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Technical Papers
Feb 14, 2022

Experimental and Analytical Investigation of a 64-Year-Old Prestressed Beam Retrofitted with External Posttensioning

Publication: Journal of Bridge Engineering
Volume 27, Issue 4

Abstract

This paper presents an experimental investigation of a 64-year-old, full-scale, simply supported, prestressed bridge girder retrofitted with external posttensioning. The specific retrofit can be used to increase the flexural strength of corrosion-damaged prestressed beams. The test specimen, taken from a bridge located in Virginia, was subjected to monotonically increasing loads until the occurrence of a diagonal compression failure in the vicinity of one of the external tendon anchor blocks. The experimental test was accompanied by finite-element analyses, aimed to elucidate the failure mode and quantify the impact of the repair on the capacity of damaged beams. Simplified calculations based on strut-and-tie models and design code guidelines are found to give satisfactory estimates of the failure load, while also describing the principal aspects of the force transfer between the external tendons and the beam and the stress state in the immediate vicinity of the anchor blocks.

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Acknowledgments

The work presented in this paper was supported by the Virginia Transportation Research Council (VTRC). The opinions provided herein are solely those of the authors and do not necessarily represent the opinions of the VTRC. The authors recognize the technical support of the VTRC, the Hampton Roads District of VDOT, Structural Technologies, and the technicians and students working in the Thomas M. Murray Structural Engineering Laboratory at Virginia Tech.

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Published In

Go to Journal of Bridge Engineering
Journal of Bridge Engineering
Volume 27Issue 4April 2022

History

Received: Feb 10, 2021
Accepted: Jan 2, 2022
Published online: Feb 14, 2022
Published in print: Apr 1, 2022
Discussion open until: Jul 14, 2022

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Authors

Affiliations

Lena Leicht [email protected]
Graduate Student, Institute of Concrete Structures, TU Dresden, Dresden 01062, Germany (corresponding author). Email: [email protected]
Professor, Charles E. Via Jr. Dept. of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA 24060. ORCID: https://orcid.org/0000-0002-2885-5524. Email: [email protected]
Ioannis Koutromanos, M.ASCE [email protected]
Associate Professor, Charles E. Via Jr. Dept. of Civil & Environmental Engineering, Virginia Tech, Blacksburg, VA 24060. Email: [email protected]
Matthew H. Hebdon, M.ASCE [email protected]
Associate Professor, Dept. of Civil, Architectural and Environmental Engineering, Univ. of Texas at Austin, Austin, TX 78660. Email: [email protected]
Oliver Mosig [email protected]
Graduate Student, Institute of Concrete Structures, TU Dresden, Dresden 01062, Germany. Email: [email protected]

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  • Decision Analysis of a Reinforcement Scheme for In-Service Prestressed Concrete Box Girder Bridges Based on AHP and Evaluation of the Reinforcement Effect, Buildings, 10.3390/buildings12101771, 12, 10, (1771), (2022).

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