Reinforced Concrete Bridge Deck Repair with Titanium NSM

S. L. Platt, K. A. Harries, M. J. McCabe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Abstract

The use of titanium bars as a near surface mounted (NSM) repair method for highway bridge deck slabs is investigated in this pilot study. Four full-scale slabs had half of their internal reinforcing steel cut resulting in an approximately 40% loss of slab capacity; these represented ‘damaged’ slabs. The objective of this study was to evaluate the performance of replacing these two cut bars in order to restore the original capacity of the slab. The four slabs were repaired using NSM titanium bars designed to restore either their capacity or stiffness of the cut bars. One slab from each group was repaired using a full-length straight bar while the other implemented a ‘staple’ type repair. Both approaches effectively restored the capacity of the slabs although each had significant impacts on the available ductility of the repaired slab. Repairs based on restoring lost bar strength resulted in preferable behavior. Restoring lost stiffness required four times as much titanium and resulted in over-reinforced sections showing little ductility.

Original languageEnglish
Title of host publicationICSBE 2018
EditorsR. Dissanayake, P. Mendis
PublisherSpringer Nature
Pages447-457
Number of pages11
DOIs
Publication statusE-pub ahead of print - 7 Aug 2019

Publication series

NameLecture Notes in Civil Engineering
Volume44
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Keywords

  • Bond
  • Concrete
  • Corrosion
  • Retrofit
  • Serviceability
  • Ti6al-4V

ASJC Scopus subject areas

  • Civil and Structural Engineering

Cite this

Platt, S. L., Harries, K. A., & McCabe, M. J. (2019). Reinforced Concrete Bridge Deck Repair with Titanium NSM. In R. Dissanayake, & P. Mendis (Eds.), ICSBE 2018 (pp. 447-457). (Lecture Notes in Civil Engineering; Vol. 44). Springer Nature. https://doi.org/10.1007/978-981-13-9749-3_39