Prestressed MF-FRP: Experimental Study of Rapid Retrofit Solution for Deteriorated Prestressed C-Channel Beams

Brad C. McCoy, Zakariya Bourara, Gregory W. Lucier, Rudolf Seracino, Min Liu, Sheng Hsuan Lin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This paper presents design and installation details and full-scale test results for a prestressed mechanically fastened fiber-reinforced polymer (MF-FRP) retrofit solution that restores the original operating and inventory rating of prestressed concrete C-channel bridge superstructures with prestress losses due to concrete deterioration and steel corrosion. A retrofit solution that can be installed rapidly and immediately restores prestress losses is desired to minimize impacts on commerce, public transportation, and emergency services. Six 9.41-m (30-ft) long C-channel beams were tested for three-point bending to failure. The results of the experimental study indicate that the MF-FRP retrofit is capable of immediately restoring deteriorated C-channel beams with a 36% reduction in capacity from the original operating and inventory ratings. In this study, the reduction in the capacity of the C-channel beams was induced in the lab by cutting the bottom strand of each stem of the C-channel beam to simulate total prestress losses at the point of maximum internal moment. Further, the results of the experimental study indicate that the examined MF-FRP retrofit solution can be installed in 4.1 labor hours per retrofitted C-channel beam. Therefore, a four-worker DOT maintenance crew can install the retrofit on up to seven beams in a single eight-hour workday. A layered sectional analysis can be used to predict the flexural capacity of retrofitted C-channel beams with very good accuracy.

Original languageEnglish (US)
Article number0001536
JournalJournal of Performance of Constructed Facilities
Volume35
Issue number1
DOIs
StatePublished - Feb 1 2021
Externally publishedYes

Keywords

  • Fiber-reinforced polymer (FRP)
  • In-place concrete strength
  • Mechanically fastened
  • Prestressed concrete
  • Strengthening and repair

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Safety, Risk, Reliability and Quality

Fingerprint

Dive into the research topics of 'Prestressed MF-FRP: Experimental Study of Rapid Retrofit Solution for Deteriorated Prestressed C-Channel Beams'. Together they form a unique fingerprint.

Cite this