混杂纤维水泥基复合材料断裂分析  

Fracture analysis of hybrid fiber reinforced cementitious composites

作　　者：陈瑛[1] 姜弘道[1] 朱为玄[1] 冯新权[2] 

机构地区：[1]河海大学土木工程学院,江苏南京210098 [2]山东省水利勘测设计院,山东济南250013

出　　处：《河海大学学报（自然科学版）》2005年第5期571-574,共4页Journal of Hohai University(Natural Sciences)

摘　　要：基于纤维水泥基材料的桥联法则(桥联应力裂纹张开位移关系)和K叠加原理,建立了混杂纤维水泥基复合材料的桥联裂缝模型,并针对三点受弯梁建立了简化的断裂分析模型.桥联裂缝模型能够描述混杂纤维水泥基复合材料断裂全过程的裂缝扩展规律,灵活地分析不同纤维对断裂韧度的贡献,并可以计算混杂纤维水泥基复合材料裂纹尖端应力强度因子、断裂韧度和临界缝长.A crack bridging model was presented to predict the fracture behavior of hybrid fiber reinforced cementitious composites （HFRCC）. The model was based on the K-superposition method and the crack bridging law, i.e. the stresscrack width relationship of the material. A simple fracture analysis model was established for HFRCC beam under threepoint bending load. The model is successful in description of crack propagation during the whole fracture process of HFRCC and analysis of the contribution of different fibers to the fracture toughness. With the model, the critical crack length, the critical stress intensity factor, and the fracture toughness of HFRCC can also be calculated.

关 键 词：混杂纤维 水泥基 断裂分析 

分 类 号：TU37[建筑科学—结构工程]