钢筋套筒灌浆连接性能试验研究及筒壁应力分析

发布时间：2018-06-16 06:46

本文选题：预制装配式结构 + 套筒灌浆连接　；参考：《工程力学》2017年10期

【摘要】：完成了12个钢制套筒灌浆连接件的拉拔试验,系统研究了其破坏过程与破坏形态、荷载-位移曲线、套筒应变等,重点分析了锚固长度、钢筋直径对筒壁应力的影响。运用厚壁圆筒理论,明确套筒灌浆连接件中钢筋与灌浆料以及套筒之间的传力过程,并基于轴向拉力建立了筒壁纵、横向应力的计算模型。研究表明:套筒灌浆连接件破坏过程分为弹性、屈服、强化、颈缩四个阶段,屈服强度和极限强度与钢筋材性相近。随钢筋锚固长度增加,筒壁应力略有减小,且随着钢筋直径增加,筒壁的应力明显增大。同时,建议筒壁应力计算值与试验值吻合较好,可为钢筋套筒灌浆连接设计与研究提供借鉴。
[Abstract]:The drawing test of 12 steel sleeve grouting joints was completed. The failure process and the damage form, the load displacement curve, the sleeve strain and so on were systematically studied. The influence of the length of the anchorage and the diameter of the steel bar on the stress of the wall was emphatically analyzed. The theory of thick wall cylinder was used to clarify the relationship between the steel bar and the grouting material and the sleeve. The study shows that the failure process of the sleeve grouting connector is divided into four stages: elastic, yield, reinforcement and necking. The yield strength and ultimate strength are similar to that of the steel bar. With the increase of the length of reinforcement, the stress of the tube wall decreases slightly and increases with the diameter of the steel bar. In addition, the stress of cylinder wall is obviously increased. At the same time, it is suggested that the calculated value of wall stress is in good agreement with the experimental value, which can provide reference for the design and research of reinforcement sleeve grouting connection.
【作者单位】：长安大学建筑工程学院;
【基金】：国家自然科学基金项目(51578072) 陕西省自然科学基金项目(2016JM5070) 陕西省科技统筹创新工程计划项目(2015KTZDSF03-04,2015KTZDSF03-05-01) 西安市科技计划项目(CXY1512(6)) 中央高校基本业务费项目(310828163410)
【分类号】：TU756

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