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采用碳纤维增强聚合物复合材料对钢筋混凝土T梁进行抗弯加固。

Employing Carbon Fiber Reinforced Polymer Composites toward the Flexural Strengthening of Reinforced Concrete T-Beams.

作者信息

K Mallikarjuna, Ravindra P M, D P Archana, Daniyal Md, Asiri Abdullah Naser M, Khan Mohammad Amir, Islam Saiful

机构信息

Department of Civil Engineering, Bangalore Institute of Technology, Bengaluru 560004, India.

Department of Civil Engineering, Chandigarh Engineering College Jhanjeri, Mohali 140307, India.

出版信息

ACS Omega. 2023 May 17;8(21):18830-18838. doi: 10.1021/acsomega.3c00988. eCollection 2023 May 30.

DOI:10.1021/acsomega.3c00988
PMID:37273632
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10233840/
Abstract

Reinforced concrete structures are exposed to various loads under critical environmental conditions, which might lead to the deterioration of the structures prior to their designed service life. Hence, to improve the serviceability of the reinforced concrete (RC) structures and meet the design requirements, the structures are strengthened using carbon fiber reinforced polymer (CFRP) composites. The application of CFRP is done using two major techniques, namely externally bonded (EB) reinforcement and near surface mounted (NSM) techniques. The purpose of this study was to examine and compare the behavior of RC T-beams that had been flexurally reinforced utilizing EB and NSM techniques. Six full-size RC T-beams were evaluated, including a reference beam and four beams that had been flexurally reinforced using laminates made of EB and NSM CFRP. The findings of the experimental tests reveal that, when using the same quantity of CFRP, the beams strengthened with NSM laminates outperformed those strengthened with EB laminates in terms of ultimate load.

摘要

钢筋混凝土结构在恶劣的环境条件下承受各种荷载，这可能导致结构在设计使用寿命之前就出现劣化。因此，为了提高钢筋混凝土（RC）结构的适用性并满足设计要求，采用碳纤维增强聚合物（CFRP）复合材料对结构进行加固。CFRP的应用主要采用两种技术，即外部粘贴（EB）加固和近表面安装（NSM）技术。本研究的目的是检验和比较采用EB和NSM技术进行抗弯加固的RC T梁的性能。评估了六根全尺寸RC T梁，包括一根参考梁和四根采用EB和NSM CFRP制成的层压板进行抗弯加固的梁。试验测试结果表明，在使用相同数量CFRP的情况下，采用NSM层压板加固的梁在极限荷载方面优于采用EB层压板加固的梁。

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