Equivalent Lateral Force Design Method for Longitudinal Buckling-Restrained Braces in Bidirectional Ductile Diaphragms

Bridge design specifications include design provisions for ductile diaphragms to resist seismic excitations perpendicular to a bridge’s axis. Buckling restrained braces (BRBs) can conveniently be used for this purpose. Bidirectional ductile diaphragms expand the concept to resist all-direction seismic forces, and nonlinear inelastic response history analyses (NL-RHAs) can be used to show that satisfactory seismic performance objectives can be obtained using this concept. However, a simple design procedure is needed to address the design of the BRBs in the bridge longitudinal direction. As a first step, to fill that need for common multispan simply-supported bridges, a relatively simple-to-use equivalent lateral force (ELF) procedure has been developed on the basis of results from “optimal designs” obtained using NL-RHAs. Findings indicate that the proposed ELF design procedure leads to design that meet the target design objectives.

• Record URL:
  • https://doi.org/10.1061/JSENDH.STENG-12846
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Supplemental Notes:
  • © 2024 American Society of Civil Engineers.
• Authors:
  • Carrion-Cabrera, Homero
  • Bruneau, Michel
• Publication Date: 2024-3

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 04024003
• Serial:
  • Journal of Structural Engineering
  • Volume: 150
  • Issue Number: 3
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Braces; Bridge design; Buckling; Earthquake resistant design; Structural diaphragms
• Subject Areas: Bridges and other structures; Design; Highways;

Filing Info

• Accession Number: 01907544
• Record Type: Publication
• Files: TRIS, ASCE
• Created Date: Feb 7 2024 4:55PM