Shear strengthening of a PC bridge girder with NSM CFRP rectangular bars

Antonio Nanni, Marco Di Ludovico, Renato Parretti

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

Bridges worldwide are falling into a state of disrepair caused by deterioration, traffic overloading, and poor maintenance. It is estimated that over 100,000 of the half million existing bridges in the US are in need of repair or replacement. Although the full replacement option could be viable, it is an expensive solution with significant disruption of service. This paper focuses on the use of carbon fiber reinforced polymer (CFRP) rectangular bars installed as near surface mounted (NSM) reinforcement for shear strengthening in conjunction with an externally bonded pre-cured CFRP laminate to increase the flexural capacity of a prestressed concrete (PC) bridge girder. The specimen, which was removed from an overloaded bridge in Kansas was strengthened and tested in the laboratory. Test results showed that the proposed NSM reinforcement technique represents an effective solution to increase shear capacity.

Original languageEnglish
Pages (from-to)297-309
Number of pages13
JournalAdvances in Structural Engineering
Volume7
Issue number4
DOIs
StatePublished - Aug 1 2004
Externally publishedYes

Fingerprint

Concrete bridges
Prestressed concrete
Carbon fibers
Reinforcement
Polymers
Laminates
Deterioration
Repair

Keywords

  • Bridges
  • Fiber reinforced polymer
  • Flexural strengthening
  • Prestressed concrete
  • Shear strengthening.
  • Structural repair

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Shear strengthening of a PC bridge girder with NSM CFRP rectangular bars. / Nanni, Antonio; Di Ludovico, Marco; Parretti, Renato.

In: Advances in Structural Engineering, Vol. 7, No. 4, 01.08.2004, p. 297-309.

Research output: Contribution to journalArticle

Nanni, Antonio ; Di Ludovico, Marco ; Parretti, Renato. / Shear strengthening of a PC bridge girder with NSM CFRP rectangular bars. In: Advances in Structural Engineering. 2004 ; Vol. 7, No. 4. pp. 297-309.
@article{942a657f32614e3995494b72b5ac35bc,
title = "Shear strengthening of a PC bridge girder with NSM CFRP rectangular bars",
abstract = "Bridges worldwide are falling into a state of disrepair caused by deterioration, traffic overloading, and poor maintenance. It is estimated that over 100,000 of the half million existing bridges in the US are in need of repair or replacement. Although the full replacement option could be viable, it is an expensive solution with significant disruption of service. This paper focuses on the use of carbon fiber reinforced polymer (CFRP) rectangular bars installed as near surface mounted (NSM) reinforcement for shear strengthening in conjunction with an externally bonded pre-cured CFRP laminate to increase the flexural capacity of a prestressed concrete (PC) bridge girder. The specimen, which was removed from an overloaded bridge in Kansas was strengthened and tested in the laboratory. Test results showed that the proposed NSM reinforcement technique represents an effective solution to increase shear capacity.",
keywords = "Bridges, Fiber reinforced polymer, Flexural strengthening, Prestressed concrete, Shear strengthening., Structural repair",
author = "Antonio Nanni and {Di Ludovico}, Marco and Renato Parretti",
year = "2004",
month = "8",
day = "1",
doi = "10.1260/1369433041653570",
language = "English",
volume = "7",
pages = "297--309",
journal = "Advances in Structural Engineering",
issn = "1369-4332",
publisher = "Multi-Science Publishing Co. Ltd",
number = "4",

}

TY - JOUR

T1 - Shear strengthening of a PC bridge girder with NSM CFRP rectangular bars

AU - Nanni, Antonio

AU - Di Ludovico, Marco

AU - Parretti, Renato

PY - 2004/8/1

Y1 - 2004/8/1

N2 - Bridges worldwide are falling into a state of disrepair caused by deterioration, traffic overloading, and poor maintenance. It is estimated that over 100,000 of the half million existing bridges in the US are in need of repair or replacement. Although the full replacement option could be viable, it is an expensive solution with significant disruption of service. This paper focuses on the use of carbon fiber reinforced polymer (CFRP) rectangular bars installed as near surface mounted (NSM) reinforcement for shear strengthening in conjunction with an externally bonded pre-cured CFRP laminate to increase the flexural capacity of a prestressed concrete (PC) bridge girder. The specimen, which was removed from an overloaded bridge in Kansas was strengthened and tested in the laboratory. Test results showed that the proposed NSM reinforcement technique represents an effective solution to increase shear capacity.

AB - Bridges worldwide are falling into a state of disrepair caused by deterioration, traffic overloading, and poor maintenance. It is estimated that over 100,000 of the half million existing bridges in the US are in need of repair or replacement. Although the full replacement option could be viable, it is an expensive solution with significant disruption of service. This paper focuses on the use of carbon fiber reinforced polymer (CFRP) rectangular bars installed as near surface mounted (NSM) reinforcement for shear strengthening in conjunction with an externally bonded pre-cured CFRP laminate to increase the flexural capacity of a prestressed concrete (PC) bridge girder. The specimen, which was removed from an overloaded bridge in Kansas was strengthened and tested in the laboratory. Test results showed that the proposed NSM reinforcement technique represents an effective solution to increase shear capacity.

KW - Bridges

KW - Fiber reinforced polymer

KW - Flexural strengthening

KW - Prestressed concrete

KW - Shear strengthening.

KW - Structural repair

UR - http://www.scopus.com/inward/record.url?scp=4344610346&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4344610346&partnerID=8YFLogxK

U2 - 10.1260/1369433041653570

DO - 10.1260/1369433041653570

M3 - Article

AN - SCOPUS:4344610346

VL - 7

SP - 297

EP - 309

JO - Advances in Structural Engineering

JF - Advances in Structural Engineering

SN - 1369-4332

IS - 4

ER -