连续配筋混凝土路面横向裂缝分布模型的研究

连续配筋混凝土路面(CRCP)在我国有了一定的应用,其设计还未完全采用基于可靠性理论的概率设计法。通过对我国早期的两条CRCP试验路调查,运用可靠性理论与数理统计方法,编制程序分析了横向裂缝间距、宽度的状况,得出相应变异范围和概率分布模型,为建立基于可靠性理论的连续配筋混凝土路面设计提供科学依据。研究结果表明:横向裂缝间距的概率分布模型符合对数正态分布,其变异范围为0.500~0.932;横向裂缝宽度的概率分布模型符合正态分布,其变异范围为0.202~0.384。

Study on the Probability Distribution Model of Continuously Reinforced Concrete Pavement Transverse Cracks

Since Continuously Reinforced Concrete Pavement(CRCP) has got some application in China,probabilistic design based on reliability theory has not been used completely in the design procedure.Based on the investigation of the two CRCP of the earlier period and the reliability theory and mathematical statistics methods,the authors analyze the transverse cracks interval and width.The research finds out the variation scope and the probability distribution model of cracks interval and width,so they can provide a scientific foundation for the CRCP design based on reliability theory.The results show that the probability distribution model of crack spacing is the Logarithm normal distribution model,the probability distribution model of crack width is the Normal distribution model,with the variation factor changing from 50.0% to 93.2% for the crack spacing data and from 20.2% to 38.4% for the crack width data.