键槽梁底筋锚入式预制梁柱连接恢复力模型  

Restoring force model of precast beam-column connections incorporating beams with grooves and anchored bottom longitudinal bars

作　　者：管东芝[1,2] 郭正兴[1,2] 杨辉 杨森[1,2] Guan Dongzhi;Guo Zhengxing;Yang Hui;Yang Sen(School of Civil Engineering,Southeast University,Nanjing 210096,China;Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学土木工程学院,南京210096 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,南京210096

出　　处：《东南大学学报（自然科学版）》2018年第5期821-827,共7页Journal of Southeast University：Natural Science Edition

基　　金：国家重点研发计划资助项目(2016YFC0701703);国家自然科学基金资助项目(51678136);中央高校基本科研业务费专项资金资助项目

摘　　要：为提高建造效率并有效保证结构性能,对2种键槽梁底筋锚入式预制梁柱连接(锚固与附加钢筋搭接混合连接和部分高强筋预制装配式框架梁柱连接)进行了研究分析.针对节点核心区较强的键槽梁底筋锚入式预制梁柱连接特点,提出了强度和变形计算方法,构建了三折线骨架曲线理论模型.通过线性拟合方法得出试验滞回曲线各阶段曲线刚度值,并拟合试件在低周反复荷载作用下各阶段刚度与加载位移角的关系,进而形成恢复力模型.计算结果表明,三折线理论骨架曲线与试验结果较为接近.建立的恢复力模型计算结果与试验滞回曲线吻合较好,反映了键槽梁底筋锚入式预制梁柱连接各阶段的受力特点,为弹塑性分析和抗震设计提供了理论依据.In order to improve construction efficiency and ensure structural performance,two precast connections,including the precast connection combining anchored reinforcing bars and lap-spliced additional reinforcing bars and the precast concrete beam-to-column connection partially reinforced with high-strength rebars,are studied.Aiming at the precast connections incorporating beams with grooves and anchored bottom longitudinal bars with strong beam-to-column joints,the calculation methods for the strength and the deformation are proposed.The tribble linear line model is built.The stiffness of hysteresis loops at different stages is obtained by linear fitting,and the relationship of the stiffness and the loaded drift is established by fitting.Then,the restoring force model is built.The results show that the skeleton curves of the tribble linear line model are close to the experimental results of specimens.The established restoring force model can simulate the experimental hysteresis curves,reflecting the characteristics of the precast beam-column connections incorporating beams with grooves and anchored bottom longitudinal bars at different loaded stages.It provides a theoretical basis for elastic-plastic analysis and seismic design.

关 键 词：恢复力模型 装配式混凝土 梁柱节点 连接形式 刚度 

分 类 号：TU375.4[建筑科学—结构工程]