Reinforced Concrete Bridge Deck Repair with Titanium NSM

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

doi:10.1007/978-981-13-9749-3_39

Reinforced Concrete Bridge Deck Repair with Titanium NSM

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

Department of Architecture & Civil Engineering

Research output: Chapter or section in a book/report/conference proceeding › Chapter in a published conference proceeding

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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 language	English
Title of host publication	ICSBE 2018
Editors	R. Dissanayake, P. Mendis
Publisher	Springer Nature
Pages	447-457
Number of pages	11
DOIs	https://doi.org/10.1007/978-981-13-9749-3_39
Publication status	E-pub ahead of print - 7 Aug 2019

Publication series

Name	Lecture Notes in Civil Engineering
Volume	44
ISSN (Print)	2366-2557
ISSN (Electronic)	2366-2565

Funding

Acknowledgement. The research presented was sponsored by the Perryman Company. The findings and conclusions reported in this paper reflect the opinion of the authors and are not necessarily those of the Perryman Co. Slab construction and testing Slab A was sponsored by the Pennsylvania Department of Transportation. All testing was conducted in the Watkins Haggart Structural Engineering Laboratory at the University of Pittsburgh. The second author acknowledges the support of the Leverhulme Trust (UK).

Keywords

Bond
Concrete
Corrosion
Retrofit
Serviceability
Ti6al-4V

ASJC Scopus subject areas

Civil and Structural Engineering

Access to Document

10.1007/978-981-13-9749-3_39

REINFORCED CONCRETE BRIDGE DECK REPAIR WITH TITANIUM NSM.PDF
This is a post-peer-review, pre-copyedit version of a chapter published in ICSBE 2018. Lecture Notes in Civil Engineering, vol. 44, Springer, Singapore. The final authenticated version is available online at: https://doi.org/10.1007/978-981-13-9749-3_39
Accepted author manuscript, 785 KB

Cite this

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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 {\textquoteleft}damaged{\textquoteright} 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 {\textquoteleft}staple{\textquoteright} 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.",

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Reinforced Concrete Bridge Deck Repair with Titanium NSM

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Keywords

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