结构施工时变内力分析

将使用阶段的结构作为受力分析对象是目前结构设计的常规做法,其结果是结构的最终内力、变位等与施工过程无关,这不符合工程实际情况,而现行的结构工程施工内力有限元法并没有提供相应的公式能解决这个问题。利用施工过程时变有限元分析方法对结构施工内力进行几何非线性分析,使计算结果更符合结构施工的实际情况,全过程跟踪分析结构在施工各阶段以及施工完毕时的变量,指出结构工程设计考虑施工过程时变效应影响的重要性。

Time-dependent analysis of construction internal forces of structures

It is incorrect to take the model as the real structure for mechanics analysis,although this method is commonly used for design by the researchers and engineers in practice.By this method,the structural internal forces and displacements at the end of construction will not be changed with the construction method as well as the process.According to conventional finite element method reasonable analysis approach and formula to solve this problem has not been obtained.In this paper,a structural analysis method was developed based on the time-varying analysis of construction process.The structure member internal forces,the joint displacements and the restraint forces in every construction stage may be calculated by this method.The provided method is more reasonable for structures in practice than traditional methodsdo.