基于CFD的分离式三箱主梁气动优化研究  

Aerodynamic optimization of three-box-girder deck by CFD method

作　　者：李永乐[1] 安伟胜[1,2] 李翠娟[1] 廖海黎[1] 

机构地区：[1]西南交通大学,四川成都610031 [2]河北省交通规划设计院,河北石家庄050011

出　　处：《土木工程学报》2013年第1期61-68,共8页China Civil Engineering Journal

基　　金：国家863计划(2008AA11Z101);四川省杰出青年学科带头人计划(2009-15-406);中央高校基本科研业务费专项资金(SWJTU10ZT01)

摘　　要：超大跨度桥梁对风的作用较为敏感,抗风性能已成为超大跨度桥梁设计的控制性因素。分离三箱主梁是超大跨度桥梁典型的主梁断面形式,但针对分离三箱主梁的气动性能的研究较为少见。针对分离三箱主梁,设计了6种不同气动措施,通过对比不同气动措施情况下桥梁的静风稳定性能和颤振稳定性能,讨论各气动措施设置对分离三箱主梁气动特性的影响,并提出气动措施设置方法的建议,研究结论对超大跨度桥梁气动优化具有指导意义。Super-long-span bridges are sensitive to natural winds. Wind-resistant performance is the control factor in the design of super-long-span bridges. The three-box-girder deck is typical form for tile super-long-span bridge. However, little research results on aerodynamic characteristics of three-box-girder deck are published. Six kinds of aerodynamic measures are designed for the three-box-girder deck. The aerostatic stability and the flutter stability are compared to study the effects of different aerodynamic measures on the aerodynamic characteristics of the three-box-girder deck. And suggestions about aerodynamic measures arrangement methods are presented which can rovide references for aerodynamic optimization of super-long-span bridges.

关 键 词：超大跨度桥梁 气动特性 气动措施 静风稳定性 颤振稳定性 

分 类 号：U442.59[建筑科学—桥梁与隧道工程]