摘要
本文运用白光散斑技术分级测定了混凝土试样Ⅰ-Ⅱ复合型断裂的位移场,并对断裂过程区进行跟踪观察,探讨了断裂机理,据此建立起Ⅰ-Ⅱ复合型断裂虚拟裂纹模型.本文还以四点剪切和直偏缝三点弯曲两种试样,测录了Ⅰ-Ⅱ复合型荷载位移F～δ全曲线,并计算出不同复合状态下的断裂能G_F^(Ⅰ-Ⅱ).
In this paper , the displacement field and the cracking propagation zone of Ⅰ - Ⅱ mixed model of concrete are measured by white light speckle technique. The FCM of Ⅰ - Ⅱ mixed model has been obtained for four-point shear and three-point bending specimens , the fracture energy G_F^(Ⅰ-Ⅱ)in different mixed states are also calculated.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1991年第2期29-36,共8页
Journal of Hohai University(Natural Sciences)
基金
自然科学基金
关键词
混凝土
虚拟纹模型
断裂能
white light speckle technique
Ⅰ-Ⅱ mixed model
fracture energy
fictituous crack model(FCM)
