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Author:

Li, Ping (Li, Ping.) | Jin, Liu (Jin, Liu.) (Scholars:金浏) | Chen, Wensu (Chen, Wensu.) | Hao, Hong (Hao, Hong.) | Du, Xiuli (Du, Xiuli.)

Indexed by:

EI Scopus SCIE

Abstract:

This paper presents a numerical study on the plastic hinge behavior and rotation capacity of concrete columns reinforced with a combination of steel bars and fiber-reinforced polymer (FRP) bars. A meso-scale numerical model, which considers the internal heterogeneity of concrete and bond behavior between concrete and longitudinal reinforcements, was developed and validated. The failure modes, lateral load-displacement responses, and the physical plastic hinge lengths of hybrid steel-FRP reinforced concrete (SFRC) columns were investigated and compared with those of conventional steel-reinforced concrete columns. The results indicated that the steel yielding zone and curvature localization zone of SFRC columns with FRP longitudinal bars were enlarged, due to the relatively low modulus of FRP bars. After that, a parametric analysis was performed to study the plastic hinge length of SFRC columns with respect to the nominal area ratio of FRP longitudinal bars, shear span-to-depth ratio, axial load ratio, and longitudinal reinforcement ratio. A new empirical model was proposed to predict the equivalent plastic hinge length, which was subsequently integrated into an analytical method for predicting the ultimate rotation. The comparison of predictions with simulation and test results demonstrated the accuracy of both the proposed empirical model and analytical method.

Keyword:

Plastic hinge length Meso-scale modeling Rotation capacity RC column Hybrid reinforcement

Author Community:

  • [ 1 ] [Li, Ping]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 2 ] [Jin, Liu]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 3 ] [Du, Xiuli]Beijing Univ Technol, Key Lab Urban Secur & Disaster Engn, Minist Educ, Beijing, Peoples R China
  • [ 4 ] [Li, Ping]Curtin Univ, Ctr Infrastructural Monitoring & Protect, Sch Civil & Mech Engn, Perth, WA 6102, Australia
  • [ 5 ] [Chen, Wensu]Curtin Univ, Ctr Infrastructural Monitoring & Protect, Sch Civil & Mech Engn, Perth, WA 6102, Australia
  • [ 6 ] [Hao, Hong]Curtin Univ, Ctr Infrastructural Monitoring & Protect, Sch Civil & Mech Engn, Perth, WA 6102, Australia
  • [ 7 ] [Hao, Hong]Guangzhou Univ, Earthquake Engn Res & Test Ctr, Guangzhou, Peoples R China

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Source :

ENGINEERING STRUCTURES

ISSN: 0141-0296

Year: 2024

Volume: 322

5 . 5 0 0

JCR@2022

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 1

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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