连续刚构桥主梁气动特性数值分析  

Numerical Simulation for Aerodynamic Characteristics of Continuous Rigid Frame Bridges

作　　者：李素杰[1,2] 彭元诚[3] 龙晓鸿[1,2] 曹化锦[1,2] 

机构地区：[1]华中科技大学土木工程与力学学院,湖北武汉430074 [2]华中科技大学控制结构湖北省重点实验室,湖北武汉430074 [3]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《土木工程与管理学报》2011年第3期156-159,共4页Journal of Civil Engineering and Management

基　　金：中央高校基本科研业务费专项资金(2011QN181);贵州省交通厅科技项目资助

摘　　要：基于流体动力学软件,采用二维圆柱绕流的计算方法,对连续刚构主梁截面进行了仿真分析。首先进行了网格划分方案的比选,将数值模拟结果与风洞实验结果进行对比,进而验证了本文模型以及计算方法的正确性。然后研究了不同风向角作用下,双幅桥上下游梁截面的气动特性,并与单幅桥梁截面气动特性进行对比,得到了双幅桥梁截面气动系数干扰因子,对于研究双幅桥梁截面的气动特性具有重要的意义。Bas-ed on the computational fluid dynamics（CFD）,t he method of a two-dimensional cylinder surrounded by unsteady wind flow was usin g to solve the beam cross-section of the Continuous rigid bridge.First,the me shing schemes are compared and optimized.The numerical simulation results are c ompared with wind tunnel tests results to verify the validity of the models and calculation method.Then the aerodynamic characteristics of upstream and downstr eam beam sections of double-width bridges under different attack angles are inv estigated,and compared with the aerodynamic characteristics of single bridge se ctions.And the coefficients of aerodynamic interference factor are obtained.Th e work turns out to be very important to the research of aerodynamic characteris tics of upstream and downstream beam sections of double-width bridges.

关 键 词：连续刚构 数值模拟 风动试验 气动干扰 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]