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为了将混凝土材性试验数据更好的应用到冲击有限元仿真中,分析了常用混凝土本构关系中的应变率参数作用特点,提出了一种基于构件试验结果线性插值的混凝土动态破坏面修正方法来减小构件响应计算误差,采用两组钢筋混凝土梁侧向撞击试验标定了修正系数,并以另两组试验对标定的参数进行验证,四组仿真试验均取得良好结果。采用提出的方法,建立了评价混凝土本构关系适用性的评价体系。研究表明:提出的动态破坏面修正方法能够较好地减小构件响应计算误差,准确地反映钢筋混凝土构件在冲击碰撞情况下的力学响应;应用提出的评价体系可以有效评估混凝土本构关系的适用性。
In order to better apply the concrete material test data to the impact FEM simulation and analyze the characteristics of the strain rate parameters in the common concrete constitutive relation, a method of dynamic damage surface modification based on linear interpolation of component test results is proposed To reduce the component response calculation error. Two groups of reinforced concrete beams lateral impact test calibration of the correction factor, and the other two groups of tests to verify the calibration parameters, the four groups of simulation tests have achieved good results. Using the proposed method, an evaluation system for evaluating the applicability of the constitutive relationship of concrete is established. The research shows that the proposed method can effectively reduce the error of component response and accurately reflect the mechanical response of reinforced concrete members under impact collision. The application of the proposed evaluation system can effectively evaluate the application of concrete constitutive relations Sex.