大体积混凝土结构温度损伤研究

研究混凝土浇筑块在温度作用下的损伤分布,可为大体积混凝土温度损伤理论在实际工程中的应用提供参考。基于指数函数温度损伤模型,分析混凝土浇筑块结构计算周期内所有节点的损伤量,并结合数据可视化处理技术,将结构体损伤量以等值线图的形式呈现。计算结果表明,浇筑期间及浇筑完成的初期,混凝土浇筑块表面及基础约束区的温度损伤严重;结构体损伤程度与温度应力分布在时间上不同步。因此,对混凝土结构进行温度损伤分析是十分必要的。

Study on Temperature Damage of Mass Concrete Structures

The purpose is to study the damage distribution of concrete pouring block under temperature load, which can provide reference for the application of temperature damage theory of mass concrete in practical engineering. Based on the exponential function thermal damage model, all the damage of structural nodes in the calculation period of the mass concrete were analyzed, and combined with the technology of data visualization, the amount of structural damage was presented in the form of an isogram. The calculations prove that during the pouring period and the early completion of the pouring, the temperature damage of the concrete pouring block surface and the foundation restraint area are serious. The damage degree of the structure is not synchronized with the temperature stress distribution in time. So, it is necessary to analyze the temperature damage of the concrete structure.