新型超高强钢筋连接套筒的性能试验与研究

将多种规格的600 MPa级高强热轧钢筋与直螺纹套筒相结合,基于4种直径的高强钢筋与套筒共45个试件的组合试验成果,得到套筒在钢筋机械连接方式下的单向拉伸试验、高应力反复拉压试验及大变形反复拉压试验各阶段性能的表现数据,相关数据均可满足规范规定。同时,将相同直径高强钢筋采用普通与新型套筒连接的试验结果进行了对比。性能试验的结果可为完善钢筋机械连接计算理论、修订结构设计、推广高强钢筋等技术应用提供参考依据,实现可持续发展。

Performance Test and Study on a New Type of High Strength Steel Bar Connection Sleeve

A variety of 600 MPa high strength hot rolled steel bars are combined with straight thread sleeves.The combination test results of 45 specimens with 4 kinds of diamet er high strength steel bars and sleeves show that the performance data of the sleeve in the uniaxial tensile test,high stress repeated tension compression test and large deformation repeated tension compression test under the mechanical connection mode of reinforcement can meet the requirements of the specification.At the same time,the test results of the same diameter high strength steel bar with ordinary sleeve connection and new sleeve connection are compared.The results of the performance test can provide reference for improving the calculation theory of mechanical connection of steel bars,revising the structural design,promoting the application of high strength steel bars and other technologies,so as to achieve sustainable development.