[1]郝丹,王佳阳,付帅,等.高湿环境下杨木单板层积材销槽的承压性能[J].森林与环境学报,2020,40(05):554-560.[doi:10.13324/j.cnki.jfcf.2020.05.014]
 HAO Dan,WANG Jiayang,FU Shuai,et al.Dowel-bearing capacity of poplar laminated veneer lumber in a high-humidity environment[J].,2020,40(05):554-560.[doi:10.13324/j.cnki.jfcf.2020.05.014]
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高湿环境下杨木单板层积材销槽的承压性能()
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《森林与环境学报》[ISSN:2096-0018/CN:35-1327/S]

卷:
40
期数:
2020年05期
页码:
554-560
栏目:
出版日期:
2020-09-15

文章信息/Info

Title:
Dowel-bearing capacity of poplar laminated veneer lumber in a high-humidity environment
作者:
郝丹12 王佳阳12 付帅12 陈泽华12 董浩然12 杨小军12
1. 南京林业大学材料科学与工程学院, 江苏 南京 210037;
2. 江苏省林业资源高效加工利用协同创新中心, 江苏 南京 210037
Author(s):
HAO Dan12 WANG Jiayang12 FU Shuai12 CHEN Zehua12 DONG Haoran12 YANG Xiaojun12
1. College of Materials and Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China;
2. Co-Innovation Center of Efficient Processing and Utilization of Forestry Resource, Nanjing, Jiangsu 210037, China
关键词:
高湿环境单板层积材销槽承压性能
Keywords:
high humiditylaminated veneer lumberpin slotbearing capacity
分类号:
S781.21TU366.2
DOI:
10.13324/j.cnki.jfcf.2020.05.014
摘要:
高湿环境是造成木结构建筑节点损伤的主要因素之一,为研究高湿环境下单板层积材销槽承压性能,以国产杨木为试验对象,采用不同直径的平滑销和螺纹销,对杨木单板层积材进行单调加载试验,研究高湿环境下销类型以及销直径对杨木单板层积材销槽承压性能的影响。结果表明:直径较大的螺纹销与平滑销在横纹方向的破坏特征表现为试件两端出现齿形开裂,顺纹方向表现为试件沿着半圆孔方向纵向劈裂。顺纹方向销槽承压性能受环境湿度影响较大,湿度为95%时,销槽承压强度和初始刚度下降幅度最大,分别为25%和30%。高湿环境下,螺纹销承压强度小于平滑销承压强度;随着平滑销直径的增大,横纹方向销承压强度减小,初始刚度先增大后趋于稳定。高湿环境下单板层积材销槽承压强度预测值宜采用欧洲木结构设计规范计算方法。
Abstract:
A high-humidity environment is one of the main factors that damages wooden structure joints. Therefore, to study the dowel-bearing capacity of laminated veneer lumber in a high-humidity environment, the domestic poplar was used as the study object, and the different diameters of smooth and screw pins were used to carry out monotonic loading tests on the laminated veneer lumber. The influence of the pin types and diameters on the dowel-bearing capacity of the lumber was also studied. The test results showed that the failure modes of the screw pins and the wider smooth pins manifested as tooth-shaped cracks at both ends of the test pieces in perpendicular grain direction, while the fracture pattern showed that the specimen is split longitudinally along the parallel direction. The dowel-bearing capacity, parallel to the direction of the grain in the wood, was greatly affected by the humidity of the environment, particularly when the latter was 95%; bearing strength and initial stiffness decreased obviously, by 25% and 30% respectively. In a high-humidity environment, the screw pin had a lower bearing strength than the smooth pin; the bearing strength decreased and the initial stiffness increased first and then tends to be stable as the diameter of the smooth pin increased perpendicular to the grain. The predicted values of the dowel compressive strength of laminated veneer lumber in high humidity environment should be adopted based on the Eurocode 5 calculation method.

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相似文献/References:

[1]李志慧,戚兴来,王云华,等.开缝处理聚丙烯无纺布增强单板层积材的研究[J].森林与环境学报,2019,39(04):349.[doi:10.13324/j.cnki.jfcf.2019.04.003]
 LI Zhihui,QI Xinglai,WANG Yunhua,et al.Reinforcing laminated veneer lumber with cut nonwoven polypropylene fabric[J].,2019,39(05):349.[doi:10.13324/j.cnki.jfcf.2019.04.003]

备注/Memo

备注/Memo:
收稿日期:2020-06-11;改回日期:2020-07-13。
基金项目:国家自然科学基金项目(31300484)。
作者简介:郝丹(1996-),女,硕士研究生,从事木材加工与木结构建筑工程研究。Email:1090978483@qq.com。
通讯作者:杨小军(1978-),男,副教授,从事木材加工与木结构建筑工程研究。Email:yxj5460@163.com。
更新日期/Last Update: 1900-01-01