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Author:

Yuan, Wan-Ying (Yuan, Wan-Ying.) | Han, Qiang (Han, Qiang.) | Bai, Yu-Lei (Bai, Yu-Lei.) | Du, Xiu-Li (Du, Xiu-Li.) | Liu, Qing-Long (Liu, Qing-Long.)

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EI Scopus

Abstract:

The purpose of this study was to achieve a comprehensive understanding of the compressive behavior of FRP-confined concrete cylinders and the applicability of existing confinement models. A total of 1 049 groups of experimental results of conventional fiber-reinforced polymer (FRP) or large rupture strain (LRS) FRP-wrapped normal concrete, high-strength concrete, ultrahigh-performance concrete, recycled aggregate concrete, seawater sea-sand concrete, and engineered cementitious composite with unconfined concrete strength in the range of 6.2-188.2 MPa were assembled. Based on data analysis, a prediction equation for the FRP hoop rupture strain reduction coefficient with higher accuracy was formulated using the least-squares method. The effects of the FRP type and the concrete strength and type on the peak strength and ultimate strain were studied. The results show that at a given actual confinement ratio, the FRP type has a negligible effect on the peak strength but has a significant effect on the ultimate strain. LRS FRP can significantly improve the ductility of confined cylinders, which is more suitable for the seismic reinforcement of bridge piers. The increase in concrete strength reduces the confinement effectiveness of the FRP, resulting in a relatively small enhancement ratio of the peak strength and ultimate strain. Compared with other types of concrete with the same compresive strength, the confined high ductile engineered cementitious composite has a lower strength enhancement. Finally, the prediction effect on the peak strength and ultimate strain of the existing confinement models was evaluated using the average absolute error (AAE), mean (M), and standard deviation (SD). A unified confinement model considering the FRP type and the concrete strength and type is proposed. The AAE values of peak strength and ultimate strain predictions obtained by the proposed model are 0.13 and 0.31, respectively. This model can serve as a simplified formula to estimate the peak strength and ultimate strain of various types of concrete confined with FRP. © 2022, Editorial Department of China Journal of Highway and Transport. All right reserved.

Keyword:

Forecasting Bridges Compressive strength Cylinders (shapes) Fiber reinforced plastics Reinforced concrete High performance concrete Concrete aggregates

Author Community:

  • [ 1 ] [Yuan, Wan-Ying]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Han, Qiang]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Bai, Yu-Lei]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Du, Xiu-Li]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Liu, Qing-Long]Key Laboratory of Urban Security and Disaster Engineering, Beijing University of Technology, Beijing; 100124, China

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Source :

China Journal of Highway and Transport

ISSN: 1001-7372

Year: 2022

Issue: 2

Volume: 35

Page: 146-158

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 12

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