文献类型：会议论文

英文题名：Bending strength adjustments for moisture content for Chinese fir structural lumber

作者：Zhou, Haibin[1] Ren, Haiqing[1] Lv, Jianxiong[1] Jiang, Jinghui[1] Wang, Xunshun[2]

第一作者：周海宾

通信作者：Zhou, H.

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing 100091, China; [2] College of Sciences, Beijing Forestry University, Beijing 100083, China

会议论文集：11th World Conference on Timber Engineering 2010, WCTE 2010

会议日期：June 20, 2010 - June 24, 2010

会议地点：Trentino, Italy

语种：英文

外文关键词：Lumber - Materials properties - Moisture - Moisture determination - Timber

年份：2010

摘要：Moisture adjustment is an important step for establishing the allowable properties for structural lumber. ASTM D1990 provides the procedures for adjusting dimension lumber design properties for moisture content. It may be advisable to scale property adjustments for species with substantially different properties from the Douglas-fir and Southern pine. For Chinese fir dimension lumber, it is difficult to get the property adjustment according to these procedures. In the paper, Chinese fir dimension lumbers were sorted into three matched test groups by dynamical modulus of elasticity. Three groups were conditioned to different moisture contents, respectively. Then bending strength property of dimension lumbers was tested in full size. The models between bending strength vs. moisture content relationships were developed and compared with other models developed earlier. Simplified procedures were provided for adjusting bending strength of Chinese fir dimension lumber for moisture content which is suitable for materials properties codes or standards.