LAUSR

Grouted reinforcement sleeve connection is one of the main methods to connect steels. In this article, to investigate the mechanical mechanism and behavior of grouted sleeve splices, six large-diameter grouted sleeve splices were manufactured. The connection property, failure mode, bearing capacity, damage distribution, and hoop confining mechanism were investigated through uniaxial tensile test. The performance of grouted sleeve splices was evaluated according to several indexes of quantification. It was shown that the tensile strength of the sleeve splice is equal to the tensile strength of the steel bar with an embedded length of eight times the bar diameter. Severe damage occurred at the end of the cementitious grout, with the damage depth about 8% of the total sleeve length. Based on the test results, an empirical expression of hoop confining strain along the axis direction of sleeve was proposed. The yield ratio and strength ratio of sleeve splices meet the standard requirements, and the sleeve capacity ratio varies with different bar diameter. The ductility ratio of grouted sleeve splices was all more than 4%, which could meet the earthquake-resistant need in low-moderate seismic regions.