部分预应力混凝土框架结构的非线性分析

本文直接从混凝土和钢筋的应力与应变关系,推导了预应力混凝土截面弯矩-轴力-曲率(M-N-Φ)关系的计算方法,并实现了框架梁与柱截面M-N-Φ关系计算方法的统一;提出了变刚度单元的位移模式与刚度矩阵,实现了部分预应力凝凝土框架结构的非线性分析。按本文建立的非线性分析方法所得的计算结果,与二榀部分预应力混凝土框架结构的试验结果吻合较好。

NONLINEAR ANALYSIS FOR PARTIALLY PRESTRESSED CONCRETE FRAMES

In this paper, deriving directly from the stress-strain relations for concrete and steel, the relation among moment, normal force and curvature (M-N-φ) on PC (Prestressed Concrete) sections is determined by the method presented. The methods of determing the M-N-φ relation for the beam section and the column section of a frame are unified. The displacement mode and stiffness matrix for element with variable stiffness are proposed. The nonlinear analysis for PPC (Partially Prestres sed Concrete) frames is implemented. The obtained results by the non-linear analysis are in good agreement with the results of the four PPC frame tests conducted by the author.