大跨连续刚构预应力混凝土箱梁温度效应分析  

Analysis of temperature effect for long span pre-stressed concrete box girder of continuous and rigid frame bridge

作　　者：陈宇峰[1] 王维红[1] 徐君兰[1] 

机构地区：[1]重庆交通大学土木建筑学院

出　　处：《山西建筑》2007年第19期300-301,共2页Shanxi Architecture

摘　　要：介绍了大跨连续刚构预应力混凝土箱梁在两种温度场下温度效应,重点分析非线性温度梯度下混凝土箱梁的温度效应,通过对比实测和JTG D60-2004公路桥涵设计通用规范的温度梯度模式,指出规范的温度梯度模式不足,提出了预防连续刚构箱梁温度效应的措施。This paper introduces temperature effect for long span pre-stressed concrete box girder of continuous and rigid frame bridge considering two kinds of temperature fields. Temperature effect of the concrete box girder under the non-linear gradient of temperature is analyzed with emphasis. Through contrasting the actual mode of temperature gradient from observation results for concrete box girder with the mode of temperature gradient from general code for design of highway bridges and culverts we can arrive at the conclusion that the mode of temperature gradient from general code for design of highway bridges and culverts isn＇t pretty. Some prevention measures for temperature effect about concrete box girder of continuous and rigid frame bridge are proposed.

关 键 词：温度效应 非线性温度梯度 预应力混凝土箱形梁 温度梯度模式 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]