Experimental Research on Mechanical Performance of Rebar Sleeve Grouting Connector

Abstract

The rebar sleeve grouting connector is an important vertical connection component in the fabricated structure. This paper focuses on the study of the mechanical performance of the reinforcement sleeve grouting connector under unidirectional loading and high-stress cyclic loading. Through experimental analysis, the researcher studied the mechanical properties and anchoring mechanism of a total of 54 rebar sleeve grouting connectors with 2 test methods, 9 sizes, and 3 defect types under unidirectional loading and high-stress cyclic loading. The test results show that there occurred two types of failure, namely, rebar fracture and bond-slip. To be more specific, the specimens with anchorage lengths of 8.0 d and 7.0 d both encountered the result of rebar fracture, which meets the relevant regulations on the strength and deformation of the joints of the level-I connection in Technical Specification for Mechanical Connection of Steel Bars (JGJ 107-2010); and the test pieces with the anchorage length of the steel bar of 6.0 d all had the steel bond-slip failure, which does not meet the requirements of the specification.