模拟得出的样本进行检验,结果表明模拟值与目标值吻合良好,可以用于大跨度桥梁的风场模拟。According to the features of the stochastic wind field on long-span bridges and the Davenport coherence function, AR method is taken to simulate three-dimensional fluctuating wind field with Matlab. According to this method, a stochastic wind field of a bridge with a span of 800m is simulated and the simulated wind field is checked. The results show that the simulated values are well identical with the target values. This method can be used for simulation of three-dimensional fluctuating wind field on long-span bridges.

关 键 词：大跨桥梁 三维脉动风场 计算机模拟 AR模型 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]