Seismic Rehabilitation of Skewed and Curved Bridges Using a New Generation of Bulking Restrained Braces

Buckling restrained braces (BRBs) can be used as structural fuses by dissipating the seismic input energy to a structure while the main structural components remain undamaged. In the case of a bridge, this implies that in an earthquake the BRBs act as dampers and could be damaged; however, the building structural components should be protected to a large degree. BRBs have been used in buildings in Japan since the 1995 Kobe earthquake (Reina and Normile, 1997) and in the United States (US) after the Northridge earthquake (Clark et al., 1999). Almost all applications have been limited to buildings, either as components of new buildings. Recently, researchers proposed implementing BRBs as structural fuses in steel bridges. Kanaji et al. (2003) used BRBs for retrofit of a truss bridge (Minato Bridge) which is one of the longest bridges in the world. El-Bahey and Bruneau (2010, 2011) introduced the concept of using BRBs for making ductile end diaphragms or bracing bridge bents in concrete slab on steel girder bridges. This concept has been experimentally verified using specially designed ductile end diaphragms. Cardeni et al. (2004) conducted shake table tests on a 2/5 scale slab-on-girder bridge which had short length BRBs at its end diaphragm. In all previous research BRBs were used in the transverse direction in order to retrofit bridges against seismic excitations; however, Celik and Bruneau (2009) introduced the idea of using BRBs in two directions in steel bridges.

Language

  • English

Project

  • Status: Completed
  • Funding: $339745
  • Contract Numbers:

    DTRT12-G-UTC08

  • Sponsor Organizations:

    Research and Innovative Technology Administration

    University Transportation Centers Program
    1200 New Jersey Avenue
    Washington, DC  United States  20590
  • Project Managers:

    Kline, Robin

  • Performing Organizations:

    University of Utah, Salt Lake City

    College of Engineering, Department of Civil Engineering
    Salt Lake City, UT  United States  84112-0561
  • Principal Investigators:

    Ibarra, Luis

    Pantelides, Chris

  • Start Date: 20130101
  • Expected Completion Date: 0
  • Actual Completion Date: 20170117
  • Source Data: MPC-421

Subject/Index Terms

Filing Info

  • Accession Number: 01489496
  • Record Type: Research project
  • Source Agency: Mountain-Plains Consortium
  • Contract Numbers: DTRT12-G-UTC08
  • Files: UTC, RiP
  • Created Date: Aug 9 2013 1:01AM