The Finite-Element Analysis for CFRP and Steel Bar Strain in the Strengthened Concrete Slab

Abstract

This paper studies the mechanical behavior of Carbon-fiber-reinforced polymer (CFRP) in one-way reinforced concrete slabs, and the relation of CFRP and steel bar strain under the uniformly distributed load. Based on the theoretical analysis of the constitutive relationship, the analysis calculation model was built by using the ABAQUS software. Data analysis demonstrates that under the same conditions the load-strain curves of CFRP and steel bar are similar, which indicates that the mechanical cooperation performance of CFRP and steel is mutually beneficial. The load-strain curve of CFRP and steel bar is linear before the steel bended, and the curve is approximately linear after the steel bended. In the reinforced stage, the curve is again linear and the strain rate of the CFRP and steel bar increases constantly with the increase of load. This result is valuable for related studies.