钢管初应力及混凝土自应力对钢管混凝土构件承载力影响分析

通过在钢管上施加均布面荷载和对混凝土施加温度荷载分别模拟钢管初应力和混凝土自应力，利用ANSYS有限元程序建立钢管混凝土构件实体模型，分析钢管初应力和混凝土自应力对钢管混凝土构件承载力影响规律，在此基础上拟合钢管混凝土构件承载力计算公式，相对于数值结果而言，该拟合计算公式具有较高的精度。

Analysis for Influences of Initial Stress of Steel Tubes and Self-stress of Concrete on Bearing Capacity of Concrete-filled Steel Tubular Members

This paper simulates initial stress of steel tubes and self-stress of concrete by applying load of uniformly distribution surface and applying temperature load on concrete, establishes the entity model of concrete-filled steel tubular members by means of ANSYS finite element, and analyzes the laws of influences of initial stress of steel tubes and self-stress of concrete on concrete- filled steel tubular members, and on this basis fits computational equation for bearing capacity of concrete-filled steel tubular members. Relative to numerical result, this fitted computational formula has higher accuracy