摘要
为了配合《水工混凝土断裂试验规程》在工程界的推广使用,提出了双K断裂模型中在临界状态时分布在虚拟裂缝上的粘聚力σ(x)产生的粘聚韧度KcIc的二元拉格朗日插值计算方法,进而由准脆性材料韧度三参数定律计算了混凝土起裂韧度KiInci。与粘聚韧度KcIc积分计算和简化计算方法的比较,表明此插值计算方法具有很高的精度,计算过程简化,使用计算器即可实现,便于工程人员实际使用。
To extend the application of concrete fracture test norm in engineering, a bivariate Lagrangian interpolation function method for determining double-K fracture model cohesion toughness K, of which caused by the cohesive force σ（x） along the fictitious crack zone in the critical state, is proposed. Then the initiation toughness KIc^c can be easily evaluated using the three-parameter law of toughness in quasi- brittle materials. Compared with the values of cohesion toughness KIc^c calculated by the numerical inte- gration, this interpolation method is of high accuracy. Further, the calculation of K is simplified much more, all calculations can be performed with a pocket calculator and it is very convenient for practical engineers.
出处
《计算力学学报》
EI
CAS
CSCD
北大核心
2010年第1期47-52,共6页
Chinese Journal of Computational Mechanics
基金
国家自然科学基金(50178015)
国家自然科学基金重点(50438010)资助项目
