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为探究混凝土受高温、高应变率作用后的力学响应规律,依据动态压缩试验数据,以现有静态本构模型为基础,计入高温损伤及加载速率的影响,对模型进行修正,确定相关模型系数,构建了混凝土高温作用后的动态本构模型。结果表明:该建模方法思路合理、实际可行,各工况下的模型计算曲线与实际试验曲线吻合度较高,所构建模型能够较为准确地描述混凝土受高温作用后的动态力学响应。
In order to explore the mechanical response of concrete under high temperature and high strain rate, based on the data of dynamic compression test, based on the existing static constitutive model, the influence of high temperature damage and loading rate was taken into account and the model was revised to determine the correlation model Coefficient, the dynamic constitutive model of concrete is built after the action of high temperature. The results show that the modeling method is reasonable, practical and feasible. The calculated curve of the model under each working condition is in good agreement with the actual test curve. The constructed model can accurately describe the dynamic mechanical response of concrete under high temperature.