混凝土斜拉桥的温度效应分析  

Temperature effect analysis of concrete cable-stayed bridge

作　　者：郭棋武[1] 方志[1] 裴炳志[2] 邓海[2] 刘光栋[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖北省交通规划设计院,湖北武汉430051

出　　处：《中国公路学报》2002年第2期48-51,共4页China Journal of Highway and Transport

基　　金：国家自然科学基金项目 (5 980 80 0 5 )

摘　　要：为了研究混凝土斜拉桥的温度效应问题 ,在武汉市江汉四桥施工过程中进行了 2 4 h温度效应的观测。在实测资料的基础上 ,首先对温差公式进行了参数识别 ,然后对此桥的温度效应运用有限元的方法进行了理论计算 ,通过与实测资料的比较 ,说明了非线性温度梯度分布模式的适用性 ,计算了温度效应所导致的温度应力。同时为了保证施工过程的连续性 ,对主梁立模标高的主动修正问题 ,也进行了分析和计算。In order to study the temperature effect of PC cable stayed bridge,temperature effect in 24 hours during the construction of the fourth bridge across the Hanjiang river in Wuhan was measured.Firstly the parameters in thermal difference expressions are identified.Then using the finite element method,the temperature effect is theoretically analyzed,and the calculated results agree well with the measured data.It is possible to conclude that nonlinear temperature gradients mode presented in this paper is appropriate.The stress caused by effect temperature is computed.Furthermore an original method is put forward in this paper to make an active revise to the elevation of the main beam.

关 键 词：混凝土斜拉桥 参数识别 温度效应 

分 类 号：U448.33[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]