润扬长江大桥北汊斜拉桥风流场数值模拟及压力分布特性研究  

Numerical Simulation of Wind Flow Field and Pressure Distribution Characteristics of North Branch Cable-Stayed Bridge of Runyang Yangtze River Bridge

作　　者：杜昕 DU Xin(China Design Group Co.Ltd.,Nanjing 210000,China)

机构地区：[1]中设设计集团股份有限公司

出　　处：《重庆理工大学学报（自然科学）》2019年第6期77-83,共7页Journal of Chongqing University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(50579041);国家“十二五”科技支撑计划项目(2012BAB05B03)

摘　　要：针对斜拉桥受风荷载影响较大的情况,为研究斜拉桥风压分布特性并且给润扬长江大桥北汊斜拉桥的安全运营提供数据支撑,借助FLUENT流体计算软件,并基于实测风况资料建立了实例工程的三维风流场数值模型,采取了桥面、桥塔最大风速下,风攻角分别为-5°、-3°、0°、3°、5°共5组工况,对实例工程的桥塔整体受压特性、桥梁断面风压力分布及风流场特性进行了研究。Aiming at the fact that cable-stayed bridges usually being largely influenced by wind load,the article studies the distribution characteristics of wind pressure on cable-stayed bridges,which also provides database for the operation safety of the north branch cable-stayed bridge of Runyang Yangtze River Bridge.The article made use of computational fluid software FLUENT to build three-dimensional airflow field model of engineering projects,based on measured wind data.The article conducted detailed studies on overall compressive characteristics of bridge tower,wind pressure distributions on bridge cross section and airflow field characteristics of engineering projects,under five conditions of wind angles being -5°,-3°,0°,3°,5°with maximum wind speed on bridge deck and bridge tower.

关 键 词：斜拉桥 风流场特性 风压力分布 数值模拟 

分 类 号：TV143[水利工程—水力学及河流动力学]