| 爆炸荷载作用下钢筋混凝土梁的动力响应和破坏过程分析 |
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| 引用本文： | 张秀华,段忠东,张春巍.爆炸荷载作用下钢筋混凝土梁的动力响应和破坏过程分析[J].东北林业大学学报,2009,37(4). |
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| 作者姓名： | 张秀华 段忠东 张春巍 |
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| 作者单位： | 哈尔滨工业大学,哈尔滨,150090 |
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| 摘 要： | 利用显式动力有限元程序ANSYS/LS-DYNA对钢筋混凝土梁在爆炸荷载作用下的动力响应进行数值模拟,混凝土采用LS-DYNA程序中提供的三维SOLID164单元和Mat-Holmquist-Jobnson-Cook(HJc)混凝土累积损伤材料模型,钢筋采用BEAM161梁单元和等向随动强化材料模型(Mat-Plastic-Kinematic),建立离散式三维有限元计算模型.对不同配筋率钢筋混凝土梁在爆炸荷载作用下受力特性和破坏过程进行数值分析,计算中考虑了不同爆炸距离、炸药当量对结构动力响应的影响.基于LS-DYNA的数值模拟结果表明,钢筋混凝土梁在不同爆炸荷载作用下会发生不同程度的破坏,得到了影响梁破坏模式的主要影响因素,有关结论可为钢筋混凝土梁的抗爆设计及加固提供参考.
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| 关 键 词： | 钢筋混凝土梁 爆炸荷载 动力反应 破坏过程 |
Analysis for Dynamic Response and Failure Process of Reinforced Concrete Beam under Blast Load |
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| Zhang Xiuhua,Duan Zhongdong,Zhang Chunwei.Analysis for Dynamic Response and Failure Process of Reinforced Concrete Beam under Blast Load[J].Journal of Northeast Forestry University,2009,37(4). |
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| Authors: | Zhang Xiuhua Duan Zhongdong Zhang Chunwei |
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| Institution: | Zhang Xiuhua,Duan Zhongdong,Zhang Chunwei(School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,P.R.China) |
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| Abstract: | Large-scale finite element procedure LS-DYNA was used to simulate the dynamic response of reinforced concrete(RC) beam under blast load.Element type SOLID164 and Holmquist-Johnson-Cook material model were applied to analyse the mechanical behavior of concrete,and the damage and strain rate effect were considered in this model.The element type BEAM161and the isotropic and kinematic hardening plasticity material model were used to analyse the mechanical behavior of reinforcing bar.A three dimensional solid mo... |
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| Keywords: | Reinforced concrete beams Blast loads Dynamic responses Failure process |
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