【摘要】 本文在室内混凝土梁弯曲疲劳试验的基础上,通过对试验结果的统计分析,证实了混凝土弯曲疲劳寿命的概率分布基本上符合两参数威布尔分布;探讨了疲劳方程的形式;分析了高低应力比R和失效概率P对疲劳规律的影响;并进而建立了考虑高低应力比R和失效概率P的弯曲疲劳方程。更多还原

【Abstract】 Flexural fatigue tests were carried out on concrete beams and the data were analyzed in an attempt to develop the relationship for concrete among stress level S,stress ratio(=σ_mtn/σ_max), number of cycles to failure N, and failure probability P. It is found that the probability distribution of N is in good agreement with the two-parameter Weibull distribution, and this relationship c an be expressed in log-log form as well as semilog form, and the log-log relationship is better for extrapolation than the semilog one.更多还原