A Self-Centering Buckling Restrained Braces for Curved Bridges
This project studies effective configurations of self-centering devices in the seismic retrofit of curved bridges for control of longitudinal and lateral forces. Reparability of bridge columns is investigated experimentally. A seismic retrofit and repair technique using a Carbon Fiber Reinforced Polymer (CFRP) donut and headed steel bars is implemented; a severely damaged cast-in-place column-to-cap beam joint and a column-to-footing joint are repaired using a CFRP donut, and their performance is compared to the original specimens. A fiber element model for the CFRP donut repair is developed. A numerical model of a seismically retrofitted curved bridge with Buckling Restrained Braces (BRBs) is developed. The steel core area and core length of BRBs is optimized to obtain maximum ductility of the retrofitted bridge under the design level earthquake. The optimized BRBs are placed in the bents of the bridge model and the seismic performance is evaluated through nonlinear dynamic analysis. The BRB retrofit is compared with a seismic retrofit using Self-Centering Energy Dissipation devices (SCEDs). Longitudinal BRBs/SCEDs are also implemented, which reduce the pounding forces between the deck and abutments. Guidelines are developed for the seismic retrofit of bridges using BRBs, SCEDs and CFRP donuts to enhance the seismic performance.
- Record URL:
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Supplemental Notes:
- This document was sponsored by the U.S. Department of Transportation, University Transportation Centers Program.
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Corporate Authors:
University of Utah, Salt Lake City
Department of Civil and Environmental Engineering
122 South Central Campus Drive, Suite 104
Salt Lake City, UT United States 84112 North Dakota State University
Fargo, ND United States 58108Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 -
Authors:
- Pantelides, Chris P
- Upadhyay, Anurag
- Wu, Ruoyang
- Publication Date: 2018-5
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: 77p
Subject/Index Terms
- TRT Terms: Braces; Bridge design; Columns; Curved bridges; Earthquake resistant design; Fiber reinforced polymers; Guidelines; Repairing; Retrofitting
- Subject Areas: Bridges and other structures; Design; Highways; Maintenance and Preservation;
Filing Info
- Accession Number: 01675630
- Record Type: Publication
- Report/Paper Numbers: MPC 18-348
- Files: UTC, TRIS, ATRI, USDOT
- Created Date: Jul 20 2018 3:47PM