Experimental and Numerical Modelling of Shear Behaviour of Full-scale RC Slabs Under Concentrated Loads

Nana, W.S.A.; Bui, Tan Trung; Limam, Ali; Abouri, Salim

doi:10.1016/j.istruc.2017.02.004

Cited by 45 publications

(29 citation statements)

References 19 publications

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Section: Validation Studies Against Experimental Benchmarkssupporting

confidence: 55%

“…With the original values of stiffness, an overly stiff behavior was observed regardless of the slab. This is also confirmed in the numerical simulations of the authors of the experimental campaign, using a concrete damage plasticity (CDP) model in combination with an explicit solver in the commercial finite element analysis (FEA) showing the response using the traditional incremental-iterative procedure(implicit) and the explicit solver, and yellow circular dot denoting the reference point for end of brittle failure and (B) the damage plots from SLA of half of the slab at the reference point program ABAQUS, 25 shown in Figure 14A. The flexible mortar bedding layer between the steel reaction support system and the slab was pointed out to be the source of this discrepancy.…”

Section: Resultsmentioning

confidence: 99%

“…Figure A additionally shows two other responses. One of the same FEM (material and modeling parameters as well) simulated using a traditional implicit solver (with a Newton‐Raphson iteration scheme that would converge to an energy norm of 0.0001) in combination with an arc‐length control in order to highlight the problems of non‐convergence, and the other of a rather fine FEM with the CDP material model based explicit solver response . Both do not give any insight into the post peak behavior that is rather well captured with the SLA procedure.…”

Section: Validation Studies Against Experimental Benchmarksmentioning

confidence: 99%

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Non‐proportional loading in sequentially linear analysis for 3D stress states

Pari

Hendriks

Rots

2019

Numerical Meth Engineering

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Summary Sequentially linear analysis (SLA), a non‐incremental‐iterative approach towards finite element simulation of quasi‐brittle materials, is based on sequentially identifying a critical integration point in the model, to reduce its strength and stiffness, and the associated critical load multiplier (λcrit), to scale the linear analysis results. In this article, two novel methods are presented to enable SLA simulations for non‐proportional loading situations in a three‐dimensional fixed smeared crack framework. In the first approach, the cubic function in the load multiplier is analytically solved for real roots using trigonometric solutions or the Cardano method. In the second approach, the load multiplier is expressed as a function of the inclination of a potential damage plane and is deduced using a constrained optimization approach. The first method is preferred over the second for the validation studies due to computational efficiency and accuracy reasons. A three‐point bending beam test, with and without prestress, and an RC slab tested in shear, with and without axial loads, are used as benchmarks. The proposed solution method shows good agreement with the experiments in terms of force‐displacement curves and damage evolution.

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Section: Validation Studies Against Experimental Benchmarkssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Section: Validation Studies Against Experimental Benchmarksmentioning

confidence: 99%

See 1 more Smart Citation

Non‐proportional loading in sequentially linear analysis for 3D stress states

Pari

Hendriks

Rots

2019

Numerical Meth Engineering

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“…Further studies with a higher a/d ratio have also been conducted by Muttoni and Vaz Rodrigues [21], Natário et al [22], Rombach and Latte [30], Reißen and Hegger [28,26,27] to study the shear behavior of slabs under concentrated loads. However, to date shear tests on slabs under concentrated loads considered for the calibration and validation of design rules have rarely been studied [36,37].…”

Section: Introductionmentioning

confidence: 99%

Influence of uniaxial tension and compression on shear strength of concrete slabs without shear reinforcement under concentrated loads

Bui

Nana

Abouri

et al. 2017

Construction and Building Materials

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“…The experimental peak load is predicted quite well by the SLA simulation but the ductility is underestimated. However, this is not just a feature of SLA but the smeared crack approach in general as has been previously observed in another NLFEA simulation and also using a plasticity‐based approach in an explicit ABAQUS simulation . Considering the scope of the study, further information on the simulation in terms of the FE model (3D), the agreement between the experimental crack patterns and those from SLA etc., can be found in Reference…”

Section: Resultsmentioning

confidence: 55%

Two solution strategies to improve the computational performance of sequentially linear analysis for quasi‐brittle structures

Pari

Swart

Gijzen

et al. 2020

Numerical Meth Engineering

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Summary Sequentially linear analysis (SLA), an event‐by‐event procedure for finite element (FE) simulation of quasi‐brittle materials, is based on sequentially identifying a critical integration point in the FE model, to reduce its strength and stiffness, and the corresponding critical load multiplier (λcrit), to scale the linear analysis results. In this article, two strategies are proposed to efficiently reuse previous stiffness matrix factorisations and their corresponding solutions in subsequent linear analyses, since the global system of linear equations representing the FE model changes only locally. The first is based on a direct solution method in combination with the Woodbury matrix identity, to compute the inverse of a low‐rank corrected stiffness matrix relatively cheaply. The second is a variation of the traditional incomplete LU preconditioned conjugate gradient method, wherein the preconditioner is the complete factorisation of a previous analysis step's stiffness matrix. For both the approaches, optimal points at which the factorisation is recomputed are determined such that the total analysis time is minimised. Comparison and validation against a traditional parallel direct sparse solver, with regard to a two‐dimensional (2D) and three‐dimensional (3D) benchmark study, illustrates the improved performance of the Woodbury‐based direct solver over its counterparts, especially for large 3D problems.

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Experimental and Numerical Modelling of Shear Behaviour of Full-scale RC Slabs Under Concentrated Loads

Cited by 45 publications

References 19 publications

Non‐proportional loading in sequentially linear analysis for 3D stress states

Non‐proportional loading in sequentially linear analysis for 3D stress states

Influence of uniaxial tension and compression on shear strength of concrete slabs without shear reinforcement under concentrated loads

Two solution strategies to improve the computational performance of sequentially linear analysis for quasi‐brittle structures

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