张靖皋长江大桥常态风速概率模型研究  

Research on the Probabilistic Model of Normal Wind Speed for Zhang-Jing-gao Bridge

作　　者：余军 陈南西 刘高 马如进[2] YU Jun;CHEN Nan-xi;LIU Gao;MA Ru-jin(CCCC Second Highway Consultants Co.Ltd.,Wuhan 430056,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100088,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉市430056 [2]同济大学土木工程学院,上海市200092 [3]中交公路长大桥建设国家工程研究中心有限公司,北京市100088

出　　处：《公路》2023年第6期74-82,共9页Highway

基　　金：中国交通建设集团有限公司科技项目,项目编号YSZX-01-2021-01-B。

摘　　要：对于超大跨度悬索桥,其结构的刚度和阻尼很低,对风作用非常敏感,因此,风荷载是超大跨度悬索桥设计的控制荷载之一。现有研究大多集中于优化极值风速概率模型,为确保张靖皋长江大桥在风荷载作用下的行车安全性及舒适性,需对张靖皋长江大桥的常态风速进行深入探索。首先选取了桥址周边3个国家气象观测站(无锡站、泰州站、昆山站)的长年风速,根据三角网线性插值重建了张靖皋长江大桥桥址处的长年常态风速序列。其次对2014年苏通大桥与邻近气象站的同步观测数据进行相关性分析并建立线性换算关系,从而构建苏通大桥长年常态风速序列。最后根据张靖皋长江大桥桥址处的常态风速与苏通大桥桥位处的常态风速序列,建立两桥位之间的风速模型换算关系,得到张靖皋长江大桥的常态风速概率模型。For super long-span suspension bridges,the structure has very low stiffness and damping and is quite sensitive to wind effect,therefore wind load is one of the controlling loads for the design of super long-span suspension bridges.Most of the existing studies have focused on optimizing the extreme wind speed probabilistic model.To ensure the driving safety and comfort of the Zhang-Jing-gao Bridge under wind loads,the normal wind speed of the Bridge needs to be explored in depth.In this study,the long-term wind speed from three national meteorological stations(Wuxi,Taizhou,and Kunshan)around the bridge site is firstly selected to reconstruct that at the Bridge site based on triangular mesh linear interpolation.Secondly,a correlation analysis is carried out between the synchronous observation data of the Sutong Bridge and the neighboring meteorological stations in 2014,and a linear conversion relationship is established to reconstruct the long-term normal wind speed sequence for the Sutong Bridge.Finally,based on the normal wind speed sequence at the Bridge site and that at Sutong bridge site,a wind speed model conversion relationship between the two bridge sites is established to obtain the normal wind speed probability model for the Bridge.

关 键 词：桥梁工程 悬索桥 常态风速概率模型 三角网插值 相关性分析 

分 类 号：U442.59[建筑科学—桥梁与隧道工程] U448.25[交通运输工程—道路与铁道工程]