Nonlinear Finite Element Modeling of Reinforced Concrete Structures under Impact Loads

doi:10.14359/51663112

Cited by 10 publications

(1 citation statement)

References 16 publications

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“…The complex behavior of reinforced concrete (RC) beams under impact loading has received significant attention over the past few decades [ 1 , 2 , 3 , 4 ]. Various response parameters are responsible for characterizing the dynamic response of impacted RC beams [ 5 , 6 , 7 , 8 , 9 ]. One of the most important parameters is the peak impact force, whose correct prediction is essential to designing optimized structural elements that can mitigate the hazardous effects [ 10 , 11 , 12 , 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Predicting the Response of RC Beam from a Drop-Weight Using Gene Expression Programming

2022

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For structures and load-bearing beams under extreme impact loading, the prediction of the transmitted peak impact force is the most challenging task. Available numerical and soft computing-based methods for finding peak impact force are not very accurate. Therefore, a simple and user-friendly predictive model is constructed from a database containing 126 impact force experiments of the simply supported RC beams. The proposed model is developed using gene expression programming (GEP) that includes the effect of the impact velocity and the impactor weight. Also identified are other influencing factors that have been overlooked in the existing soft computing models, such as concrete compressive strength, the shear span to depth ratio, and the tensile reinforcement quantity and strength. This allows the proposed model to overcome several inconsistencies and difficulties residing in the existing models. A statistical study has been conducted to examine the adequacy of the proposed model compared to existing models. Additionally, a numerical confirmation of the empirical model of the peak impact force is obtained by reference to 3D finite element simulation in ABAQUS. Finally, the proposed model is employed to predict the dynamic shear force and bending moment diagrams, thus rendering it ideal for practical application.

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Section: Introductionmentioning

confidence: 99%

Predicting the Response of RC Beam from a Drop-Weight Using Gene Expression Programming

2022

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Axial Compression Performance of Reinforced Concrete Columns after Lateral Impact Load

Luan

Cao

et al. 2023

KSCE J Civ Eng

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Behavior and Modeling of Shear-Critical RC Beams under Impact Loading

Saatcı¹,

Vecchio²

2011

SP-281: Behavior of Concrete Structures Subjected to Blast and Impact

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The lack of a complete understanding of shear behavior under high dynamic conditions hindered the efforts for accurate prediction of impact behavior, since severe shear mechanisms may dominate the behavior of RC structures when subjected to impact loads. This current study involves a well-instrumented experimental program that was undertaken to contribute to our understanding of the effects of shear mechanisms on the behavior of reinforced concrete (RC) structures under impact loads. The test results showed that the shear characteristics of the RC beam specimens played an important role in their overall behavior. All specimens, regardless of their shear capacity, developed severe diagonal shear cracks, forming a shear-plug under the impact point. Furthermore, the application of the Disturbed Stress Field Model (DSFM) as an advanced method of modeling shear behavior under impact conditions is also investigated. A two-dimensional nonlinear finite element reinforced concrete analysis program (VecTor2), developed previously for static loads, was modified to include the consideration of dynamic loads such as impacts. VecTor2 analyses of the test specimens were satisfactory in predicting damage levels, and maximum and residual displacements. The methodology employed by VecTor2, based on the DSFM, proved to be successful in predicting the shear-dominant behavior of the specimens under impact.

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Nonlinear Finite Element Modeling of Reinforced Concrete Structures under Impact Loads

Abstract: The methods available in the literature for the analysis of reinforced concrete (RC)

Cited by 10 publications

References 16 publications

Predicting the Response of RC Beam from a Drop-Weight Using Gene Expression Programming

Predicting the Response of RC Beam from a Drop-Weight Using Gene Expression Programming

Axial Compression Performance of Reinforced Concrete Columns after Lateral Impact Load

Behavior and Modeling of Shear-Critical RC Beams under Impact Loading

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