预应力自复位混凝土框架节点抗震性能数值模拟  

NUMERICAL ANALYSIS FOR SEISMIC BEHAVIOR OF SELF-CENTERING POST-TENSIONED PRECAST BEAM-TO-COLUMN CONNECTIONS

作　　者：蔡小宁[1] 孟少平[2] 

机构地区：[1]淮海工学院土木工程学院,江苏连云港222005 [2]东南大学混凝土&预应力混凝土教育部结构重点实验室,江苏南京210096

出　　处：《工程力学》2016年第3期143-151,共9页Engineering Mechanics

基　　金：江苏省自然科学基金项目(BK20130408);国家自然科学基金项目(51508220);淮海工学院引进人才科研启动基金项目(KQ12021);江苏省建设系统科技项目(2014ZD28)

摘　　要：预应力自复位混凝土框架结构(简称PTED结构)具有独特的受力性能。为了研究其抗震性能,基于弹塑性有限元分析程序Open Sees,提出PTED节点的数值模拟方法,并利用编制的角钢拉压恢复力模型,对5个PTED节点的低周往复荷载试验进行数值模拟并与试验结果对比。研究结果表明:通过合理的建模和参数选择,采用Open Sees有限元分析程序可以较准确地模拟出试件试验过程的滞回曲线,数值模拟所得的各极限状态点对应的荷载及位移与试验结果较吻合,同时可准确地模拟出角钢、预应力筋及梁端截面的力学行为。采用该文方法进行的数值模拟与试验结果吻合较好,精度可满足工程需求。The self-centering post-tensioned precast frames （simplified as PTED frames） have unique mechanical properties. To evaluate the seismic performance of the PTED frames, a modeling method is proposed for the PTED connections based on the finite element software OpenSees. Numerical analysis of the five PTED connections which were tested under cyclic reversal loads are performed, and the numerical results are compared with the experimental results. The results showed that the hysteresis curves of the specimen throughout the testing process can be accurately simulated by OpenSees. The load and displacement of each corresponding limit state agrees well with the experimental results, while the mechanical behavior of the angles, prestressing tendons and the beam end cross section can also been accurately simulated. Therefore, the numerical simulation results of the proposed method agrees well with experimental results, and the numerical simulation can satisfy engineering requirements of precision.

关 键 词：角钢 预应力筋 数值模拟 滞回曲线 抗震性能 

分 类 号：TU378.8[建筑科学—结构工程]