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[1] Lü Qingfang, Yi Fan, Liu Ye,. Mechanical experimental study of a new CFRP grid-bamboo scrimber composite plate [J]. Journal of Southeast University (English Edition), 2024, 40 (2): 210-220. [doi:10.3969/j.issn.1003-7985.2024.02.012]
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Mechanical experimental study of a new CFRP grid-bamboo scrimber composite plate()
新型CFRP网格-重组竹复合板力学试验研究
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
40
Issue:
2024 2
Page:
210-220
Research Field:
Civil Engineering
Publishing date:
2024-06-13

Info

Title:
Mechanical experimental study of a new CFRP grid-bamboo scrimber composite plate
新型CFRP网格-重组竹复合板力学试验研究
Author(s):
Lü Qingfang1, Yi Fan1, Liu Ye2
1School of Civil Engineering, Southeast University, Nanjing 211189, China
2College of Architecture and Environment, Sichuan University, Chengdu 610065, China
吕清芳1, 易凡1, 刘烨2
1东南大学土木工程学院, 南京 211189; 2四川大学建筑与环境学院, 成都 610065
Keywords:
carbon fiber-reinforced polymer;  bamboo scrimber;  uniaxial tension test;  pull-out test;  mechanical properties
CFRP;  重组竹;  单轴拉伸试验;  拉拔试验;  力学性能
PACS:
TU366.1
DOI:
10.3969/j.issn.1003-7985.2024.02.012
Abstract:
A novel composite plate made of carbon fiber-reinforced polymer(CFRP)grids and bamboo scrimber, termed CBCP, was developed to enhance the mechanical properties of bamboo scrimber and reduce its anisotropic defects. To investigate the mechanical behavior of CBCP and assess the influence of its composite fabrication method, uniaxial tensile tests were performed on eight sets of CBCP tensile specimens, and pull-out tests were conducted on eighteen groups of CBCP pull-out specimens. Three similar constitutive models were selected to depict the bond stress-slip curves of the pull-out specimens. The critical anchorage lengths between CFRP grids and bamboo scrimber were determined. The effects of the number of CFRP layers, characteristics of transverse CFRP bundles, and anchorage length on the bonding performance between CFRP grids and bamboo scrimber were analyzed. The results reveal that integrating a CFRP grid can increase the tensile strength of bamboo scrimber, both parallel and perpendicular to the grain, by 35.77% and 135.20%, respectively. This enhancement effectively reduces the anisotropic defects of bamboo scrimber. The increase of the number of grid layers and the grid spacing can enhance the tensile performance of CBCP. With the increase of the anchorage length, the average interface bonding strength decreases exponentially while the peak load slip decreases linearly.
为提高重组竹的力学性能并减轻其各向异性缺陷, 设计了一种新型CFRP网格-重组竹复合板(CBCP).分别对8组CBCP拉伸试样和18组CBCP拉拔试样进行单轴拉伸试验和拉拔试验, 以分析其力学行为并评估复合方法的影响.选择3个相似的构成模型对拉拔试样的黏结应力-滑移曲线进行拟合, 根据试验结果确定CFRP网格和重组竹的临界锚固长度及计算方法, 并分析讨论了CFRP 层数、横向CFRP束特性和锚固长度对CFRP网格与重组竹黏结性能的影响.结果表明, 复合CFRP网格可使重组竹的顺纹和横纹抗拉强度分别提高35.77%和135.20%, 从而改善了重组竹的各向异性缺陷.增加网格层数和间距可提高CBCP的拉伸性能.随着锚固长度的增加, 平均界面黏结强度呈幂函数递减, 而峰值载荷滑移则线性递减.

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Memo

Memo:
Biography: Lü Qingfang(1972—), female, doctor, professor, 101011003 @seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 52378222), Sichuan Science and Technology Program(No. 2023YFS0393).
Citation: Lü Qingfang, Yi Fan, Liu Ye.Mechanical experimental study of a new CFRP grid-bamboo scrimber composite plate[J].Journal of Southeast University(English Edition), 2024, 40(2):210-220.DOI:10.3969/j.issn.1003-7985.2024.02.012.
Last Update: 2024-06-20