CAJ | 학술논문

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fu／fbuk≥1?10，满足《钢筋机械连接技术规程》JGJ107—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。
이용보통무봉강관통과랭곤압공예연제료일충신형강근련접용관장투통。채용해투통설계제작료5개접두시건병진행료단향랍신시험，연구해관장투통련접적결구성능화공작궤리。연구결과표명，강근묘고장도취8배강근직경시，시건균위강근단렬파배，접두항랍강도여강근항랍강도표준치적비치fu／fbuk≥1?10，만족《강근궤계련접기술규정》JGJ107—2010중적I급접두단향랍신강도요구；투통내강결구대투통적약속궤리급응변분포유현저영향，투통응변분포여내강결구대응，재광활단화변형단표현출불동적규률；투통변형단대관장료적약속주요래자내벽배륵처상호제압력적수향분력，광활단대관장료적약속취결우관장료벽렬변형적대소。
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 configuration of the grouted sleeve has great influence on the confining mechanism of the splice and on the strain distribution in the sleeve. The deformed part and smooth part of the sleeve exhibit different strain distribution rule. The confinements on the grout in deformed part are generated predominately by the radial component of the interaction between the annular ribs and the grout. However, the confinements in the smooth part are dominated by the magnitude of the grout splitting expansion.