超长混凝土结构间接作用效应计算实例分析及应对措施

The calculation analysis examples and solutions of super-length concrete structure indirect effect

新建筑结构荷载规范中列入了温度作用。本文根据新荷载规范的相关规定,介绍了温度等间接作用的取值方法,并结合具体工程实例,对超长混凝土结构考虑基础刚度,计入温度、收缩及徐变等非荷载工况进行分析。分析结果表明,超长混凝土结构在温度等间接荷载作用下,结构中部混凝土拉应力及端部弯曲应力较大。针对分析结果,本文提出了解决混凝土结构超长问题的一系列应对措施,例如加强局部应力较大处混凝土构件配筋、优化混凝土原材料及加强施工措施等方法,以供工程设计参考。

The effect of temperature was enrolled in the new load code for the design of building structures. This paper is based on the relevant provisions of the new load code for the design of building structures, introduced the computing method of the effect of temperature and other indirect load, combined with specific engineering example, the super - length concrete structure considering foundation stiffness, included in the non load condition, such as temperature, shrinkage and creep are analyzed. The analysis results show that the super - length concrete structure under the effect of temperature and other indirect load, central ten- sile stress of concrete structure and the end ~ff the bending stress is larger. According to the results of the analysis, this paper puts forward a series of measures to solve the problem of super - length concrete structure, such as strengthening concrete structures reinforcement with strong local stress, optimization of con- crete raw materials and strengthening construction measures, in order to provide the reference for the engineering design.