摘要
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 parameter values of K＆C model were generally taken from foreign literatures, not considering the effect of concrete strength grade and element size. Based on the related experimental results, a method to determine the strength parameters of K＆C model was proposed. The damage evolution parameters was adjusted to make the numerical calculation result more reasonable. In the simulation of reinforced concrete slab under blast loading by arbitrary Lagrangian-Eulerian capability of ANSYS/LSDYNA, the material parameters of K＆C model were determined by the proposed method. The comparison between numerical simulation and experimenta results shows that using the proposed method to determine the strength parameters is correct.
出处
《力学季刊》
CSCD
北大核心
2015年第3期517-526,共10页
Chinese Quarterly of Mechanics
