连续钢桁架弯梁桥支座优化方案研究  

Research on optimized scheme of the support of steel truss continuous curved beam bridge

作　　者：余果 蒋冬情 陈瑞 王祺顺 Yu Guo;Jiang Dongqing;Chen Rui;Wang Qishun(Guizhou Hongxin Chuangda Engineering Inspection Consulting Co.,Ltd.,Guiyang 550014,Guizhou;School of Civil Engineering,Changsha University of Science and Technology,Changsha 410014,Hunan;Hunan Communications Research Institute Co.,Ltd.,Changsha 410014,Hunan)

机构地区：[1]贵州宏信创达工程检测咨询有限公司,贵州贵阳550014 [2]长沙理工大学土木工程学院,湖南长沙410014 [3]湖南省交通科学研究院有限公司,湖南长沙410014

出　　处：《工程建设》2020年第6期41-44,59,共5页Engineering Construction

摘　　要：使用Midas/Civil建立某三跨连续钢桁架弯梁桥有限元模型,对比分析了全抗扭支撑体系和中间墩抗扭-点铰混合支撑体系下主桁架受力行为。计算结果表明:中间墩抗扭-点铰混合支撑体系可有效改善主桁架在恒载作用下内侧支座脱空的现象,同时大幅降低温度梯度作用下主桁架扭矩,缓解因温度爬移导致的梁体扭转。A finite element model of a three-span steel truss continuous curved beam bridge is built using Midas/Civil,and the main truss behavior under the full torsion support system and under the torsion-point hinge hybrid support system for intermediate piers are compared and analyzed. The results show that the torsion-point hinge hybrid support system for intermediate piers not only can effectively solve the inner support disconnection from the main truss under dead load,but also can significantly reduce the main truss torque under temperature gradient action,and can alleviate the beam torsion caused by temperature creep.

关 键 词：连续弯梁桥 钢桁架 全抗扭支撑体系 支座脱空 扭矩 

分 类 号：U441[建筑科学—桥梁与隧道工程] U443.36[交通运输工程—道路与铁道工程]