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Author:

Zhang, Renbo (Zhang, Renbo.) | Li, Xinchen (Li, Xinchen.) | Jin, Liu (Jin, Liu.) (Scholars:金浏) | Du, Xiuli (Du, Xiuli.)

Indexed by:

EI Scopus SCIE

Abstract:

To solve the corrosion problems of steel bars in reinforced concrete (RC) structures and brittle damage in pure fiber-reinforced polymer (FRP) reinforced concrete structures, hybrid-reinforced concrete (hybrid-RC) structures combining FRP and steel bars have been proposed. The studies on hybrid-RC structures have focused on static loading conditions, while the structures may also be subjected to impact loading, leading to significant damage. Due to the difference in the properties of FRP and steel bars, FRP bars are always equivalent to steel bars based on different principles in calculation and design, e.g., equal-area, equal-strength, and equal-stiffness. In this work, to investigate the impact behavior of hybrid-RC beams and the influence of design principles, 17 specimens were designed and modeled using Basalt FRP (BFRP) bars replacing steel bars. The results show that the equalstrength-reinforced beams have the smallest damage extent, and the largest impact and reaction forces. While the equal-stiffness-reinforced beams have the greatest damage extent, the beams exhibited a better deformation and deformation recovery capacity. The impact resistance of equal-area-reinforced beams is between the remaining two. Besides, to fully utilize the material performance, for structures with high deformation and damage control requirements, it is recommended to use equal-strength-reinforced beams; for structures that need to reduce residual deflections, impact forces and reaction forces, equal-stiffness-reinforced beams are suggested; and if the economy of the materials is considered, equal-area-reinforced beams may be the preferred choice. The current study could be a reference for impact-resistant design for hybrid-RC structures.

Keyword:

Concrete beam Hybrid reinforcement Basalt fiber-reinforced polymer (BFRP) bars Impact response Equivalence design principle

Author Community:

  • [ 1 ] [Zhang, Renbo]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Xinchen]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 3 ] [Jin, Liu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China
  • [ 4 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China

Reprint Author's Address:

  • 金浏

    [Jin, Liu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing 100124, Peoples R China

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Source :

ENGINEERING STRUCTURES

ISSN: 0141-0296

Year: 2025

Volume: 333

5 . 5 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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