摘要
从细观尺度研究受拉水泥基复合材料中倾斜纤维的桥联行为,以分析承受轴向拉伸的随机各向分布纤维增强混凝土的力学性能。将单根随机纤维的理论解在三维空间进行积分运算有效描述受拉纤维混凝土的受力过程。给出了拉拔力、拉拔总功与裂纹张开位移和纤维倾斜角的函数关系。结果表明,增加纤维的倾斜角度会降低纤维的裂纹桥联力,拉拔力和拉拔总功的理论计算结果与试验结果有较好的一致性。
The crack-bridge behavior of inclined steel fibers in the cementitious composites was researched in the meso scale to analyze the mechanical behavior of random distribution fiber reinforced concrete which carries the pull out force. The theoretical solution of a single fiber distributed randomly was integrated in the 3D space to describe the change course of the pull out fiber concrete. The function relation of the pull out force, pull out work value with crack open displacement and fiber inclined angle was presented. Increasing the inclination angle of fiber will depress the crack-bridge force. The theoretical values of the pull out force and pull out work are consistent with the experimental values.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2008年第5期147-150,共4页
Acta Materiae Compositae Sinica
基金
辽宁省教育厅A类项目(05L365)
教育部春晖计划项目及国家留学基金委资助
关键词
纤维混凝土
裂纹张开位移
约束参数
变位约束
细观模型
fiber reinforced concrete
crack opening displacement
engagement parameter
variable engagement
micromeehanical model
