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根据可靠度理论确定轻型木结构齿板连接抗剪承载力设计指标时,需先确定其概率分布。选择轻型木结构连接普遍使用的一种国产齿板及北美二级SPF规格材,进行了五个角度的齿板连接抗剪承载力试验;并以两种分布拟合检验方法,结合残差平方和分析。结果显示,齿板连接抗剪承载力的概率分布为对数正态分布,通过参数估算和分布检验,最终确定均值与标准值的比值K及其变异系数,为后续可靠度分析和确定设计值提供依据。
According to the reliability theory to determine the design index of shear bearing capacity of light wood structure tooth plate connection, we must first determine its probability distribution. Choose a kind of domestic tooth plate commonly used in light wood structure connection and North American two-level SPF specification material, carry out five angles of tooth plate connection shear capacity test; and two distribution fitting test method, combined with residual square And analysis. The results show that the probability distribution of shear resistance of tooth plate connection is lognormal distribution. Through the parameter estimation and distribution test, the ratio of the mean value to the standard value K and its coefficient of variation are finally determined, which is used for subsequent reliability analysis and design value determination Provide evidence.