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Structural Engineering and Mechanics Volume 56, Number 6, December25 2015 , pages 917-938 DOI: https://doi.org/10.12989/sem.2015.56.6.917 |
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Quantitative impact response analysis of reinforced concrete beam using the Smoothed Particle Hydrodynamics (SPH) method |
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S.N. Mokhatar, Y. Sonoda, A.B.H. Kueh and Z.M. Jaini
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| Abstract | ||
| The nonlinear numerical analysis of the impact response of reinforced concrete/mortar beam incorporated with the updated Lagrangian method, namely the Smoothed Particle Hydrodynamics (SPH) is carried out in this study. The analysis includes the simulation of the effects of high mass low velocity impact load falling on beam structures. Three material models to describe the localized failure of structural elements are: (1) linear pressure-sensitive yield criteria (Drucker-Prager type) in the pre-peak regime for the concrete/mortar meanwhile, the shear strain energy criterion (Von Mises) is applied for the steel reinforcement (2) nonlinear hardening law by means of modified linear Drucker-Prager envelope by employing the plane cap surface to simulate the irreversible plastic behavior of concrete/mortar (3) implementation of linear and nonlinear softening in tension and compression regions, respectively, to express the complex behavior of concrete material during short time loading condition. Validation upon existing experimental test results is conducted, from which the impact behavior of concrete beams are best described using the SPH model adopting an average velocity and erosion algorithm, where instability in terms of numerical fragmentation is reduced considerably. | ||
| Key Words | ||
| erosion; impact loading; modified Drucker-Prager; RC beam; smoothed particle hydrodynamics | ||
| Address | ||
| S.N. Mokhatar: Jamilus Research Center, Faculty of Civil and Environmental Engineering, University Tun Hussein Onn Malaysia, 86400, Batu Pahat, Johor, Malaysia Y. Sonoda: Structural Analysis Laboratory, Department of Civil Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukoka, Japan A.B.H. Kueh and Z.M. Jaini: Construction Research Centre, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia | ||