环的直径压缩分析瓜达瓦竹在横平面上爬行
Jhonathan A Duque1, Jose J Garcia1
1Escuela de Ingeniería Civil y Geomática, Universidad Del Valle, Edificio E48, Ciudad Universitaria, Melendez, Cali, Colombia.
Heliyon
|February 23, 2024
概括
在持续负荷下,竹在横平面上表现出显著的爬行变形. 这项研究量化了这种爬行,发现它比轴向曲爬行高2-3倍,影响结构完整性.
科学领域:
- 材料科学 材料科学 材料科学
- 结构工程 结构工程
- 生物材料是一种生物材料.
背景情况:
- 瓜达瓦 (Guadua angustifolia) 是一种可持续的建筑材料.
- 在持续负荷下,竹子的爬行会影响结构性能.
- 在Guadua angustifolia的横向爬行行为并未得到充分理解.
研究的目的:
- 在横平面上描述Guadua angustifolia的爬行行为.
- 在直径压缩下量化变形和故障特征.
- 评估粘弹性模型适用于横向爬行的适用性.
主要方法:
- 经过60个瓜达瓦木叶环的直径压缩.
- 随着时间的推移 (长达90天) 测量直径移位.
- 将数据与一般化的麦克斯韦和伯格斯粘弹性模型相匹配.
主要成果:
- 流离失所并没有在90天内稳定下来,这表明流离失所正在持续增加.
- 横向爬行变形是轴向曲爬行的2-3倍.
- 粘弹性模型参数可以从30天的测试中可靠地确定.
- 在爬行下失败应力和应力与静态测试显著不同.
结论:
- 在Guadua angustifolia中,大量的横向爬行可以随着时间的推移减少关节的性和容量.
- 粘弹性模型,特别是麦克斯韦和汉堡的模型,可以描述这种行为.
- 30天的爬行测试足以进行参数估计.
- 这些发现对于在横向负荷下设计耐用的竹结构至关重要.
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