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中文摘要：
为了研究混凝土HJC本构模型的参数取值及其参数对混凝土动态性能的影响,本文基于HJC模型原始参数,运用有限元软件ANSYS/LS-DYNA对混凝土SHPB试验进行了数值模拟,结果显示数值计算结果与试验结果存在一定的差异。据此根据模型中参数的物理意义确定出可能影响混凝土动态性能的关键参数,通过保持其他参数不变、改变关键参数的方法对混凝土SHPB试验进行数值分析,得到了各关键参数对混凝土动态性能的影响规律,并基于该分析结果对HJC模型的原始参数进行了修正。数值模拟结果表明,采用本文修正参数的计算结果与试验结果吻合良好,能较准确地反映混凝土的动态性能。
英文摘要：
To study the parameter value of HJC constitutive model and its influence on dynamic performance of concrete,the numerical simulation of concrete SHPB test,which is based on the original parameters of HJC constitutive model,was performed by using the finite element analysis software ANSYS/ LS-DYNA,and the numerical results showed a certain margin of error with the test results. Therefore, some key parameters for dynamic behavior of concrete were determined according to the physical meanings. Through changing the key parameters and maintaining the other parameters unchanged, the additional numerical analyses of concrete SHPB tests were accomplished and the influences of key parameters on the dynamic performance of concrete were obtained. Furthermore, the original parameter of HJC constitutive model was modified on the basis of the analysis results. And it can be drawn that the revised-parameter-based results agree well with the test results and can reflect the dynamic performance of concrete more accurately.
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