超大面积地下室顶板温度应力研究

Research on Temperature Stress in Super-Area Upper Plate of Basement

针对混凝土超大面积地下室顶板的温度应力进行了研究,考虑了混凝土弹性模量和收缩徐变随时间的变化以及结构的不同约束条件等因素,应用有限元法对温度应力、应变进行分析,讨论了混凝土不同龄期和约束作用对温度应力的影响程度,为超长地下室顶板温度应力、应变控制设计提供参考.

The temperature stress of overlarge area basement plate is investigated. The changing of concrete elastic modulus and restrain condition with time are taken into account. The temperature stress and strain of its top plate are carried out using linear elasticity FEM analysis. The effect of different restrain on temperature stress analysis is also analyzed. The conclusions will provide reliable reference to control temperature stress and restrain for overlarge area basement plate.