混凝土薄壁箱梁横向温度应力分析  

Analysis of Transverse Temperature Stress of Concrete Thin-Wall Box Girder

作　　者：颜昌清 阳先全 

机构地区：[1]武汉中交试验检测加固工程有限责任公司,湖北武汉430052

出　　处：《桥梁建设》2009年第3期25-28,43,共5页Bridge Construction

摘　　要：基于能量变分法原理对混凝土薄壁箱梁桥在梯度温度作用下的箱梁横向效应进行分析,并推导了一般公式。计算结果表明在指数函数形式的梯度温度作用下,本文方法计算得到的横向拉应力值与ANSYS计算值相当,而常规方法的计算值要小于本文方法。此外还对箱梁各截面尺寸变化对其顶板下缘横向温度应力的影响进行分析,从中可以看出,箱梁梁高的变化对其横向应力的影响较大。Based on the energy variation principle, the transverse effect of the concrete thinwall box girder of a concrete bridge under the action of gradient temperatures is analyzed and the general formulas for the effect are deduced. It is found from the results of the calculation that under the action of the gradient temperatures of exponential functiion kind, the transverse tensile stress values calculated by the method as given in this paper are about the same with those calculated by ANSYS while the values calculated by the regular methods are less than those calculated by the method in the paper. In addition, the influence of variations of sectional dimensions of the box girder on the transverse temperature stress in the lower side of the top plate is analyzed as well, from which it can be seen that the variations of the box girder depth have significant influ- ence on the transverse temperature stress.

关 键 词：箱形梁 梯度温度作用 横向效应 温度应力 力学分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]