Computers and Concrete

  • 제33권4호
  • /
  • Pages.361-372
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  • 2024
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

System-level performance of earthquake-damaged concrete bridges with repaired columns

  • Giacomo Fraioli (Department of Civil, Architectural and Environmental Engineering, Missouri University of Science and Technology) ;
  • Yu Tang (College of Civil Engineering, Nanjing Forestry University) ;
  • Yang Yang (Department of Civil, Environmental and Biomedical Engineering, University of Hartford) ;
  • Lesley H. Sneed (Department of Civil, Materials and Environmental Engineering, University of Illinois Chicago)
  • 투고 : 2023.11.05
  • 심사 : 2024.01.14
  • 발행 : 2024.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Reinforced concrete (RC) bridge columns are typically designated as the primary source of energy dissipation for a bridge structure during an earthquake. Therefore, seismic repair of RC bridge columns has been studied extensively during the past several decades. On the other hand, few studies have been conducted to evaluate how repaired column members influence the system-level response of an RC bridge structure in subsequent earthquakes. In this study, a numerical model was established to simulate the response of two large-scale RC columns, repaired using different techniques, reported in the literature. The columns were implemented into a prototype bridge model that was subjected to earthquake loading. Incremental dynamic analysis (IDA) and fragility analysis were conducted on numerical bridge models to evaluate the efficacy of the repairs and the post-repair seismic performance of the prototype bridge that included one or more repaired columns in various locations. For the prototype bridge herein modeled, the results showed that a confinement-enhanced oriented repair would not affect the seismic behavior of the prototype bridge. Increasing the strength of the longitudinal reinforcement could effectively reduce the drift of the prototype bridge in subsequent earthquakes. A full repair configuration for the columns was the most effective method for enhancing the seismic performance of the prototype bridge. To obtain a positive effect on seismic performance, a minimum of two repaired columns was required.

키워드

과제정보

This study was supported by the Mid-America Transportation Center under a project grant no. 00065573. The Center is sponsored by the U.S. Department of Transportation under grant no. 69A3551747107.

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