文献类型：期刊文献

英文题名：Reliability Analysis for the Bending Strength of Larch 2×4 Lumber

作者：Zhong, Yong[1,2] Ren, Haiqing[1,2]

第一作者：钟永

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100090, China; [2] Research Institute of Forestry New Technology, Chinese Academy of Forestry, Beijing, 100090, China

年份：2014

卷号：9

期号：4

起止页码：6914-6923

外文期刊名：BioResources

收录：EI(收录号：20212410499430)

语种：英文

外文关键词：Probability distributions - Reliability analysis - Bending strength - Bending tests - Method of moments

摘要：A safety analysis for Larch (Larix gmelinii) 2×4 lumber, based on the requirements of Chinese national standards, is presented in this paper. Static, third-point bending tests were conducted using an MTS universal testing machine. The bending strength was adjusted to 15% moisture content (MOR15) and was fitted with three different probability distribution models. The best fitting MOR15 model for Larch 2×4 lumber possessed lognormal distribution. Furthermore, a procedure for calculation of a reliability index (β) was developed using the first-order second-moment method. Results of reliability analysis indicated that the reliability index decreased nonlinearly as both the design value of bending strength increased and the reduction of live to dead load ratio (ρ). Finally, it was suggested that the design values for the bending strength of Larch 2×4 lumber were 18.4 MPa for grade SS, 11.6 MPa for grade No.1, 12.7 MPa for grade No.2, and 10.3 MPa for grade No.3, to meet the target reliability level. ? 2014. All Rights Reserved.