Experimental study on performance of grouted sleeve connection with surfacing forming under high stress repeated tension-compression load

In order to study the mechanical properties and working mechanism of grouted sleeve connection under the high stress repeated tension-compression action, four splice specimens were designed and manufactured by using sleeves with surfacing welding and slotted rebars. The high stress cyclic loading test and uniaxial tensile test were carried out. The results show that the residual deformation of specimens is about 0.1 mm after 20 cycles. The splice has a relatively stable and reliable performance. The high stress repeated tension-compression has no effect on the failure mode and bearing capacity of the splice, but has a certain influence on the deformation performance of the splice. The stiffness of the splice before rebar yielding is reduced by about 40%, and the elongation at failure is increased by about 26%. The strain distribution curve of the steel rebar in the sleeve end section is obviously different under tension and compression. After 20 cycles, the strain values of the rebars in the sleeve end section tend to be the same under the maximum tension load. The high stress repeated tension-compression has no effect on the axial strain and circumferential strain of the sleeve. The restraint effect of the sleeve before the rebar yielding is not obvious. © 2022, Editorial Office of Journal of Building Structures. All right reserved.