含FRP约束环钢筋连接装配柱的抗震性能分析  

Seismic Performance Analysis of Assembled Columns with FRP-confined Reinforcement Lap Joint

作　　者：金峤[1] 张永良 孙丽[1] JIN Qiao;ZHANG Yongliang;SUN Li(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2023年第5期880-887,共8页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(52078310)。

摘　　要：目的 为了提高装配式混凝土柱节点的连接性能,探索预制装配式构件的数值建模方法。方法 采用OpenSees有限元分析软件建立了采用新型连接方式的宏观单元模型,结合精细化纤维截面分区技术和基于零长度截面单元的应变渗透效应模拟技术,分析应变渗透效应、连接接缝位置以及轴压比等因素对柱抗震性能的影响。结果 连接接缝位置靠近柱根部时,装配柱的滞回性能降低;装配柱的累计耗能稍大于现浇柱;装配柱的延性系数在4.66~5.63内,极限位移角在1/51~1/71,均略小于现浇柱;不同轴压比条件下,装配柱的承载力和延性的变化规律与现浇柱相同。结论 连接接缝位置位于塑性铰区域外时,装配柱的承载力、刚度退化、耗能与现浇柱更为接近,在结构设计时应考虑预制柱连接接缝位置的影响。In order to study the connection performance of prefabricated concrete columns with FRP-confined reinforcement lap joint.Based on the test results of the anchorage performance test and the lap performance test of this connection mode,the macroscopic element model of prefabricated column with this connection mode is established by using OpenSees software,combined with the refined fiber section zoning technology and the simulation technology of the strain penetration effects based on the zero length section,to analyze the effect of strain penetration,connection joint positions and axial compression ratio on the overall seismic performance of columns.When the connection joint position is close to the column root,the hysteretic performance of the prefabricated column decreases.The energy dissipation of the prefabricated column are slightly greater than the castin-place column.The ductility coefficient of the prefabricated column is between 4.66~5.63,and the drift ratio of assembled columns at ultimate is between 1/51~1/71,both of which are slightly less than the cast-in-place column.Under the condition of different axial compression ratios,the roles of the bearing capacity and ductility of the prefabricated columns are the same as those of the cast-in-place columns.The position of the connection joint is located outside the plastic hinge area of the assembled column,and its bearing capacity,stiffness degradation,and energy consumption are closer to those of the cast-in-place column.The influence of the joint position of prefabricated column connections should be considered in structural design.

关 键 词：装配式混凝土柱 纤维增强聚合物 OPENSEES 抗震性能 应变渗透效应 

分 类 号：TU398[建筑科学—结构工程]