自预应力钢管混凝土初始自预应力的弹性理论分析

Theoretical Analysis of Elasticity of Initial Self-prestress of Self-prestressed Concrete-filled Steel Tube

在不考虑核心混凝土徐变等诸多不确定因素影响的情况下,自预应力钢管混凝土结构初始自预应力的理论计算一般都采用平面弹性模型。提出考虑三向受力的轴向自由弹性模型和轴向限制弹性模型,并推导这2种模型的计算公式,进行参数分析,对3种计算模型进行对比。

On condition that the influences of many uncertain factors such as the core concrete creep,etc,the theoretical calculation for the initial self-prestress of the self-prestressed concrete-filled steel tube generally adopts planar elastic model.This paper proposes the axial unrestricted elastic model and the axial restricted elastic model by considering forces from three directions,derives the formulas of computation for these two models,analyzes parameters,and compares three calculating models as well.