Numerical Simulation on the Effect of Bound Slip in Reinforced Concrete Structures

Numerical Simulation on the Effect of Bound Slip in Reinforced Concrete Structures

To compute the deformation of reinforced concrete(RC) structures, the vector form intrinsic finite element(VFIFE) method of analysis was adopted in this study. The effect of bound slip in the interface of the concrete and the reinforcing steel was considered. The RC structure was modeled using three types of element in the VFIFE method. At first, the two-dimensional(2D) solid element was used to model the deformation of the concrete. In addition, an equivalent uniaxial strain model by Darwin and Pecknold(year) can effectively simulate the nonlinear monotonic loading behavior of the concrete material. For the second type, the truss elements were adopted to model the deformation of the reinforcing steel using elastic-plastic material model. And last, to model the effect of bond-slip on the interface of concrete and reinforcing steel, the bond-link element was used between the node of a 2D solid element and a truss element. Comparison of results from the test on RC structural element(simply-supported beam) under monotonic loadings and the numerical results using the VFIFE method are presented to demonstrate both the capability and the accuracy of VFIFE method in modeling the response of RC structures.