摘要
以兰樟田1#桥为工程背景,结合我国公路桥梁规范关于温度梯度的规定,借助通用有限元软件ANSYS探讨温度标准值的变化对混凝土箱梁桥的应力状态的影响。分析结果表明:温度对桥梁结构的影响显著,尤其以顶板的应力状态对温度变化敏感。根据分析结果,建议规范中温度梯度的取值应考虑各地不同气候情况。
Setting in the Lanzhangtian Bridge No.1 Project and referring to the stipulations on temperature gradient in current code,this article aims to investigate the effects on the stress condition of concrete box-girder bridges caused by standard temperature changes.The process was carried out by virtue of the general finite element analysis software—ANSYS.The result showed that temperature would greatly affect the structural behavior of a bridge,in particular that the stress condition of the top plate is sensitive to temperature changes.It was therefore suggested that climate conditions should be taken into consideration when determining the temperature gradient values in the code.
出处
《结构工程师》
2011年第5期44-49,共6页
Structural Engineers
关键词
混凝土箱梁桥
温度梯度
温度应力
敏感性
concrete box-girder bridge
temperature gradient
thermal stress
sensitivity
