摘要
基于混凝土裂缝前缘断裂过程区的应力场分析推导了虚裂缝模型的基本方程.根据混凝土材料的应变软化曲线或断裂能,应用数学规划法求解裂缝处于临界扩展状态时相应的断裂过程区尺寸以及外加荷载强度.本文的工作使虚裂缝模型在实际工程问题中的应用变得十分简便.
Based on the study of stress field in the fracture process zone ahead of the crack tip of concrete, the basic equations of Fictitious Crack Model are established. A mathematical programming approach is suggested in this paper to solve these equations. For given strain softening diagram or fracture energy of the material, the length of the fracture process zone and the load carrying capacity corresponding to a given length of physical crack at the critical state of crack propagation can be evaluated analytically. Calculated results match fairly well with the experimental data. This approach makes the use of Fictitious Crack Model in solving practical engineering problems more easily and conveniently.
出处
《土木工程学报》
EI
CSCD
北大核心
1995年第2期53-62,共10页
China Civil Engineering Journal
基金
国家自然科学基金资助项目
