腹板斜率变化对宽幅大跨整孔预制箱梁受力影响研究  

Research on the Influences of the Mechanical Behavior of Wide Long-span Overall-precast Box Girder by Web Slope changes

作　　者：傅晨曦[1] 高波[1] 王立新[1] 戴捷[1] 

机构地区：[1]江苏省交通规划设计院股份有限公司,江苏南京210014

出　　处：《上海公路》2014年第4期37-41,共5页Shanghai Highways

摘　　要：腹板斜率变化会对桥梁的美观产生直接的影响,而且对于宽幅大跨整孔预制箱梁,采用斜腹板在一定程度上可以减小上部结构的重量和下部墩身及基础的工程量。但由于腹板倾斜,会对结构纵向受力产生不利影响,并增加一定的施工难度。通过腹板斜率变化对箱梁受力敏感性分析,得到既符合材料经济性和箱梁美观性要求,又满足受力要求的腹板斜率合理值。The web slope changes will have a direct impact on the aesthetics of the bridge.For the wide long-span overall-precast box girder,a reasonable web slope can,to a certain extent,reduce the weight of the upper structure and the engineering quantity of the pier and foundation.On the other hand,the web slope will adversely affect the longitudinal mechanical behavior of box girder,and increase the difficulty of construction.A reasonable value of web slope which not only meet the requirements of stress web slope but also satisfy the practicce and aesthetics,will be obtained by the sensitivity analysis of the mechanical behavior with web slope changing.

关 键 词：腹板斜率 宽幅大跨 整孔预制箱梁 敏感性分析 

分 类 号：U441[建筑科学—桥梁与隧道工程] U448.213[交通运输工程—道路与铁道工程]