摘要
胶合竹家具,如落地衣架和落地灯,存在着主杆节点的强度不足和美观度不佳等问题。植筋连接技术被广泛认为可以显著提升竹木构件节点的抗拔性能,而且由于其内置的特性,不会影响外形美观。尽管胶合竹植筋连接技术在建筑领域的方形梁柱节点中得到了广泛应用,但本研究旨在将这一技术应用于产品领域的胶合竹家具圆杆节点。在改变胶合竹植筋节点的形状后,需要通过试验分析来确定各项合理化设计参数,以提升节点的抗拔性能。选取胶合竹植筋圆杆为研究对象,以植筋边距、胶层厚度、植筋长径比等因素为研究变量。采用拉-拉模式进行抗拔性能试验,记录试件破坏模式和节点极限荷载。在试验过程中,出现胶合竹劈裂破坏、植筋拔出破坏和植筋屈服破坏3种破坏模式。研究结果表明:为防止胶合竹劈裂破坏,胶合竹与植筋直径之比应不小于8;节点极限荷载受胶层厚度影响显著,但胶层厚度不宜过大,当植筋直径为4 mm时,胶层厚度可设置为1.0~1.5 mm;节点极限荷载随着植筋长径比增加而提高,对于直径为4和8 mm的植筋杆,屈服破坏的临界植筋长径比均可取为15。基于试验结果,本研究提出了胶合竹植筋节点极限荷载预测方程,计算值与试验值较为接近。
The widespread adoption of green and eco-friendly principles has led to a growing attention of applying glubam materials in the furniture manufacturing industry.However,the issue of connection joints in glubam furniture has always been a significant factor limiting its performance.Glubam furniture,such as floor hangers and floor lamps,suffer from insufficient strength of the main pole joints and poor aesthetics.Previously,the glubam glued-in rod connection was mainly used for square beam-column joints in constructions.Glued-in rods connection technique has been widely recognized to significantly improve the pull-out strength of bamboo and timber component joints.It does not affect the aesthetic appearance due to its built-in characteristic.Although the glued-in rods connection technique has been widely used in square beam-column joints in the construction,this study aimed at applying this technique to glubam furniture round pole joints in the product area.After changing the shape of the glubam glued-in rod joints,it is necessary to determine the rationalized design parameters through experimental analysis in order to improve the pull-out strength of the joints.In this study,round poles with glubam glued-in rods were selected as research objects,the factors such as edge distance of the glued-in rod,thickness of the gluing layer and slenderness ratio of the glued-in rod were considered as research variables.Specimens in pull-pull configuration were tested and the failure modes of the specimens and the ultimate loads of the joints were recorded.It was observed that the specimens exhibited three different failure modes,including glubam cracking,shear failure along the rod and yielding of the rod.The test results showed that the ratio of the diameter of the glubam to that of the glued-in rod should be not less than eight to prevent glubam cracking.The glue thickness had a significant effect on pull-out strength,but it should not be too large.When the diameter of the glued-in rod is 4 mm,the glue thickness can be set t
作者
吴宇飞
梁家年
WU Yufei;LIANG Jianian(Institute of Sci-Tech History and Meteorological Civilization,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Art,Nanjing University of Information Science and Technology,Nanjing 210044,China)
出处
《林业工程学报》
CSCD
北大核心
2024年第2期143-151,共9页
Journal of Forestry Engineering
基金
国家社科基金后期资助项目(19FYSB037)。
关键词
胶合竹
植筋
家具圆杆
抗拔性能
节点设计
glubam
glued-in rod
furniture round pole
pull-out strength
joint design