基于非参数法确定结构用木质材料的强度特征值  

Determination of Characteristic Strength for Structural Wood Materials by Nonparametric Method

作　　者：钟永[1,2] 江泽慧 任海青 武国芳[1,3] 赵荣军[1,3] 

机构地区：[1]中国林科院木材工业研究所,北京100091 [2]国际竹藤中心,北京100102 [3]中国林科院林业新技术研究所,北京100091

出　　处：《木材工业》2017年第6期5-9,共5页China Wood Industry

基　　金："十二五"国家科技支撑计划"结构用木质复合材料构件制造技术研究"(2015BAD14B0502)

摘　　要：强度特征值是木质材料的重要力学性能指标之一,是其在建筑结构中安全设计和合理应用的依据,根据设定的置信度水平确定。通过以正态分布生成的随机样本作为算例,采用非参数法,研究置信度水平与样本的强度变异系数、试样个数、特征值取样顺序数的相互关系,确定不同置信度水平、取样顺序数下要求的最小试样数,并提出特征值取样顺序数计算公式。The authors sought to establish a method to determine characteristic strength of structural wood materials by using the nonparametric method, to provide a scientific basis for safety design and reasonable application in wood building structures. Characteristic strength was a key mechanical property index for structural wood materials, which was determined by confidence level requirements. Random samples generated by a normal distribution were used to investigate relationships among confidence level and coefficient of variation of sample’s strength, specimen numbers in sampling, as well as statistical order for characteristic strength. Minimum number of specimens at different confidence levels and statistical order were obtained. A calculation formula for the statistical order was then developed.

关 键 词：结构用木材 强度特征值 非参数法 置信度水平 正态分布 

分 类 号：TU531.1[建筑科学—建筑技术科学]