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混凝土K&C模型材料参数一般取国外文献中的原始数值,没有根据混凝土强度等级和单元尺寸的不同而作相应的调整.根据相关的试验研究成果,提出了一种确定K&C模型强度参数值的方法,并阐述了K&C模型损伤参数值的调整方法,使得数值计算结果更加合理.运用有限元显式动力分析软件ANSYS/LSDYNA,采用流固耦合方法模拟爆炸荷载作用下钢筋混凝土板的动态响应,混凝土K&C模型取本文确定的参数值,计算结果与试验结果吻合较好,从而验证了K&C模型材料参数取值的正确性.
The material parameters of concrete K & C model generally take the original values in foreign literature and are not adjusted according to the concrete strength grade and unit size.According to the related experimental results, a method to determine the strength parameter values of K & C model is proposed, And the adjustment method of K & C model damage parameter is described to make the numerical calculation more reasonable. The dynamic response of reinforced concrete slab under blast load is simulated by using the finite element explicit dynamic analysis software ANSYS / LSDYNA. The dynamic response of concrete K & C The model takes the parameter values determined in this paper, and the calculated results are in good agreement with the experimental results, which verifies the correctness of the material parameters of the K & C model.