摘要
根据混凝土特性,本文提出了一种计算脆性材料三维裂缝应力强度因子的有限元方法,用以分析混凝土结构物中裂缝的稳定性及危害程度.其特点是不需要在裂缝尖端附近区域划分过细的网络,也不用引入特殊尖端单元,便于在工程中使用.本方法曾用于某拱坝坝肩裂缝稳定判别及应力重分布计算,效果良好.
Based on the characteristics of concrete, a finite element method for evaluating the stress intensity factors of three dimensional cracks in brittle materials is proposed and utilized to analyze the stability and the damage degree of the cracks in concrete structures. Its feature is no requirement both for dividing too fine mesh at surrounding region of crack tip and for using special tip element. It is convenient to be applied in engineering. This method has been used to determine the stability of cracking and to compute the stress redistribution in an arch dam. It was proven efficient.
出处
《应用力学学报》
CAS
CSCD
北大核心
1989年第3期111-118,139,共8页
Chinese Journal of Applied Mechanics
关键词
混凝土
裂纹
应力强度因子
三维
concrete
crack
stress intensity factor
finite element method
