冲击载荷下钢筋混凝土力学行为的研究

发布时间：2018-04-02 16:42

本文选题：钢筋混凝土　切入点：落锤冲击测试　出处：《高压物理学报》2016年02期

【摘要】：基于钢筋混凝土梁受落锤冲击实验结果,提出了损伤型动态本构模型。该模型以混凝土黏弹性本构特性为基础,为了考虑钢筋的作用以及梁的损伤特性,将钢筋增强因子和损伤变量引入理论模型中,最终得出了以应变、应变率、损伤变量和配筋率为控制变量的钢筋混凝土本构模型。将该动态模型运用于非弹性弯曲梁理论分析中,通过数值求解得出了梁跨中挠度时程曲线,与实验结果相吻合。
[Abstract]:Based on the experimental results of reinforced concrete beams subjected to impact of drop hammer, a damage dynamic constitutive model is proposed.The model is based on the viscoelastic constitutive characteristics of concrete. In order to consider the effect of steel bar and the damage characteristic of beam, the reinforcement factor and damage variable are introduced into the theoretical model, and the strain rate and strain rate are obtained.The constitutive model of reinforced concrete with damage variable and reinforcement ratio as control variable.The dynamic model is applied to the theoretical analysis of inelastic bending beams, and the time-history curves of the mid-span deflection of beams are obtained by numerical solution, which is in agreement with the experimental results.
【作者单位】：北京理工大学爆炸科学与技术国家重点实验室;中北大学机电工程学院;太原理工大学材料强度和结构冲击山西重点实验室;
【基金】：国家自然科学基金重大项目(11390360,11390362)
【分类号】：TU375.1;O347.3

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