空腹式连续刚构桥设计参数的正交试验研究  

Study of Orthogonal Test for Design Parameters of Open-Web Continuous Rigid-Frame Bridge

作　　者：宋恒扬 胡俊[2] 彭元诚[3] 

机构地区：[1]四川省交通运输厅公路规划勘察设计研究院,四川成都610041 [2]重庆交通大学,重庆400074 [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：《世界桥梁》2015年第1期55-58,共4页World Bridges

基　　金：山区桥梁与隧道工程国家重点实验室培育基地(重庆交通大学)开放基金项目(CQSLBF-Y13-7)

摘　　要：为研究空腹式连续刚构桥结构设计参数的优化,以某主跨290m的空腹式连续刚构桥为背景工程,通过有限元分析软件建立其结构模型,采用正交试验方法,研究空腹段梁底曲线幂次、下弦梁高以及根部梁高等设计参数取值对结构经济性的影响。结果表明:空腹段梁底曲线幂次对结构经济性影响显著,且根部梁高取主跨跨径的1/8、梁底曲线幂次取2.75、下弦梁高取主跨跨径的1/50为最优的结构设计参数。To study the optimization of structural design parameters of open‐web continuous rigid‐frame bridge .an open‐web continuous rigid‐frame bridge with a main span of 290 m is taken as the study background .The structural model of the bridge was established using the finite ele‐ment analytical software .The orthogonal test method was adopted to study the influence of de‐signed values of certain parameters on the economic performance of the structure ,such as the given power of the base curve of the open‐web girder section ,the lower chord girder depth and girder depth over the pier top .T he results of the study indicate that the pow er of base curve of open‐w eb girder section has significant influence on the economic performance of the structure .It is sugges‐ted that the girder depth measured from the top of the pier take the 1/8 of the main span length , the power of the girder base curve be 2 .75 ,and the lower chord girder depth adopt the 1/50 main span length .The suggested parameters are regarded as the optimal structural design parameters .

关 键 词：空腹式连续刚构桥 正交试验 结构设计参数 梁底曲线 梁高 优化 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] U442.5[交通运输工程—道路与铁道工程]