钢管混凝土组合桁梁温度梯度试验研究与温度效应分析  

Experimental research of the temperature gradient and analysis on thermal effect of CFST composite girder

作　　者：彭桂瀚[1,2] 韦剑平 林伟[1] 

机构地区：[1]福州大学土木工程学院,福建福州350116 [2]福州大学可持续与创新桥梁福建省高校工程研究中心,福建福州350116

出　　处：《南昌大学学报（工科版）》2016年第4期366-370,共5页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51178119);福州大学科技发展基金资助项目(2014-XQ-32)

摘　　要：以某钢管混凝土组合桁梁桥为工程背景,进行钢管混凝土组合桁梁的截面温度场现场监测与试验研究,通过比较分析,提出组合桁梁典型温度梯度分布;采用有限元方法,研究不同温度梯度下的结构温度效应。分析结果表明:温度梯度的取值对组合桁梁结构受力与变形影响明显;实测温度梯度作用下的温度效应值大于现行规范计算值。Taking one concrete-filled steel tube（ CFST） truss girder bridge in China as background project in this paper,the in-field monitoring and the experimental model research for the temperature field of CFST truss girder were carried out. And the typical temperature gradient mode was proposed by comparison the in-field monitoring data and the experimental results. The effect of temperature gradient on the structure was analyzed using the finite element method. The results showed the temperature gradient mode had important on the mechanical behavior and deformation of the CFST truss girder and the structural response induced by the measured temperature gradient was greater than others calculating by the given temperature gradient from the existing design codes.

关 键 词：钢管混凝土 组合桁梁 温度场试验 温度梯度 

分 类 号：U443[建筑科学—桥梁与隧道工程]