巨型钢管混凝土框架结构柱模型等效简化理论分析

Theoretical analysis of the equivalent simplification model about mega column of steel tube concrete mega-frame structure

为了克服目前巨型框架结构分析过程中,节点和单元数过于庞大、构造复杂、耗时较长等不利因素,通过将巨型框架结构体系中应用较多的钢管混凝土柱、支撑简化为具有等效轴向刚度EA、等效弯曲刚度EI及等效剪切刚度GS的等效实腹柱和支撑的方法,简化建模难度,节约机时,实现变参数分析的目的。推导了等效简化的过程和方法,并就某一巨型钢管混凝土框架结构体系柱进行了验算,结果表明,等效简化效果明显。

In order to overcome the present disadvantage factors in mega-frame structure analysis process,such as the nodes and frame members too large,complex,time-consuming longer,etc.Steel tube concrete mega-frame structure was extensive used.Through the way of equivalent simplified column and support to equivalent solid web column,which has equivalent axial stiffness EA,equivalent bend stiffness EI and equivalent shear rigidity GS.It will simplify modeling difficulty,save machine hours,achieve the purpose of variable parameter analysis.This paper derived the equivalent simplification process and method,and checked calculation one mega-frame structure,the results showed that the equivalent simplification effect is obvious.