PC连续刚构底板预应力筋径向力分析  

The Analysis of Radial Force Because of Prestressed in the Bottom Slab of PC Continuous Rigid Frame Bridge

作　　者：张波 肖伟[2] 彭启明 陈倩 

机构地区：[1]重庆锦派建筑工程有限公司,重庆401120 [2]重庆市建筑科学研究院,重庆400015

出　　处：《交通科技与经济》2012年第1期1-4,共4页Technology & Economy in Areas of Communications

基　　金：国家自然科学基金资助项目(50908246)

摘　　要：根据PC连续刚构桥主跨跨中附近底板钢束在张拉过程中产生的径向外的崩力特征,分别就底板预应力筋以折代曲布置,施工过程中管道定位误差和合拢段两端高差造成的径向外崩力进行计算,利用有限元分析软件对合拢段底板进行局部应力计算,提出一系列连续刚构在施工过程中预防底板崩裂的建议。According to the characteristics of radial force which is made When steel beam of bottom slab is tensioning near the main middle span of PC continuous rigid frame bridge, this paper calculates radial force for steel beam of bottom slab curve layout, pipeline positioning error and both ends of the height difference of closure beam, analyzing the local stress of bottom slab of closure beam with finite element model, and makes a number of proposals on the prevention from bursting crack on the bottom slab in the construction.

关 键 词：连续刚构桥 径向外崩力 局部应力 底板崩裂 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]