Nonlinear Finite Element Analysis of Steel Fiber Reinforced Concrete Deep Beams

By the nonlinear finite element analysis (FEA) method the mechanical properties of the steel fiber reinforced concrete (SFRC) deep beams were discussed in terms of the crack load and ultimate bearing capacity.In the simulation process,the ANSYS parametric design language (APDL) was used to set up the finite element model;the model of bond stress-slip relationship between steel bar and concrete was established.The nonlinear FEA results and test results demonstrated that the steel fiber can not only significantly improve the cracking load and ultimate bearing capacity of the concrete but also repress the development of the cracks Meanwhile,good agreement was found between the experimenta data and FEA results,if the unit type,the parameter model and the failure criterion are selected reasonably.