摘要
主要提出了一种新型的异型纤维拉拔界面模型,完成了整个拉拔过程中拉拔荷载与拉拔位移的对应计算。同传统的异型纤维拉拔计算模型相比,本模型不仅考虑到了拉拔过程中由于纤维的塑性变形而且考虑到了界面压力变化导致的界面摩擦变化所引起的荷载阻抗,此外,模型中还量化模拟了基体材料的剥落损伤行为及其对载荷释放的影响。最后从计算模拟结果与试验结果的对比来看,本模型具有较好的适应性。
In this paper, a new theoretical micro-mechanical model for analysis of hooked steel fibers is developed to predict the rational pullout load versus fiber end slip relationship. The mechanism of plastic bending of fiber and the additional frictional bond due to bending as well as the damageable deformations of matrix are taken into account. A good agreement between the predictive and experimental results confirms the validation of this model.
出处
《工程力学》
EI
CSCD
北大核心
2004年第6期102-107,共6页
Engineering Mechanics
关键词
纤维混凝土
异型钢纤维
拉拔全曲线
摩擦
基体
fiber reinforced concrete
hooked fiber
pullout curve
additional friction
matrix
