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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JIC、δC、断裂能GF；并由J积分法推导出了混凝土材料的拉应变软化曲线。
This article provides the results of fracture testing of concrete cracked specimens with different initial crack depths using common material testing machines. The whole load curve of the stable load displacement was obtained by the test. The fracture toughness JIC, δC and fracture energy GF were obtained. The J-integral method was used to derive the tensile strain softening curves of the concrete.