Numerical simulation on dynamic bending strength of three-graded concrete beam based on meso-mechanics |
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| Authors: | TIAN Ruijun DU Xiuli PENG Yijiang |
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| Institution: | Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology,Beijing 100022,China |
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| Abstract: | To study the bending strength of mass concrete under dynamic loading, the pure bending zone of three-graded concrete beam is considered as a three-phase composite composed of matrix, aggregate and interface between them on meso-level. Dynamic constitutive model considering strain-rate strengthening effect and damage softening effect is adopted to describe the cocrete and meso-element's damage. The failure mechanisms of beam under impact loading, triagle wave load, dynamic load coupling with initial static loading were simulated by using displacement-controlled FEM. Furthermore, stress-strain curve of the specimens and their dynamic bending strength were obtained. The results obtained from numerical simulation agreed well with experimental data. |
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| Keywords: | concrete beam meso-mechanics dynamic bending strength numerical simulation |
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