混凝土塑性损伤模型参数的研究

Study on the Parameters of Concrete Damage Model

基于相关的试验研究成果,提出了一种确定混凝土塑性损伤模型(K&C模型)强度参数取值的方法.针对K&C模型损伤参数取值依赖于单元尺寸的问题,以我国混凝土规范为基准,阐述了损伤参数值的调整方法,使得数值计算结果更加合理.利用ANSYS/LSDYNA模拟混凝土常规三轴压缩试验,K&C模型分别采用本文确定和程序自动生成的强度参数值,并将计算结果与国内外试验结果比较,研究表明:采用本文提出的方法确定K&C模型强度参数值比较合理.

Based on the related experimental results , a method to determine the strength parameters of the concrete damage model （ K＆C model ） was proposed .Because , the damage evolution parameters were mesh -dependent , they were adjusted based on the code for design of concrete structures to make the numerical calculation result more reasonable .In the simulation of concrete conventional triaxial compression test by ANSYS /LS-DYNA, the strength parameters of K＆C model were determined separately by the proposed method and automatically generating method .By comparing the calculation results with the test results , the study shows that using the proposed method to determine the strength parameters is quite reasonable .