Tensile Capacity of Head-splice Sleeve Connection after a Repeated Axial Stress for Precast Concrete Construction

摘要

This paper presents the tensile behaviors of Head-Splice Sleeve (HSS) connections after the experience of the low level of repeated axial stresses. HSS is a mechanical connection which was developed to be used for bar connection in precast concrete element. As a required structural capacity of HSS for using in column member, the stiffness degradation should not appear under low stress level of repeated load. Four type of HSS specimen were made for bars of D22, D25, D29, D35 and low cycle test was performed. From the test, it was found that HSS connections have a sufficient strength to induce the bar tensile failure after the experience of a repeated axial loads. The tensile strength of majority of specimens has higher strength than 125% of design yield strength of bars which is required for mechanical connector in Codes.