Nonlinear numerical simulation of bonded steel-concrete composite beams by finite element analysis

The steel-concrete composite beam bonded by adhesive has its particular advantages over the traditional composite beam. Based on the experimental observation of push-out test, the shear connection behaviour of concrete-adhesive interface is modelled by nonlinear springs, whereas the steel-adhesive interface is assumed connected perfectly. Then a three-dimensional nonlinear finite element model for mechanical behaviour simulation of bonded steel-concrete composite beams is presented. Finally, the proposed numerical model is validated through comparisons between numerical results and experiment data.