（1 同济大学土木工程防灾国家重点实验室, 上海 200092； 2 广西交通设计集团有限公司, 南宁 530028； 3 中国建筑科学研究院有限公司， 北京 100013）

［摘要］使用弹簧单元和考虑缺陷的钢筋灌浆料粘结滑移模型，建立了考虑缺陷影响的装配式混凝土柱的有限元模型。为了证明该数值模型的有效性，将模拟结果与试验结果进行了验证，分析了所用方法的有效性和不足。基于所建模型，针对试件的承载力与延性，分析了循环荷载作用下灌浆缺陷对装配式混凝土柱的性能影响。结果表明：数值模拟方法能较好地模拟灌浆缺陷对装配式混凝土柱的性能影响。单调荷载作用下，在弹性阶段，灌浆缺陷对装配式混凝土柱的承载力、刚度和延性等影响不大；在塑性阶段，灌浆缺陷会导致装配式混凝土柱的承载力下降，延性降低。循环荷载作用下，在弹性阶段，灌浆缺陷对装配式混凝土柱的承载力、刚度和延性影响不大；在塑性阶段，灌浆缺陷导致装配式混凝土柱的承载力下降，刚度退化程度更剧烈，延性降低。

［关键词］装配式混凝土结构； 钢筋套筒灌浆连接； 有限元方法； 灌浆缺陷

中图分类号：TU398-7文献标识码：A文章编号：1002-848X(2018)23-0033-05

Numerical simulation on seismic behavior  of pre-cast concrete column with grouting defects

Tang Hesheng1, Ling Suqi2, Wang Ni3

(1 State Key Laboratory for Disaster Mitigation in Civil Engineering, Tongji University, Shanghai 200092, China;2 Guangxi Communications Design Group Co.，  Ltd.，  Nanning 530028, China；3 China Academy of Building Research Co., Ltd., Beijing 100013, China)

Abstract:Using spring element and bond-slip model of reinforcement grouting material considering defects, the finite element model of pre-cast concrete columns considering defects was established. In order to prove the validity of the numerical model, the simulation results and experimental results were verified, and the effectiveness and shortcomings of the method were analyzed. Based on the model, aiming at the bearing capacity and ductility of the specimens, the influence of grouting defects on the performance of pre-cast concrete columns under cyclic loading was analyzed.The results show that the numerical simulation method can better simulate the influence of grouting defects on the performance of fabricated concrete columns. Under the monotonic load, in the elastic stage, the grouting defect has little effect on the bearing capacity, stiffness and ductility of pre-cast concrete columns; in the plastic stage, the grouting defect will cause the bearing capacity of pre-cast concrete columns to decrease and the ductility to decrease. Under the cyclic loading, in the elastic stage, the grouting defects have little effect on the bearing capacity, stiffness and ductility of pre-cast concrete columns; in the plastic stage, the grouting defects cause the bearing capacity of  pre-cast concrete columns to decrease,  the degree of stiffness degradation to be more intense, and ductility to reduce.

Keywords:pre-cast concrete structure; grout-filled steel sleeve; finite element method; grouting defect

*国家重点研发计划项目(2016YFC0701800)。

作者简介：唐和生，博士，副教授，博士生导师，Email:thstj@tongji.edu.cn。