%0 Journal Article
%T Semi-analytical element method for double-K fracture parameters computations in concrete<br>混凝土双K断裂参数计算的半解析有限元法
%A Wang Chengqiang Zheng Changliang State Key Laboratory of Structural Analysis of Industrial Equipment
%A <br>王承强
%A 郑长良
%J 力学学报
%D 2004
%I 
%X The double-K tracture criterion describes initiation, stable propagation and unstable propagation of cracks in concrete structures. The corresponding double-K fracture parameters (initial cracking roughness K_(IC)~(ini) and unstable fracture toughness K_(IC)~(ini)) introduced in the criterion are determined using a simple experiment method combing with an analytical evaluation based on the cohesive force on the fictitious crack zone. Based on the Hamiltonian governing equations of plane elasticity for sectorial domain, the variable separation and eigenfunction expansion techniques are employed to develop a novel analytical finite element for the fictitious crack propagation linear force model in fracture mechanics of concrete in this paper. The new analytical element can be implemented into FEM program systems to solve computational problems of double-K fracture parameters for concrete cracked plane structures with arbitrary shapes. Numerical results indicate that the method is efficient and accurate.
%K concrete
%K cohesive force
%K double-K fracture parameters
%K Hamiltonian system
%K semi-analytical finite element method<br>混凝土
%K 粘聚力
%K 双K断裂参数
%K 哈密顿体系
%K 半解析有限元法
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=4100DA4A1A3BA1B0CE5AD99AE1DFB420&aid=3CEF181080895303&yid=D0E58B75BFD8E51C&vid=933658645952ED9F&iid=E158A972A605785F&sid=3081401A9FAB9CE2&eid=6B3068A7C27BD349&journal_id=0459-1879&journal_name=力学学报&referenced_num=2&reference_num=5