广东江顺大桥抗风性能试验研究  

Experimental Investigation of the Wind-Resistant Performance of Jiang-Shun Bridge in Guangdong

作　　者：刘志文[1] 洪涵[1] 梁立农 万志勇 薛亚飞[1] 陈政清[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]广东省公路勘察规划设计院股份有限公司,广东广州510507

出　　处：《湖南大学学报（自然科学版）》2015年第3期112-119,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51178181);湖南省高校创新平台开放基金项目(11K015);长安大学中央高校科研业务费基础研究计划科研平台开放基金项目~~

摘　　要：采用风洞试验和CFD数值模拟相结合的方法对主跨700m的广东江顺大桥主桥结构抗风性能进行研究,包括主梁、桥塔气动参数试验与CFD模拟、主梁1/60几何缩尺比节段模型测振试验、主梁1/25几何缩尺比节段模型涡振试验、全桥气弹模型试验研究等.结果表明:该桥在成桥状态和施工状态具有足够的抗风稳定性,在设计风速下涡振性能和抖振响应性能均满足规范要求;大比例主梁节段模型得到的涡振振幅小于常规比例节段模型得到的涡振振幅,表明采用常规比例模型进行桥梁主梁涡振性能评估是偏于保守的.The wind-resistant performance of Jiang-shun Bridge in Guangdong,a cable-stayed bridge with a main span of 700 meters,was investigated by means of wind tunnel tests and computational fluid dynamics method（CFD）.The experiments and numerical simulations of the aerodynamic parameters of the main deck and pylon,the wind-induced vibration experiments of the main deck with a sectional model with a geometry scale of 1to 60,the vortex-induced vibrations（VIV）experiments of the main deck with sectional model with geometry scale of 1to 25,and the wind tunnel tests of the full bridge aero-elastic model were conducted.The research results have shown that the aerodynamic stability of the bridge during the construction stage or in-service stage is sufficient.The performance of VIV and buffet response under the design wind speed satisfies the demand of the code of wind-resistant design of highway bridges.The VIV amplitudes of the main deck from the section model with geometry scale of 1to 25 are less than that of the main deck from the section model with a geometry scale of 1to 60,which indicates that it is conservative to assess the VIV performance of the bridge deck with a section model of conventional scale section.

关 键 词：斜拉桥 风洞试验 计算流体动力学 抗风性能 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]