结构工程施工分析的材料时变效应

Structural Analysis Considering Material Time-varying in Construction

目前的钢筋混凝土建筑结构分析主要是针对已建造好的完整结构在使用荷载作用下的计算模型为依据 ,通常不考虑结构本身或材料刚度随时间改变对整个结构的影响 .然而这是同结构的实际变位和应力状态有差异的 ,也不符合实际施工过程中产生的力学状态 .为此采用超级有限元 -有限元结合法 ,对其进行结构与材料时变的施工模拟分析 ,为结构的合理设计 ,保证建造全过程的安全性和可靠性 。

Usually,the structural analysis of reinforced concrete buildings is carried on the basis of the whole structural compute models under using loads and it is not considered that the time-varying stiffness of the structure itself or the usage materials affect the whole structure.However there are some obvious differences in real deformation and stress in the structure as well as the mechanics state in the construction process.In this paper,the combinative method of supper finite element method (SFEM)-finite element method (FEM) is applied to analyze the reinforced concrete buildings taking account of the time-varying of the structure and materials in construction-modeling,guaranteeing the safety and credibility of the whole construction.The intention is to design with reason and there are some theoretical and realistic meanings.