Numerical Simulation of 3-D Failure Process of Reinforced Concrete Specimen under Uniaxial Tension

Abstract

The periodically distributed fracture spacing phenomenon exists in the failure process of the reinforced concrete prism under uniaxial tension. In this paper, A numerical code RFPA3D (3D Realistic Failure Process Analysis) is used to simulate the three-dimensional failure process of plain concrete prism specimen and reinforced concrete prism specimen under uniaxial tension. The reinforced concrete is represented by a set of elements with same size and different mechanical properties. They are uniform cubic elements and their mechanical properties, including elastic modulus and peak strength, are distributed through the specimens according to a certain statistical distribution. The elastic modulus and other mechanical properties are weakened gradually when the stresses in the elements meet the specific failure criterion. The displacement-controlled loading scheme is used to simulate the complete failure process of reinforced concrete. The analyses focus on the failure mechanisms of the concrete and reinforcement. The complete process of the fracture for the plain concrete prism and the fracture initiation, infilling and saturation of the reinforced concrete prism is reproduced. It agrees well with the theoretical analysis. Through 3D numerical tests for the specimen, it can be investigated the interaction between the reinforcement and concrete mechanical properties in meso-level and the numerical code is proved to be an effective way to help thoroughly understand the rule of the reinforcement and concrete and also help the design of the structural concrete components and systems.

Mechanical properties of two-way different configurations of prestressed concrete members subjected to axial loading

“…11 e Square reinforced concrete model. analysis) that was similar to the international cooperative experiment of RILEMTC 147-FMB [19] has been carried out by Zhang [42]. The displacement-controlled loading scheme was used to simulate failure process under uniaxial tension.…”

Numerical Simulation of Flexural-tensile Properties of Reinforced Concrete Beam

“…Tang and Xiang (2015) Yu et al (2015b) Mohamed and Hansen, (1999) studied the situation of crack penetrating aggregate; Liu (2003) Studied the influence of the thickness of protective layer on the fracture failure; Xu et al (2014) Wang et al (2012) Studied the influence of reinforcement ratio on rupture failure; Hu et al (2014;Hu and Mi, 2015) studied the influence of steel position on rupture failure; Hu and Mi (2015). Tang (2009), Li et al (2016 and Licheng et al (2012) studied the size effect of reinforced concrete; Zhang et al (2007) studied on the difference of mechanical properties of reinforced concrete and plain concrete in loading damage. Wang et al (2012) treat reinforced concrete beam as a three-phase heterogeneous composites material, analyzing the stress change of longitudinal carrying bar in failure mode and loading process of the beam.…”