Static behavior of stud shear connectors in elastic concrete-steel composite beams

Abstract

Elastic concrete was first introduced into steel-concrete composite beams due to its superior deformability. The static behavior of stud shear connectors embedded in elastic concrete is studied in this paper. Eighteen push-out tests were conducted to evaluate the load-slip behavior, bearing capacity and ultimate slip of shear studs. Four different rubber contents, 0%, 5%, 10% and 15% were taken into consideration. Test results show that the ductility of stud improves significantly with the increasing rubber content. Especially, when the rubber content reaches 10%, the shear stud has relatively high bearing capacity, better deformation and better ductility. In specimens with 5% rubber content elastic concrete, shear stud shows a more ductile behavior embedded in lower compressive strength elastic concrete and the diameter has little influence on ductility and stiffness of studs. The equations provided by AASHTO LRFD, Eurocode-4 and GB50017-2003 can still apply to shear studs embedded in elastic concrete. Compared with the experimentally obtained bearing capacities, AASHTO LRFD is confirmed to be the closest one.