Three-Dimensional Numerical Modeling of Single-Lap Direct Shear Tests of FRCM-Concrete Joints using a Cohesive Damaged Contact Approach
The bond behavior of fiber-reinforced cementitious matrix (FRCM) composites applied as externally bonded reinforcement is the most critical concern in this type of application. FRCM-concrete joints are generally reported to fail because of debonding (slippage) of the fibers from the embedding matrix. However, depending on the characteristics of the composite and substrate used, failure may also occur as a result of detachment of the composite strip at the FRCM-support interface, interlaminar failure (delamination) of the matrix, or tensile failure of the fibers. In this paper, a three-dimensional (3D) numerical model is developed to reproduce the behavior of polyparaphenylene benzo-bisoxazole (PBO) FRCM-concrete joints. The numerical model accounts for the fracture mechanics mixed Mode-I and Mode-II loading condition observed in single-lap direct shear tests by means of nonlinear damaged contact law associated with different interfaces considered in the analysis. The numerical results obtained are compared with those obtained by experimental tests of PBO FRCM-concrete joints. The model is capable of predicting the different failure modes, and it correctly reproduces the experimental load responses including the contribution of friction to the applied stress.
C. Carloni et al., "Three-Dimensional Numerical Modeling of Single-Lap Direct Shear Tests of FRCM-Concrete Joints using a Cohesive Damaged Contact Approach," Journal of Composites for Construction, vol. 22, no. 1, American Society of Civil Engineers (ASCE), Feb 2018.
The definitive version is available at https://doi.org/10.1061/(ASCE)CC.1943-5614.0000827
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Concretes; Elasticity; Fibers; Finite element method; Fracture mechanics; Interfaces (materials); Reinforced concrete; Reinforcement; Cementitious matrices; Embedding matrices; Fabrics/textiles; Fiber/matrix bonds; Interlaminar failures; Polyparaphenylenes; Three dimensional (3D) numerical models; Three-dimensional numerical modeling; Numerical models; Fiber-reinforced cementitious matrix (FRCM); Finite-element analysis (FEA)
International Standard Serial Number (ISSN)
Article - Journal
© 2018 American Society of Civil Engineers (ASCE), All rights reserved.
01 Feb 2018