文献类型：期刊文献

中文题名：杉木人工林规格材的足尺弯曲、压缩分级测试

英文题名：Full Size Bending and Compression in-Grade Tests on Dimension Lumber of Cunninghamia lanceolata Plantation

作者：龙超[1] 吕建雄[1] 任海青[1] 江京辉[1] 骆秀琴[1]

第一作者：龙超

机构：[1]中国林业科学研究院木材工业研究所国家林业局木材科学与技术重点实验室

年份：2008

卷号：44

期号：8

起止页码：95-99

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金："十一五"国家科技支撑项目(2006BAD18B07);国家科学技术部林业工程技术标准体系构建子课题(2004DEA70900-1)

语种：中文

中文关键词：杉木人工林;规格材;分级测试

外文关键词：Cunninghamia lanceolata plantation; dimension lumber; in-grade test

分类号：S781.2

摘要：利用人工林杉木制成尺寸为45mm×90mm×2600mm规格材,根据GB/T50329、ASTMD4761分别进行足尺弯曲、压缩分级测试。结果表明,规格材的弯曲弹性模量(MOE)、弯曲强度(MOR)、顺纹压缩强度(UCS)平均值均表现出相似趋势:SS>No.2>No.1。SS等级、No.1等级和No.2等级规格材的MOE特征值分别是10.34、9.87和10.17GPa;MOR特征值分别是26.93、20.25和20.74MPa;UCS特征值分别是21.59、20.64和20.33MPa;随着MOR增加,UCS/MOR降低;与无疵小试样测试相比,足尺规格材的SS等级、No.1等级和No.2等级的MOE平均值分别是无疵小试样的1.13、1.08和1.12倍;MOR平均值分别是无疵小试样的84.8%、70.8%和78.7%;UCS平均值分别是无疵小试样的81.1%、74.3%和75.9%。
In this paper, bending and compression in-grade tests were conducted on 45 mm× 90 mm × 2 600 mm dimension lumber made of Cunninghamia lanceolata plantation according to GB/T 50329, ASTM D4761 respectively. The results showed that average bending modulus of elasticity （MOE）, average bending modulus of rupture （MOR）, average compression strength parallel to the grain（UCS） of dimension lumber presented such similar trend as SS grade the highest, then No. 2, No. 1 the least. As far as SS,No. 1 ,No.2 grade was concerned, characteristic value of MOE was 10.34,9.87,10.17 GPa respectively, characteristic value of MOR was 26.93,20.25,20.74 MPa respectively, characteristic value of UCS was 21.59,20.64,20.33 MPa respectively. In addition, the ratio of UCS to MOR ratio decreased when MOR increased. When full-size test results were compared with that of small clear specimen, it was found that average MOE of SS, No. 1, No. 2 grade of the former was 1.13, 1.08,1.12 times the latter, average MOR of the former was 84.8% , 70.8% ,78.7% of the latter, average UCS of the former was 81.1%, 74.3% ,75.9% of the latter.