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OALib Journal期刊
ISSN: 2333-9721
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spf规格材弹性模量概率分布及其力学性能评价
DOI: 10.3969/j.issn.1000-2006.2014.02.030, PP. 157-160
Keywords: 针叶木规格材,振动法,弹性模量,威布尔分布,力学性能
Abstract:
应用瞬态激振法实测了针叶木规格材(spf)的弹性模量,并对弹性模量进行了威布尔分布的拟合检验。结果表明:spf规格材松木试件的弹性模量遵循威布尔分布,应用拟合检验确定的威布尔参数,估算了总体弹性模量均值、标准离差和弹性模量在给定值下的概率。根据gb5005―2003木结构设计规范及确定的威布尔参数,评价了总体二级spf规格材松木试件达到二级材ⅱc的可靠度为95.9%,即推算总体松木试件弹性模量达不到二级材ⅱc的概率为4.1%。
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