超长混凝土结构温度效应分析及设计措施

摘要

Under the temperature load,the deformation and internal forces of the overlong concrete structure has been the main problem need to solve.In this paper,a three-dimensional model of an overlong concrete structure was established based on the finite element analysis software MIDAS/Gen.The deformation and internal forces of the structure under the temperature load were investigated and the locations and measures of the expansive strengthening band were designed based on the analysis results.According to the condition of use,the designed expansive strengthening band could reduce the principal tensile stress of the slab and prevent the occurrence of cracks,and similar projects could reference the design.%在温度荷载作用下,超长混凝土结构产生的变形和内力一直是工程实践中需要解决的主要问题.利用有限元分析软件MIDAS/Gen建立某超长混凝土框架结构的三维模型,着重分析了在温度荷载作用下结构的变形和内力,在此基础上对膨胀加强带的位置和做法进行了设计.建成后使用情况表明,所设计的膨胀加强带可有效地减小板的主拉应力,预防裂缝的产生,可供同类工程在设计时参考.