预应力混凝土结构非线性分析的新方法

A new approach for nonlinear analysis of prestressed concrete structure

由于预应力钢筋的存在 ,使得预应力混凝土结构与普通混凝土结构的力学性能表现不一致。本文作者提出了一种基于杆系单元模型的预应力混凝土结构非线性分析的全新模型 ,该模型将预应力混凝土结构分为混凝土单元、普通钢筋单元和预应力钢筋单元三种材料单元。普通钢筋单元和预应力钢筋单元与混凝土单元通过粘结滑移模型协调变形 ,并且考虑箍筋和截面剪应力分布的影响。通过试验 ,验证了本文模型。

Because of prestres sed tendons persisting,the performance of prestressed concrete structure is different from that of reinforced concrete structure.A new model,which can be used in nonlinear analysis of prestressed concrete structure,is proposed in this paper.This new model is based on the Rod Model.The prestressed concrete structure is divided into concrete units,steel units and tendon units,the steel units and the tendon units change with the concrete units accordingly,and web reinforced and shearing are considered.A test shows that this model is acceptable.Also this model can be used in nonlinear analysis of reinforced concrete structure.