Numerical Investigation of Load‐Carrying Capacity of GFRP‐Reinforced Rectangular Concrete Members Using CDP Model in ABAQUS

Abstract

The present work demonstrates the nonlinear finite element analysis (NLFEA) of 13 concentrically and eccentrically loaded short rectangular concrete column specimens reinforced with GFRP and conventional steel bars. GFRP bars are lightweight having the high tensile strength and high corrosion resistance. An NLFEA model for the rectangular concrete specimens was developed using the commercial software ABAQUS Standard and calibrated for different materials and geometric parameters based on the previous experimental test results of the studied specimen. The behavior of reinforced concrete was modelled using the concrete damaged plasticity (CDP) model, the behavior of steel bars was simulated as a bilinear elastoplastic material, and the GFRP bars were considered as a linear elastic material. After the calibration of CDP parameters, the control sample was used for the further numerical parametric analysis to investigate the effect of critical parameters, i.e., the area of concrete (Ac), the compressive strength of concrete (fc′), and the ratio of longitudinal reinforcement (ρl) and transverse reinforcement (ρt) on the load-carrying capacity of columns. The results show that the selected NLFEA model can simulate the behavior of columns accurately and there was good agreement of numerical results obtained from ABAQUS Standard with the experimental results.

Sustainable FRP-Confined Symmetric Concrete Structures: An Application Experimental and Numerical Validation Process for Reference Data

“…The finite element crack patterns were represented through maximum principal plastic strains because the concrete damaged plasticity model (CDPM) assumes that the cracks in the concrete start when there is a positive value of maximum principal plastic strain. The FEA cracks in concrete can also be represented by tensile principal stresses [2,46]. Figure 11 represents the cracking patterns of a plain concrete cylinder, a double-layered FRP cylinder with strength of 12.5 MPa and two cylinders with single and double layers of FRP sheets having the concrete strength of 16.5 MPa.…”

“…The repairing, strengthening and ductility enhancement of RC compression members is one of the most popular applications of the FRP composites in both corrosive and seismic environments [1]. The advantages of the FRP composites include corrosion resistance, lightweight, high strength to weight ratio, durability, chemical resistance, dimensional stability and electromagnetically neutral [2]. The factors affecting the FRP confinement are elastic modulus of FRP (E f ), thickness of FRPs (nt), angle of orientation of FRP wraps, and unconfined strength of concrete material ( f co ) [3].…”

USPs on Damage Reduction of Concrete Railway Sleepers

“…Concrete damage plasticity (CDP) model was selected for this study as CDP can represent the inelastic behavior of concrete in both compression and tension including damage characteristics. CDP model is based on mainly two failure mechanisms which are crushing of concrete during compression and cracking of concrete during tension [12]. As shown in Fig.…”

Finite Element Analysis over Geopolymer Concrete using Abaqus

“…Abaqus comprises of modeling features, processing options and post processing animation display options which allows the users to simulate the behavior of their profound product and predict its functions. This feature can be advantageously utilized for understanding load deflection behavior, cracking pattern, stress strain curve [9][10][11][12][13]. In this research work, an investigation has been conducted on the flexural behavior of Geopolymer concrete and the ordinary conventional cement concrete on various parameters such as load deflection behavior and cracking pattern.…”