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Numerical Simulation on Dynamic Bending Strength of Three-Graded Concrete Beam Based on Meso-Mechanics

Numerical Simulation on Dynamic Bending Strength of Three-Graded Concrete Beam Based on Meso-Mechanics
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摘要 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. 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.
作者 田瑞俊 杜修力 彭一江
机构地区 Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education
出处 《Transactions of Tianjin University》 EI CAS 2008年第5期371-375,共5页 天津大学学报（英文版）
基金 Supported by the National Natural Science Foundation(No.90510011) National Science Fund for Distinguished Young Scholars(No.50325826)
关键词 混凝土梁 弯曲强度 数字模拟 建筑结构 concrete beam meso-mechanics dynamic bending strength numerical simulation
分类号 TU375.1 [建筑科学—结构工程]
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参考文献12

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Transactions of Tianjin University
2008年 第5期

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