Bidiretional-Ductile End Diaphragms for Seismic Performance and Substructure Protection

This project will develop bi-directional ductile diaphragms for implementation in straight and skewed bridge superstructures to provide resistance to bidirectional earthquake excitations. Work in Stage 1 will involve non-linear time-history dynamic analyses to investigate the seismic performance of bridges with the proposed bi-directional ductile diaphragm concept, considering variations in skew, span length, reactive mass, fundamental period of vibration, and earthquake excitation characteristics. The dynamic analyses will allow investigating the impact of these parameters on global behavior as well as an understanding of the magnitude of local demands and the extent of bi-directional displacements that the hysteretic devices must be able to accommodate while delivering their ductile response. Work will also be conducted to identify effective and practical details for hysteretic energy dissipating devices. The outcome of this stage will be an understanding of expected dynamic seismic performance as a function of key design parameters, and details for the proposed energy dissipated elements to be investigated in Stage 2. Work in Stage 2 will involve scaled experiments to subject selected device and connection details to a regime of relative end-displacements representative of the results predicted from parametric analytical studies. Actual materials will be used and practical limits will be respected. The tests will be conducted in a quasi-static mode and the experiment will be designed based on the recommendations of the collaborating departments of transportation (DOTs). The outcome of this stage will be viable hysteretic devices and connections schemes, as well as a preliminarily designed prototype to provide an understanding of what would be entailed to conduct shake-table testing of a span constructed with the proposed ductile diaphragm concept. Collaborating DOTs will be solicited to contribute to shake-table testing. The final report will provide relevant data and recommended design requirements.

• Record URL:
  http://apps.trb.org/cmsfeed/TRBNetProjectDisplay.asp?ProjectID=3612

Language

• English

Project

• Status: Active
• Funding: $125000.00
• Contract Numbers:

  Project 20-30, IDEA

• Sponsor Organizations:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  American Association of State Highway & Transportation Officials (AASHTO)

  444 North Capitol Street, NW, Suite 225
  Washington, DC  United States  20001

  National Cooperative Highway Research Program (NCHRP) Innovations Deserving Exploratory Analysis (IDEA)

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Project Managers:

  Jawed, Inam

• Performing Organizations:

  State University of New York, Buffalo

  212 Ketter Hall
  Buffalo, NY  United States  14260
• Principal Investigators:

  Bruneau, Michel

• Start Date: 20141209
• Expected Completion Date: 0
• Actual Completion Date: 0
• Source Data: RiP Project 38188

Subject/Index Terms

• TRT Terms: Bridge design; Bridge superstructures; Diaphragms (Engineering); Dislocation (Geology); Earthquake resistant design; Geotechnical engineering; Seismicity; Vibration
• Subject Areas: Bridges and other structures; Design; Geotechnology; Highways;

Filing Info

• Accession Number: 01547495
• Record Type: Research project
• Source Agency: Transportation Research Board
• Contract Numbers: Project 20-30, IDEA
• Files: TRB, RIP
• Created Date: Dec 10 2014 1:02AM