Bearing properties of engineered wood products I: effects of dowel diameter and loading direction
Bearing properties of engineered wood products I: effects of dowel diameter and loading direction
复制标题
工程木制品的承载性能 I：销钉直径和加载方向的影响
DOI：
10.1007/bf00831350
复制
发表时间：
2002
影响因子：
2.9
通讯作者：
K. Komatsu
中科院分区：
文献类型：
--
作者：
K. Hwang;K. Komatsu
根据 ASTM-D 5764 对具有两种弹性模量（MOE；7.8 GPa 和 9.8GPa）的单板层积材 (LVL)、平行刨花材 (PSL) 和层积材 (LSL) 进行了嵌入测试。建立了每种工程木制品 (EWP) 的载荷-嵌入关系。根据试验结果得到了承载强度（σe）、初始刚度（ke）和有效弹性地基深度的方向特性。基于弹性地基梁理论，由ke和MOE求得有效弹性地基深度(α=E/ke，E=MOE)。 90°（垂直于纹理）的 α 的计算方法为：E90[压缩测试中得到的 90° MOE，但弯曲测试中获得的平行于纹理的 0° (E0) MOE] 除以 ke90，即 90° 的初始刚度。本研究旨在获得每个 EWP 的轴承特性，同时考虑其各向异性结构，以估计销钉型紧固件的紧固强度。根据载荷嵌入曲线建立了载荷方向上的承载系数（δe，ke，α）与销钉直径之间的关系。根据嵌入测试的结果，测试的 EWP 在各个方向上都显示出与木材和胶合层压木材不同的趋势。
The embedment tests of laminated veneer lumber (LVL) with two moduli of elasticity (MOE; 7.8 GPa and 9.8GPa), parallel strand lumber (PSL), and laminated strand lumber (LSL) were conducted in accordance with ASTM-D 5764. The load-embedment relation for each of these engineered wood products (EWPs) was established. The directional characteristics of bearing strength (σe), initial stiffness (ke), and effective elastic foundation depth were obtained from the tested results. The effective elastic foundation depth (α=E/ke,E= MOE), based on the theory of a beam on elastic foundation, was obtained from thekeand MOE. An α of 90° (perpendicular to the grain) was calculated by dividingE90[MOE of 90° from the compression test, but MOE of 0° (E0), parallel to the grain, obtained from the bending test] byke90, the initial stiffness of 90°. This study aimed to obtain the bearing characteristics of each EWP, taking into consideration their anisotropic structures, for estimating the fastening strength of a dowel-type fastener. The relations between the bearing coefficients (δe,ke,α) on the loading direction and dowel diameter were established from the load-embedment curves. Based on the results of the embedment test, tested EWPs showed different tendencies in all directions from wood and glued laminated timber.