部分斜拉桥整体变温和索梁温差效应分析  

Analysis of system temperature variation Emperature Variation Between Cables And Beams Effect of Partial Cable Stayed Bridge

作　　者：王晶[1] 

机构地区：[1]西南交通大学,四川成都610031

出　　处：《四川建材》2017年第4期103-104,106,共3页Sichuan Building Materials

摘　　要：部分斜拉桥由于构造复杂,在气温变化等因素作用下会产生斜拉索与主梁温差和整体升降温等温度问题。本文依托广佛环线东平水道大桥项目,利用Midas/Civil对成桥阶段的索梁温差以及全桥整体升温、降温进行计算。结果表明:季节性整体升降温对主梁挠度、应力影响较小;索梁温差引起的主梁挠度较大,成桥阶段跨中最大值达到了27.2mm,桥墩支座处主梁产生了转角。本文所得结论可为今后铁路PC部分斜拉桥温度问题提供参考。Due to the complex structure of the partial cable - stayed bridge, emperature variation will induces temperature problems of partial cable - stayed bridge, such as temperature difference between cable and girder, overall temperature change. Based on the Dongping waterway bridge program, Both the whole bridge model and the largest cantilever construction model were established by Midas/ Civil. The effects of system temperature variation and temperature variation between cables and beams were calculated. The results show that the seasonal fluctuation of temperature on the girder deflection and stress has little effect; the girder deflection caused by temperature difference between cable and girder is large, the maximum reached 27. 2mm, the pier bearing girder has angle. The results obtained in this paper can provide reference for the temperature of the PC partial cable -stayed bridge of railway in the future.

关 键 词：部分斜拉桥 整体变温 索梁温差 温度应力 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]