Defining parameters for concrete damage plasticity model

Sümer, Yusuf; Aktaş, Muharrem

doi:10.20528/cjsmec.2015.07.023

Cited by 44 publications

(39 citation statements)

References 6 publications

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“…This concept is successfully used for modeling plain concrete (PC) and RC with a rebar. In this model, the compressive crushing and tensile cracking of the concrete material were considered as the main two failure mechanisms [ 14 , 15 , 16 , 18 ]. The material parameters associated with the CDP model were the flow potential eccentricity (ξ = 0.1), stress ratio (σ bo /σ co = 1.16), Kc = 0.667, and dilatation angle (ψ = 35) [ 14 , 19 , 20 ].…”

Section: Numerical Modellingmentioning

confidence: 99%

Flexural Response and Failure Analysis of Solid and Hollow Core Concrete Beams with Additional Opening at Different Locations

2021

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It is essential to make openings in structural concrete elements to accommodate mechanical and electrical needs. To study the effect of these openings on the performance of reinforced concrete (RC) elements, a numerical investigation was performed and validated using previous experimental work. The effect of the position and dimension of the opening and the beam length on the response of the beams, loads capacities, and failure modes was studied. The simulated RC beams showed different responses, loads capacities, and failure modes depending on the position and dimension of the opening. The transversal near support opening (TNSH) and longitudinal holes (LH) showed lower effects on the load capacities of the beams than the transversal near center opening (TNCH). The supreme reduction percentages of the load capacity (µu%) for beams with TNCH and TNSH were 37.21% and 30.34%, respectively (opening size = 150 × 150 mm2). In addition, the maximum µu% for beam with LH was 17.82% (opening size = 25% of the beam size). The TNSH with a width of less than 18.18% of the beam shear span (550 mm) had trivial effects on the beam’s load capacities (the maximum µu% = 1.26%). Although the beams with combined LH and TNCH or LH and TNSH showed different failure modes, they experienced nearly the same load reductions. Moreover, the length of the beam (solid or hollow) had a great effect on its failure mode and load capacity. Finally, equations were proposed and validated to calculate the yield load and post-cracking deflection for the concrete beams with a longitudinal opening.

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Section: Numerical Modellingmentioning

confidence: 99%

Flexural Response and Failure Analysis of Solid and Hollow Core Concrete Beams with Additional Opening at Different Locations

2021

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“…The uniaxial behavior of concrete in compression was defined using a relationship between the compressive stresses and their corresponding inelastic strains. Based on the ABAQUS documentation, the compressive strain (ε c ) was converted to the inelastic strain (ε ∼in c ) to define this relationship by employing Equation (2).…”

Section: Concrete Compressive Behaviormentioning

confidence: 99%

“…Various constitutive numerical models were presented to simulate the concrete behavior in tension and compression [ 1 , 2 , 3 , 4 , 5 ]. Y. Nikaido [ 6 ] improved a constitutive numerical model to simulate concrete behavior by considering compression stiffness recovery.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear ABAQUS Simulations for Notched Concrete Beams

2021

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The numerical simulation of concrete fracture is difficult because of the brittle, inelastic-nonlinear nature of concrete. In this study, notched plain and reinforced concrete beams were investigated numerically to study their flexural response using different crack simulation techniques in ABAQUS. The flexural response was expressed by hardening and softening regime, flexural capacity, failure ductility, damage initiation and propagation, fracture energy, crack path, and crack mouth opening displacement. The employed techniques were the contour integral technique (CIT), the extended finite element method (XFEM), and the virtual crack closure technique (VCCT). A parametric study regarding the initial notch-to-depth ratio (ao/D), the shear span-to-depth ratio (S.S/D), and external post-tensioning (EPT) were investigated. It was found that both XFEM and VCCT produced better results, but XFEM had better flexural simulation. Contrarily, the CIT models failed to express the softening behavior and to capture the crack path. Furthermore, the flexural capacity was increased after reducing the (ao/D) and after decreasing the S.S/D. Additionally, using EPT increased the flexural capacity, showed the ductile flexural response, and reduced the flexural softening. Moreover, using reinforcement led to more ductile behavior, controlled damage propagation, and a dramatic increase in the flexural capacity. Furthermore, CIT showed reliable results for reinforced concrete beams, unlike plain concrete beams.

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“…Numerical analysis of tested beams was carried out using FE software ABAQUS, in which a physically non-linear analysis was taken into account modelling concrete-UHPFRC/RC composite beams. This software have been tested with ordinary RC structures and also with UHPFRC [8,17,25,26]. 3-dimensional model was created for composite beams numerical analysis.…”

Section: Fe Model Descriptionmentioning

confidence: 99%