实体有限元模拟预制节段桥墩循环荷载分析

采用实体有限单元法模拟无粘结预应力、普通箍筋约束预制拼装桥墩在循环荷载下的力学反应，得到其荷载位移滞回曲线。为了提高预制拼装桥墩的滞回性能，改进模型，使用贯穿节段接触面的普通纵向钢筋作为能量耗散装置增强耗能能力。改进后的模型残余变形小，滞回性能高。

Finite Element Simulations of Cyclic Loading Response of Precast Segmental Columns

This paper focuses on precast segmental unbonded posttensioned bridge columns with general transverse reinforcement. 3D finite element models are conducted to investigate the cyclic loading response behavior and force displacement curves of this type columns . In order to improve the hysteretic performance of the precast segmental columns, the models are been modified. Longitudinal mild steel reinforcement crossing the column segment joints is added as an energy dissipation device to enhance the hysteretic energy dissipation capacity of the columns. The improved models show better hysteretic energy dissipation capacity, and less residual displacement.