Numerical analysis on shear stud in push-out test with crumb rubber concrete

Abstract

Crumb rubber concrete slabs and steel beams connected by single-headed studs were investigated in this paper. An accurate numerical analysis based on ABAQUS was developed to derive nonlinear material properties and damage plasticity models of concrete with four different rubber contents and reasonable contact algorithms. The reliability of the numerical analysis was verified based on our previous experimental work, and an extensive parametric study was conducted. The analysis results for the stud nominal strengths were compared with those specified in AASHTO LRFD and EUROCODE-4. Furthermore, the typical stress mechanism of the stud in push-out test and the relationship of the tensile force and bending moment that the stud bears were achieved. The bending deformation of the stud was proven to be larger in the crumb rubber concrete. Finally, the effect of welding defect was studied systematically. The results show that the bottom welding defect of the stud is the most dangerous one, especially on the ultimate slip and ductility of the stud.