摘要
目的研究含FRP约束环的钢筋锚固连接性能,为后续此种套筒连接的钢筋搭接试验研究做准备.方法对66个试件进行静力拉伸试验,试验中主要考虑钢筋直径、约束环直径、约束环壁厚、混凝土强度以及锚固长度等参数的影响,对试验构件的破坏形态以及应力应变曲线进行分析.结果钢筋最小锚固长度为0. 8倍钢筋基本锚固长度时,仍然可以保证钢筋的锚固性能; FRP约束环与内部灌浆料及外围混凝土之间未发生相互滑移及局部破坏的现象.结论含FRP约束环的灌浆钢筋连接技术是一种连接性能可靠、工艺简单、经济效益突出,适合于建筑工业化的预制装配式混凝土结构钢筋连接技术.
In order to study the performance of reinforcement anchorage connection with FRP restrained ring and prepare for the subsequent research,static tensile tests were carried out on66specimens.The main parameters considered in the test such as the diameter of steel bar,the diameter of the restraint ring,the thickness of the restraint ring,the strength of concrete and the length of anchorage.After that,the failure modes and stress-strain curves of the test members were analyzed.The result shows that the anchorage performance of the steel bar can still be guaranteed when the minimum anchorage length is0.8;in addition,there is no slip and local destruction phenomenon between FRP restraint ring and internal grouting material as well as peripheral concrete.Furthermore,the proposed technique is a reinforcement connection method for fabricated concrete structures with various good performances including the reliable performance,simple construction process and good economic benefit,which is suitable for construction industrialization of prefabricated reinforced concrete structures.
作者
金峤
李京龙
孙丽
赵明泽
JIN Qiao;LI Jinglong;SUN Li;ZHAO Mingze(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2018年第6期998-1007,共10页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51578347)
住房和城乡建设部科技攻关项目(2017-K9-057)
