施工技术 2014年11月下 40 CONSTRUCTION TECHNOLOGY 第43卷第22期 D01:10.7672/gjs2014220040 新型变形灌浆套筒连接接头性能试验研究* 郑永峰，郭正兴1，孙志成2 (1.东南大学土木工程学院，江苏南京210096；2.山东省建筑设计研究院，山东济南250001) [摘要]利用普通无缝钢管通过冷滚压工艺研制了一种新型钢筋连接用灌浆套筒.采用该套筒设计制作了5个接 头试件并进行了单向拉伸试验，研究该灌浆套筒连接的结构性能和工作机理.研究结果表明，钢筋锚固长度取8 倍钢筋直径时，试件均为钢筋断裂破坏，接头抗拉强度与钢筋抗拉强度标准值的比值f/≥1.10，满足《钢筋机械 连接技术规程》JGJ107一2010中的I级接头单向拉伸强度要求；套筒内腔结构对套筒的约束机理及应变分布有显 著影响，套筒应变分布与内腔结构对应.在光滑段和变形段表现出不同的规律；套筒变形段对灌浆料的约束主要来 自内壁环肋处相互挤压力的竖向分力，光滑段对灌浆料的约束取决于灌浆料劈裂变形的大小. [关键词]预制装配式；套筒灌浆连接：变形灌浆套筒；预制混凝土；黏结；约束作用 [中图分类号]TU39.04 [文献标识码]A[文章编号]1002-8498(2014)22-0040-05 Experimental Study on the Behavior of Grouted Deformed Pipe Splice Zheng Yongfeng' Guo Zhengxing' Sun Zhicheng? (1.School of Civil Engineering Southeast Unirersity Nanjing Jiangsu 210096 China; 2.Shandong Prorincial Architectural Design Institute Ji'nan Shandong 250001 China) Abstract:A new type of grouted sleeve was developed with standard seamless steel tube by cold rolling depression.Five coupler specimens were prepared with the sleeve and tested under incremental tensile load and the structural performance and working mechanism of the splice were studied.The test results show that if the development length equals to eight times of the bar diameter bar fracture failure mode can be achieved.The strength of the splices meets the requirement of 110 percent of the specified tensile strength of the spliced bar for Class I splice in Technical specification for mechanical splicing of steel reinforcing bars JGJ107-2010.The inner cavity...
新型变形灌浆套筒连接接头性能试验研究.pdf
