混凝土箱梁空间受力梯度温度影响分析  

Analysis of Temperature Gradient Effects on Mechanical Properties of Concreate Box Girder

作　　者：邓成刚 高波[2] 戴捷[2] 杨鹏 

机构地区：[1]深圳高速公路股份有限公司,广东深圳518026 [2]江苏省交通规划设计院,江苏南京210005

出　　处：《现代交通技术》2014年第1期22-25,共4页Modern Transportation Technology

摘　　要：为研究梯度温度对大跨径宽幅预应力混凝土箱梁空间受力性能的影响,建立考虑施工阶段的空间实体有限元模型,分析箱梁挠度、纵横向应力等在梯度温度作用下的变化特点,同时比较新老规范在计算梯度温度时不同规定所产生的差别。研究表明,梯度温度对箱梁受力性能有较大影响,新规范较老规范保守。In order to analyze mechanic properties of large span PC wide box girder under temperature gradient, finite element model is built to analyze the changing characteristics of girder deflection and stress along the whole construction stage. The calculation difference between codes in the past and at present is concerned. Study shows that temperature gradient greatly affects the mechanics of the box girder, and the result calculated based on the new code is more conservative.

关 键 词：预应力混凝土箱梁 梯度温度 空间分析 整体预制 单箱双室 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]