摘要
以某40m+5×70m+40m预应力混凝土箱梁为依托,分析了日照作用下混凝土箱梁竖向温度分布规律。借助midas Civil有限元结构分析软件,分别建立了箱梁悬浇阶段和成桥状态下的温度引起的结构状态变化模型,并进行了温度对箱梁应力和挠度影响的计算与分析。结果表明,温度对桥梁应力及挠度有一定影响,特别是成桥状态下温度对桥梁应力影响较大,因此在桥梁施工监控和结构测试时应考虑温度效应。
Based on the engineering background of a 40 m+ 5×70 m+40 mprestressed concrete box girder,the vertical temperature distribution of concrete box girder is analyzed.With the help of midas Civil finite element analysis software,the structural state change model of the box girder under the cantilever stage and the temperature under the bridge is established,and the influence of temperature on the stress and deflection of the box girder is calculated and analyzed.The results show that the temperature has a certain influence on the stress and deflection of the bridge.Especially,the temperature in the bridge state has a great influence on the stress of the bridge.As the result,the temperature effect should be taken into account in the bridge construction monitoring and structural testing.
出处
《交通科技》
2018年第1期44-47,共4页
Transportation Science & Technology
关键词
桥梁
温度场
有限元计算
应力
bridge
temperature field
finite element calculation
stress
