Title: Meso-Scale Concrete Model for Failure Simulation in Glass FRP Reinforced Concrete Structures

Author(s): Sina Khodaie and Fabio Matta

Publication: Symposium Paper

Volume: 327

Issue:

Appears on pages(s): 37.1-37.12

Keywords: concrete, fracture, GFRP, LDPM, shear, size effect.

DOI: 10.14359/51713358

Date: 11/1/2018

Abstract:
This paper demonstrates a meso-scale numerical model to simulate the mechanical response of glass fiber-reinforced polymer (GFRP) reinforced concrete (RC) structures in two instances where fracture and friction phenomena play an important role, namely: (1) four-point bending load testing of scaled slender RC beams without stirrups; and (2) static push-over load testing of a RC railing post-deck connection. The Lattice Discrete Particle Model (LDPM), a meso-scale concrete model that accounts for concrete heterogeneity, and fracture and friction behavior, is considered. The RC structural models include GFRP bar elements whose interface with the surrounding concrete is described by a nonlinear bond-slip model. For GFRP-RC beams, the results of numerical simulations provide accurate estimates of load-midspan displacement response, failure load and crack pattern irrespective of beam depth up to 292 mm. This outcome highlights the promise held by this modeling approach to enable research to advance the understanding of shear force transfer mechanisms and related size effect. For the case of a representative GFRP-RC post-deck connection, the numerical simulations yielded accurate results on strength and failure mode. This outcome highlights the potential of LDPM-based numerical modeling for screening candidate designs prior to expensive crash testing.