某超长隔震结构在温度及收缩作用下的变形研究

摘要

Based on-site monitor of a long isolation structure designed by our group, considering the local seasonal temperature and shrinkage of concrete, the analysis model is established by the use of SAP2000 finite element software, and the deformation reason of ultra-long base isolated structure is analyzed. The effect of different structure deformation caused by the different steel bar connection ways of the post-pouring strip is compared. The result shows that the finite element simulation values are basically consistent with the actual measured values, temperature and shrink is the main reason of structure deformation, and the practice of post-pouring strip affect the maximum value of bearing displacement.%通过对本课题组负责设计的一超长隔震结构的温度和收缩变形进行的有限元模拟及现场监测,根据工程所在地的代表性季节温差与混凝土收缩,利用SAP2000有限元软件建立了分析模型,对引起超长隔震结构变形的原因进行了分析,同时对比了后浇带处钢筋不同的连接方法对结构变形的影响,有限元模拟值与现场实测值基本吻合.结果表明,温度与收缩的综合作用是结构收缩的主要原因,且后浇带处钢筋的连接方法对支座最大位移影响较大.