重组竹销槽承压性能试验研究

吴鸿森; 王刚; 马怀纲; 张明; 赵仕兴; 余志祥; 陈述伟; 陈柯民; 张小龙; 杨姝姮

doi:10.3724/j.gyjzG24102104

重组竹销槽承压性能试验研究

doi: 10.3724/j.gyjzG24102104

1. 西南交通大学土木工程学院, 成都 610031;
2. 四川省建筑设计研究院有限公司, 成都 610095;
3. 四川竹元科技有限公司, 四川眉山 620366;
4. 四川能投智慧光电有限公司, 成都 610097

基金项目:

四川省科技计划重点研发项目(2023YFS0393)。

详细信息

作者简介:
吴鸿森,硕士研究生,主要从事重组竹节点连接力学性能究。

通讯作者:
张明,zhangming@home.swjtu.edu.cn。

计量
- 文章访问数: 24
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- 被引次数: 0
出版历程
- 收稿日期: 2024-10-21
- 网络出版日期: 2025-04-02

Experimental Study on the Dowel-Bearing Properties of Bamboo Scrimber

1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;
2. Sichuan Provincial Architectural Design and Research Institute Co., Ltd., Chengdu 610095, China;
3. Hongya Bamboo Era Technology Co., Ltd., Meishan 620366, China;
4. SCEI Smart OPTOELECTRONIC Co., Ltd., Chengdu 610097, China

摘要

摘要: 基于慈竹和毛竹两类典型竹种的重组竹销槽承压性能试验,补充验证了竹种、荷载-纤维夹角(LFD)、密度、销栓直径等因素对重组竹销槽承压性能的影响,并对比分析了两类竹种的销槽力学性能及其计算方法的适用性。结果表明:LFD接近0°时重组竹均以纤维胶层直接受剪破坏为主,LFD接近90°时转为纤维弯曲带动胶层受剪破坏,裂纹扩展随LFD增大而加剧,其中毛竹基试件破坏更显著,在LFD为45°时裂纹穿透性更强;随着销栓直径增大重组竹的破坏程度加剧,其中毛竹基更为明显,低密度重组竹试件更易出现早期破坏;慈竹基重组竹试件的刚度和强度均高于毛竹基的,两类竹种重组竹销槽承压刚度均随LFD增大而下降,但慈竹基试件在LFD大于75°时刚度回升,强度则在LFD为45°达到最低值后回升;销栓直径增大时,慈竹基刚度提升但强度下降,毛竹基刚度和强度均先增后减。基于研究结果,构建了适用于不同LFD及销栓直径的慈竹基和毛竹基重组竹销槽承压性能的计算模型。
- 重组竹 /
- 销槽承压强度 /
- 销槽承压刚度 /
- LFD /
- 销栓直径
Abstract: Based on existing experimental investigations of the dowel-bearing properties of two typical bamboo species bambusa eiemeiensis and phyllostachys edulis, supplemented with additional tests to verify influencing factors including bamboo species, load-to-fiber direction angle (LFD), density, and dowel diameter. A comparative analysis was conducted on the mechanical properties and applicability of calculation methods for both bamboo scrimber types. The results indicated: at LFD approaching 0°, bamboo scrimber primarily failed through direct shear failure of fiber-adhesive layers, transitioning to fiber bending-induced shear failure of adhesive layers when LFD approached 90°. Crack propagation intensified with increasing LFD, with phyllostachys edulis-based specimens exhibiting more pronounced failure. At LFD 45°, cracks demonstrated stronger penetration. Increased dowel diameter exacerbated bamboo scrimber failure, particularly in phyllostachys edulis-based materials. Low-density specimens were prone to premature failure. Bambusa emeiensis-based bamboo scrimber exhibited higher stiffness and strength than phyllostachys edulis-based counterparts. Both bamboo scrimbers showed decreasing dowel-bearing stiffness with increasing LFD, though bambusa emeiensis-based specimens exhibited stiffness recovery at LFD >75°. The strength reached its minimum at LFD 45° before rebounding. Increased dowel diameter enhanced stiffness but reduced strength in bambusa emeiensis-based materials, while phyllostachys edulis-based materials increased at first and then decreased in both stiffness and strength. Based on the above results, a calculation model for the dowel-bearing performance of both bamboo scrimber types with different LFDs and dowel diameters were established ultimately.
- bamboo scrimber /
- dowel-bearing strength /
- dowel-bearing stiffness /
- LFD /
- dowel diameters

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