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中文摘要：
利用一级轻气炮对钢筋混凝土靶板进行冲击压缩实验研究,采用Lagrange分析方法对实验数据进行处理,得到流场中各力学量的分布规律。实验结果表明在配筋率较低的情况下,钢筋的加入对混凝土的动态压缩性能改善不明显。但是随着配筋比率的提高,钢筋混凝土的动态压缩强度及延性均有较明显的提高。因此认为钢筋混凝土的动态性能是钢筋的强化作用和其引入所带来的混凝土内部的初始损伤共同作用的结果。基于该实验现象和前人的工作,给出了钢筋混凝土的损伤型动态本构关系,理论预测曲线与实验结果吻合良好。
英文摘要：
The dynamic compressive properties of reinforced concrete were investigated experimentally by one-stage light gas gun. In order to get the distributions of other mechanical parameters in the specimen, the experimental data were processed by the Lagrangian analytical method. The experimental results show that there is no improvement of dynamic compressive behavior of the concrete by adding reinforcing steel web in the range of reinforced ratio; however, the dynamic compressive strength and ductibility of the reinforced concrete increase greatly when the reinforced ratio increases. Thus it is considered that the dynamic behavior of reinforced concrete is greatly influenced by the reinforcement of steel and the increase of initial damage by adding steel web to the concrete. Base on these observations and theoretical work made by previous researchers, a dynamic constitutive relation of reinforced concrete including damage evolution was established. Theoretical estimation results agree reasonably well with the experimental data.
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