半灌浆套筒连接接头动态性能研究  

Research on Dynamic Performance of Connection Joint of Half Grout-filled Coupling Sleeve

作　　者：陈年和[1] 殷粉芳 孙武 CHEN Nianhe;YIN Fenfang;SUN Wu(Department of Architectural Engineering Technology,Jiangsu Vocational Institute of Architectural Technology,Xuzhou,Jiangsu 221115,China;Jiangsu Modern Building Industrialization Engineering Laboratory,,Xuzhou ,Jiangsu221115,China;Jiangsu Collaborative Innovation Center for Building Energy Saving and Construction Technology,Xuzhou,Jiangsu 221115,China)

机构地区：[1]江苏建筑职业技术学院建筑工程技术学院,江苏徐州221116 [2]江苏省现代建筑工业化技术工程实验室,江苏徐州221116 [3]江苏建筑节能与建造技术协同创新中心,江苏徐州221116

出　　处：《施工技术》2018年第22期60-63,共4页Construction Technology

基　　金：江苏高校品牌专业建设工程资助项目(PPZY2015A085);江苏高校"青蓝工程"资助项目

摘　　要：通过试验研究3种加载速率(0.6,6,60mm/s)下的半灌浆套筒连接接头动态性能,分析了试件的破坏形式和荷载-应变变化规律。研究结果表明:大部分试件的破坏始于钢筋被拉断且出现碎浆时,个别试件发生套筒滑丝破坏;试件破坏时钢筋均达到屈服状态,套筒未屈服,满足规范规定的强度要求;随着钢筋直径的增大,试件承载力明显提高;由于机械连接端螺纹与钢筋间的咬合作用消耗了部分动态荷载能量,因此加载速率对半灌浆套筒试件的承载力影响有限。进行装配式结构设计时,可不考虑动态荷载对钢筋连接接头性能的影响。Based on experimental results of dynamic performance of half grout-filled coupling sleeve with three kinds of loading rates(0.6,6,60mm/s),the failure and load-strain relationship are analyzed.The results show that,the failure of most members starts with fracture of bars and failure of grout,individual member fails by thread stripping of coupling sleeves.When members fail,bar yields while coupling sleeves not,which conforms regulations.The strength of members improves significantly with the increase of bar size.Since mechanical connection between threads and bars can consume part of the energy of dynamic loads,the rate of load has minor effect on strength of half grout-filled coupling sleeve.Effect on bar connection joints of dynamic loads can be ignored in the design of precast concrete structures.

关 键 词：装配式建筑 动态性能 套筒灌浆 机械连接 荷载 应变 

分 类 号：TU375[建筑科学—结构工程]