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通过粘结制造的碳网格数量评估单向板的弯曲性能。

Evaluation of the Flexural Behavior of One-Way Slabs by the Amount of Carbon Grid Manufactured by Adhesive Bonding.

作者信息

Kim Kyung-Min, Park Sung-Woo, Song Bhum-Keun, Yoon Seon-Hee

机构信息

Seismic Safety Center, Korea Conformity Laboratories (KCL), Suwon 16229, Republic of Korea.

Korea Carbon Industry Promotion Agency, Jeonju 54853, Republic of Korea.

出版信息

Polymers (Basel). 2024 Sep 24;16(19):2690. doi: 10.3390/polym16192690.

DOI:10.3390/polym16192690
PMID:39408401
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11479221/
Abstract

Fiber-reinforced polymers (FRPs), which are resistant to corrosion, are used as reinforcement material for concrete. However, the flexural behavior of concrete members reinforced with FRPs can vary depending on the properties of FRPs. In this study, the flexural behavior of one-way concrete slab specimens reinforced with a new grid-type carbon-fiber-reinforced polymer (CFRP) (carbon grid) manufactured by bonding pultruded CFRP strands to an adhesive was investigated. The experimental results indicated differences in the load-deflection relationships of the specimens depending on the carbon grid reinforcement amount. Specimens in which the carbon grids were over-reinforced or reinforced close to the balanced reinforcement ratio reached the maximum load due to concrete crushing and exhibited ductile failure. The specimen under-reinforced with the carbon grid exhibited brittle failure. Specimens with carbon grid reinforcement close to a balanced reinforcement ratio exhibited maximum loads ranging from 0.43 to 0.61 times the calculated flexural strength, which resulted in becoming 0.86-1.00 lower in the specimens with a wider width of the CFRP strands. This study proposes coefficients to estimate the stiffness of carbon-grid-reinforced concrete flexural members after cracking. Applying these coefficients resulted in stiffness calculations that reasonably simulated the behavior of the specimens reinforced with carbon grids after crack formation.

摘要

纤维增强聚合物（FRP）耐腐蚀，用作混凝土的增强材料。然而，用FRP增强的混凝土构件的抗弯性能会因FRP的性能而异。在本研究中，对一种通过将拉挤碳纤维增强聚合物（CFRP）股线粘结到粘合剂上制成的新型网格型碳纤维增强聚合物（CFRP）（碳网格）增强的单向混凝土板试件的抗弯性能进行了研究。试验结果表明，根据碳网格增强量的不同，试件的荷载-挠度关系存在差异。碳网格过度增强或增强接近平衡配筋率的试件由于混凝土压碎而达到最大荷载，并表现出延性破坏。碳网格配筋不足的试件表现出脆性破坏。碳网格增强接近平衡配筋率的试件的最大荷载范围为计算抗弯强度的0.43至0.61倍，这导致CFRP股线宽度较宽的试件的最大荷载降低0.86 - 1.00倍。本研究提出了估算碳网格增强混凝土抗弯构件开裂后刚度的系数。应用这些系数进行的刚度计算合理地模拟了碳网格增强试件在开裂后的性能。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/22ce87981926/polymers-16-02690-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/45033780ddc2/polymers-16-02690-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/aa14a695951d/polymers-16-02690-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/9f6e91f4b712/polymers-16-02690-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/7e0c59a43b54/polymers-16-02690-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/5756b1dc961c/polymers-16-02690-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/6ff6fb5933c5/polymers-16-02690-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/c0aae8223181/polymers-16-02690-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/05d6ca6fca72/polymers-16-02690-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/3805c04a0f64/polymers-16-02690-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/4ed5212bbf5d/polymers-16-02690-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/d5ae40289335/polymers-16-02690-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/e3a670fcc334/polymers-16-02690-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/a0cdfc3b524a/polymers-16-02690-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/22ce87981926/polymers-16-02690-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/45033780ddc2/polymers-16-02690-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/aa14a695951d/polymers-16-02690-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/9f6e91f4b712/polymers-16-02690-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/7e0c59a43b54/polymers-16-02690-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/5756b1dc961c/polymers-16-02690-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/6ff6fb5933c5/polymers-16-02690-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/c0aae8223181/polymers-16-02690-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/05d6ca6fca72/polymers-16-02690-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/3805c04a0f64/polymers-16-02690-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/4ed5212bbf5d/polymers-16-02690-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/d5ae40289335/polymers-16-02690-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/e3a670fcc334/polymers-16-02690-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/a0cdfc3b524a/polymers-16-02690-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3552/11479221/22ce87981926/polymers-16-02690-g014.jpg

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Polymers (Basel). 2022 Nov 28;14(23):5185. doi: 10.3390/polym14235185.
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Experimental Study of Fatigue and Fracture Behavior of Carbon Fiber-Reinforced Polymer (CFRP) Straps.碳纤维增强聚合物（CFRP）带材疲劳与断裂行为的实验研究
Polymers (Basel). 2022 May 23;14(10):2129. doi: 10.3390/polym14102129.