摘要
本文研究混凝土Ⅰ型裂缝断裂和损伤全耦合分析的迭代方法。首先将Mazars给出的混凝土在静力作用下的损伤本构关系进行了推广,考虑了线弹性断裂力学和Mazars损伤模型的耦合关系,推导出了混凝土Ⅰ型裂纹尖端附近损伤因子的表达式,然后根据其表达式对大体积混凝土断裂韧度试验中的混凝土试件进行了实例计算,得到了损伤因子的等值线图,由此可以确定完全损伤区和损伤区的范围。在分析等值线图后,得出了可用迭代方法对混凝土Ⅰ型裂缝进行断裂和损伤全耦合分析的结论。
An iterative method for fully coupled fracture-damage analysis of mode Ⅰ cracking in concrete is proposed. In this method the fracture and damage constitutive equation of concrete under static load suggested by Mazars is extended and the linear elastic fracture mechanics is coupled with Mazars＇ damage model to deduce the expression of damage factor The method is used to calculate the damage of damaged zone and completely damaged zone arc may conclude that the proposed iterative method concrete with mode Ⅰ cracking. in the field of the tip of mode Ⅰ cracking in concrete. the concrete sample for fracture toughness test. The determined according to the damage factor contours. It can be applied to analyze the fracture and damage of concrete with mode Ⅰ cracking.
出处
《水利学报》
EI
CSCD
北大核心
2007年第2期205-210,共6页
Journal of Hydraulic Engineering
基金
国家自然科学基金资助项目(50225927)
关键词
混凝土
断裂
损伤
耦合
concrete
fracture-damage coupled analysis 210
iterative method
cracking
