Proposal of bond behavior simulation model by using discretized voronoi mesh for concrete and beam element for reinforcement

Abstract

This study proposed an analytical method based on the Three Dimensional Rigid Body Spring Model (3D-RBSM) to realistically simulate bond behavior of deformed rebar in concrete. In this method, concrete was modeled by rigid particles using a voronoi mesh with random geometry and rebar was modeled by beam element connected to concrete through a link element that was assigned a suitable local bond model. The proposed model enables to evaluate changes in internal cracking and stress distribution due to variation in cover thickness and rebar diameter. Furthermore, it can simulate the bond stress slip behavior and transition of failure modes. Based on analytical results, it was confirmed that the proposed simplified model can evaluate bond behavior like three dimensional rebar model with rib shape, consequently, it provides an economical and efficient alternative due to lesser computational elements.