测定混凝土应变软化曲线的J积分法

DETERMINING CONCRETE STRAIN-SOFTENING CURVE BY THE J-INTEGRAL METHOD

摘要: 本文提供用普通材料试验机对含有不同初始裂缝深度混凝土劈裂试件进行断裂试验的结果。试验得到了稳定的荷载位移全过程曲线。求得了断裂韧度J_IC、δ_C、断裂能G_F;并由J积分法推导出了混凝土材料的拉应变软化曲线。

Abstract: With the ordinary material testing machine, the fracture testing results of the concrete wedge splitting specimen are presented in this paper. Consistent load-displacement curves are obtained, and the fractUre toughness J_IC,δ_C, fracture energy G_F are determined,then the concrete strain-softening curve is deduced by using the J-integral method.