（湖南大学土木工程学院， 长沙 410082）

［摘要］在阐述OpenSEES软件解决无粘结部分预应力混凝土梁非线性分析的基础上，对无粘结部分预应力混凝土梁在低周反复荷载作用下的恢复力模型进行了研究。着重介绍了无粘结预应力筋等材料本构模型的选取和基于柔度法的梁柱非线性分析方法及其计算框图，计算了无粘结部分预应力混凝土梁在低周反复荷载作用下的弯矩-挠度滞回曲线，与试验曲线比较得到了令人满意的结果，为OpenSEES解决无粘结部分预应力混凝土结构恢复力模型提供了一条新的途径。

［关键词］无粘结部分预应力混凝土梁； 低周反复荷载； OpenSEES； 恢复力模型； 弯矩-挠度滞回曲线

中图分类号： TU378.2 文献标识码： A文章编号：  1002-848X(2016)S1-0691-05

Research on restoring force model of unbonded partially prestressed 

concrete beams based on OpenSEES 

Tang Changhui， Ni Jia， Chen Minghui

(Department of Civil Engineering， Hunan University， Changsha 410082， China)

Abstract: On the basis of demonstrating the applicability of OpenSEES in nonlinear analysis of unbonded partially prestressed concrete beams, restoring force model of unbonded partially prestressed concrete beams under low cyclic reversed loading was researched. Material constitutive model of unbounded prestressed reinforcement etc. and method of nonlinear analysis based on nonlinear beam column element were emphasized. Moment-deflection hysteretic curves of unbonded partially prestressed concrete beams under low cyclic reversed loading are calculated. The calculation results agree reasonable with experiment results, which provide a new way to research restoring force model of unbonded prestressed concrete structures utilizing OpenSEES software.

Keywords: unbonded partially prestressed concrete beam; low cyclic reversed loading; OpenSEES; restoring force model; moment-deflection hysteretic curve

作者简介： 唐昌辉，博士，副教授，Email:tchui2010@126.com。

*国家自然科学基金项目（51278179）。