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预应力纤维增强聚合物筋的传递长度与滑移

Transfer Length vs. Slip of Prestressed Fiber-Reinforced Polymer Reinforcement.

作者信息

Jokūbaitis Aidas, Valivonis Juozas

机构信息

Department of Reinforced Concrete Structures and Geotechnics, Faculty of Civil Engineering, Vilnius Gediminas Technical University, Sauletekio Av. 11, LT-10223 Vilnius, Lithuania.

出版信息

Polymers (Basel). 2023 Feb 27;15(5):1190. doi: 10.3390/polym15051190.

DOI:10.3390/polym15051190
PMID:36904430
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10007038/
Abstract

A comprehensive analysis of the relationship between transfer length and slip of different types of prestressed fiber reinforced polymer (FRP) reinforcement is provided. The results of the transfer length and slip together with the main influencing parameters of approximately 170 specimens prestressed with different FRP reinforcement were collected. After the analysis of a larger database of transfer length versus slip, new bond shape factors were proposed for carbon fiber composite cable (CFCC) strands (α = 3.5) and carbon fiber reinforced polymer (CFRP) bars (α = 2.5). It was also determined that the type of prestressed reinforcement has an influence on the transfer length of the aramid fiber reinforced polymer (AFRP) bars. Therefore, α = 4.0 and α = 2.1 were proposed for AFRP Arapree bars and AFRP FiBRA and Technora bars, respectively. Moreover, the main theoretical models are discussed together with the comparison of theoretical and experimental transfer length results based on the slip of reinforcement. Additionally, the analysis of the relationship between transfer length and slip and the proposed new values of the bond shape factor α have the potential to be introduced in the production and quality control processes of precast prestressed concrete members and to stimulate additional research that increases the understanding of the transfer length of FRP reinforcement.

摘要

本文对不同类型的预应力纤维增强聚合物（FRP）筋的传递长度与滑移之间的关系进行了全面分析。收集了约170个采用不同FRP筋进行预应力处理的试件的传递长度和滑移结果以及主要影响参数。在对传递长度与滑移的更大数据库进行分析之后，针对碳纤维复合缆索（CFCC）钢绞线（α = 3.5）和碳纤维增强聚合物（CFRP）筋（α = 2.5）提出了新的粘结形状系数。研究还确定了预应力筋的类型对芳纶纤维增强聚合物（AFRP）筋的传递长度有影响。因此，分别针对AFRP Arapree筋和AFRP FiBRA及Technora筋提出α = 4.0和α = 2.1。此外，还讨论了主要理论模型，并基于筋的滑移对理论和试验传递长度结果进行了比较。另外，传递长度与滑移之间的关系分析以及所提出的粘结形状系数α的新值，有可能被引入预制预应力混凝土构件的生产和质量控制过程中，并激发更多有助于加深对FRP筋传递长度理解的研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/e637c5883b62/polymers-15-01190-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/f8129265dba2/polymers-15-01190-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/7ed3cef791c9/polymers-15-01190-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/fecdabb5652c/polymers-15-01190-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/87266d516dec/polymers-15-01190-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/25a5363ea6d0/polymers-15-01190-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/3063dd58171b/polymers-15-01190-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/c882cf295539/polymers-15-01190-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/6b42a5695930/polymers-15-01190-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/c66fbc5e7425/polymers-15-01190-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/4cf4af9c039b/polymers-15-01190-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/e637c5883b62/polymers-15-01190-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/f8129265dba2/polymers-15-01190-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/7ed3cef791c9/polymers-15-01190-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/fecdabb5652c/polymers-15-01190-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/87266d516dec/polymers-15-01190-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/25a5363ea6d0/polymers-15-01190-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/3063dd58171b/polymers-15-01190-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/c882cf295539/polymers-15-01190-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/6b42a5695930/polymers-15-01190-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/c66fbc5e7425/polymers-15-01190-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/4cf4af9c039b/polymers-15-01190-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a602/10007038/e637c5883b62/polymers-15-01190-g011.jpg

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本文引用的文献

1
An Analysis of the Transfer Lengths of Different Types of Prestressed Fiber-Reinforced Polymer Reinforcement.不同类型预应力纤维增强聚合物增强材料的传递长度分析
Polymers (Basel). 2022 Sep 20;14(19):3931. doi: 10.3390/polym14193931.
2
Bond Behavior of FRP Bars in Lightweight SCC under Direct Pull-Out Conditions: Experimental and Numerical Investigation.直接拔出条件下纤维增强塑料（FRP）筋在轻骨料自密实混凝土（SCC）中的粘结性能：试验与数值研究
Materials (Basel). 2022 May 16;15(10):3555. doi: 10.3390/ma15103555.
3
Experimental Research on the Behavior of the Rail Seat Section of Different Types of Prestressed Concrete Sleepers.
不同类型预应力混凝土轨枕轨座截面性能的试验研究
Materials (Basel). 2020 May 26;13(11):2432. doi: 10.3390/ma13112432.