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通过对活性粉末混凝土试件的静载和抗折疲劳试验,得到试件的极限承载力、抗折强度及疲劳寿命,分析试件的破坏模式和裂缝发展演变过程;通过试验发现活性粉末混凝土试件疲劳变形发展规律分为3个阶段,其疲劳变形第一阶段的疲劳寿命比普通混凝土提高约为5%;对活性粉末混凝土试件的疲劳寿命进行威布尔分布检验,提出考虑失效概率的p-S-N曲线方程,由此曲线方程得出活性粉末混凝土的疲劳极限强度可取其抗折强度的58.8%。
The ultimate bearing capacity, flexural strength and fatigue life of the specimens were obtained through static and flexural fatigue tests of the reactive powder concrete specimens. The failure modes and the development and evolution of the cracks were analyzed. It was found through the tests that the reactive powder concrete Fatigue deformation of the law is divided into three stages, the fatigue life of the first stage of fatigue deformation than ordinary concrete increased by about 5%; fatigue life of reactive powder concrete specimens Weibull distribution test, put forward to consider the probability of failure pSN Curvilinear equation, curve equation derived from the activity of the ultimate strength of the fatigue strength of powder concrete can take 58.8% of its flexural strength.