NUMERICAL MODEL FOR FRACTURE PROCESS OF CONCRETE WEDGE-SPLITTING SPECIMEN
Concrete is a kind of tensile strain-softening material. There is a fracture process zone near the crack tip with cohesive stresses. The Fictitious Crack Model (FCM) is suitable to represent the characteristics. But the theoretical solution of FCM can not be easily yielded out. Based on the Duan-Nakagawa’s model, the problem can be well resolved by using the weight integral method. The model has proposed a new concept of finite stress concentration near the crack tip and a fracture process zone model with continuously stress distribution and crack opening displacement. In this paper, the fracture process of concrete wedge-splitting specimen is simulated by Duan-Nakagawa’s model taking the one times weight function. Calculation result shows that the whole process from crack initiation, extension to failure is well agreed with the test.
Li Yunfeng Duan Shujin
College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingda Shijiazhuang Railway Institute, Shijiazhuang 050043, China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）