文献类型：期刊文献

中文题名：国产日本落叶松正交胶合木抗弯弹性模量评价方法

英文题名：Evaluation Methods of Bending MOE of Cross-Laminated Timber Made from Domestic Japanese Larch Lumber

作者：龚迎春[1] 田兆鹏[1] 徐俊华[1,2] 武国芳[1] 任海青[1]

第一作者：龚迎春

机构：[1]中国林科院木材工业研究所;[2]西南林业大学设计学院

年份：2018

卷号：32

期号：3

起止页码：1-4

中文期刊名：木材工业

外文期刊名：China Wood Industry

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：国家重点研发计划"绿色建筑及建筑工业化"(2017YF C0703501)

语种：中文

中文关键词：正交胶合木;抗弯弹性模量;跨高比;无损检测;剪力类比法

外文关键词：cross-laminated timber;MOE;span/depth ratio;nondestructive testing;shear analogy method

分类号：S791.223;S781.2

摘要：采用国产日本落叶松锯材制备正交胶合木(CLT),分别采用静力法和纵向振动法测定CLT抗弯弹性模量,并采用剪力类比法预测等效抗弯刚度,分析无损检测技术和理论计算的可行性与准确性。结果表明:静力法测试时随着跨高比的增加,CLT的抗弯弹性模量呈现递增趋势,建议跨高比≥24;动态抗弯弹性模量均高于静态抗弯弹性模量,相对误差在10%以内;剪力类比法能够有效预测CLT等效抗弯刚度,预测值和实测值相对误差在±5%以内。
Domestic Japanese larch lumber was used to prepare cross-laminated timber(CLT)samples.Modulus of elasticity(MOE)was tested using a static method and longitudinal vibration.Shear analogy was also used to predict effective bending stiffness.Feasibility and accuracy of nondestructive testing technology and theoretical calculation were analyzed.Testing results showed that:1)MOE was improved by increasing the span/depth ratio and should be more than 24;2)Dynamic MOE was higher than static MOE with less than 10%of relative error;3)Effective bending stiffness of the CLT samples was predicted by shear analogy with less than 5%of relative error between predicted and measured values.