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      Finite Element Analysis of RC Beams by the Discrete Model and CBIS Model Using LS-DYNA

      1 , 2 , 2 , 3
      Advances in Civil Engineering
      Hindawi Limited

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          Abstract

          There are several techniques to simulate rebar reinforced concrete, such as smeared model, discrete model, embedded model, CLIS (constrained Lagrange in solid) model, and CBIS (constrained beam in solid) model. In this study, however, the interaction between the concrete elements and the reinforcement beam elements is only simulated by the discrete model and CBIS (constrained beam in solid) model. The efficiency and accuracy comparisons are investigated with reference to the analysis results by both models provided by LS-DYNA explicit finite element software. The geometric models are created using LS-PrePost, general purpose preprocessing software for meshing. The meshed models are imported to LS-DYNA where the input files are then analyzed. Winfrith and CSCM concrete material options are employed to describe the concrete damage behavior. The reinforcement material model is capable of isotropic and kinematic hardening plasticity. The load versus midspan deflection curves of the finite element models correlate with those of the experiment. Under the conditions of the same level of accuracy, the CBIS model is evaluated to have the following advantages over the discrete model. First, it has the advantage of reducing the time required for FE modeling; second, saving computer CPU time due to a reduction in total number of nodes; and third, securing a good aspect ratio of concrete elements.

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          Most cited references9

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          LS-Dyna Theory Manual.

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            An introduction to *CONSTRAINED_BEAM_IN_SOLID

            H. Chen (2016)
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              LS-DYNA Keyword User’s Manual Version 970

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                Author and article information

                Contributors
                Journal
                Advances in Civil Engineering
                Advances in Civil Engineering
                Hindawi Limited
                1687-8094
                1687-8086
                February 22 2021
                February 22 2021
                : 2021
                : 1-9
                Affiliations
                [1 ]National Disaster Management Research Institute, 365 Jongga-Ro, Jung-gu, Ulsan 44538, Republic of Korea
                [2 ]Department of Civil Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeonbuk 38541, Republic of Korea
                [3 ]School of General Education, Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeonbuk 38541, Republic of Korea
                Article
                10.1155/2021/8857491
                7e16d868-c19d-4dc7-9367-77a97ecf9524
                © 2021

                https://creativecommons.org/licenses/by/4.0/

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