Strengthening of Existing Inverted-T Bent Caps: Design Recommendations and Examples
Inverted-T bent caps have been widely used in Texas to reduce the overall elevation of bridges, to improve the available clearance beneath the beams, and to improve aesthetics. Since bridge design criteria have been improved and modified over the decades, many of the early inverted-T bent caps are deficient when evaluated against the current design approach and/or lack adequate strength to support planned increases to live load demands. Therefore, techniques for strengthening these bent caps are needed. In this volume, the recommendations for identifying deficiencies of in-service bent caps are addressed along with the recommendations for selecting retrofit solutions to use. Based on the observations of the tests described in Volume 2, design procedures for six solutions are provided: end-region stiffener, clamped threadbar with channel, load-balancing post-tensioning, concrete infill with partial- and full-depth fiber reinforced polymer anchored by steel waling for the bent, and large bearing pad. Step-by-step procedures for each solution and design examples of each solution for the bent caps described are provided.
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Supplemental Notes:
- Project Title: Strengthening of Existing Inverted-T Bent Caps.
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Corporate Authors:
Texas A&M Transportation Institute, College Station
Texas A&M University System
3135 TAMU
College Station, TX United States 77843-3135Texas Department of Transportation
Research and Technology Implementation Office
125 E 11th Street
Austin, TX United States 78701-2483Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Authors:
- Hurlebaus, Stefan
- Mander, John B
- Birely, Anna C
- Terzioglu, Tevfik
- Cui, Jilong
- Park, Sun Hee
- Publication Date: 2018-11
Language
- English
Media Info
- Media Type: Digital/other
- Edition: Technical Report
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: 194p
Subject/Index Terms
- TRT Terms: Bents; Load and resistance factor design; Load transfer; Retrofitting; Structural strengthening
- Identifier Terms: AASHTO LRFD Bridge Design Specifications
- Uncontrolled Terms: Inverted T beam
- Geographic Terms: Texas
- Subject Areas: Bridges and other structures; Design; Highways; Maintenance and Preservation;
Filing Info
- Accession Number: 01687717
- Record Type: Publication
- Report/Paper Numbers: FHWA/TX-18/0-6893-P1, Report 0-6893-P1
- Contract Numbers: Project 0-6893
- Files: NTL, TRIS, ATRI, USDOT, STATEDOT
- Created Date: Dec 4 2018 8:30PM