Equivalent Lateral Force Design Method for Longitudinal Buckling-Restrained Braces in Bidirectional Ductile Diaphragms
Publication: Journal of Structural Engineering
Volume 150, Issue 3
Abstract
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.
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Data Availability Statement
Data generated during the study are available from the corresponding author by request.
Acknowledgments
This study was sponsored by the Transportation Research Board of the National Academies under the TRB-IDEA Program (NCHRP-215). The Fulbright program, SENESCYT Ecuador, and the University of Buffalo, are acknowledged for their financial support through a scholarship to Dr. Homero Carrion-Cabrera. However, any opinions, findings, conclusions, and recommendations presented are those of the authors and do not necessarily reflect the views of the sponsors.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 150 • Issue 3 • March 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jun 1, 2023
Accepted: Nov 1, 2023
Published online: Jan 4, 2024
Published in print: Mar 1, 2024
Discussion open until: Jun 4, 2024
ASCE Technical Topics:
- Bracing
- Bridge design
- Buckling
- Construction engineering
- Construction methods
- Continuum mechanics
- Design (by type)
- Diaphragms (structural)
- Ductility
- Dynamics (solid mechanics)
- Earthquake engineering
- Engineering fundamentals
- Engineering mechanics
- Forces (type)
- Geotechnical engineering
- Lateral forces
- Material mechanics
- Material properties
- Materials engineering
- Mechanical properties
- Seismic design
- Seismic tests
- Solid mechanics
- Structural dynamics
- Structural engineering
- Structural members
- Structural systems
- Tests (by type)
Authors
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Cited by
- Homero Carrion-Cabrera, Michel Bruneau, Asynchronous Shake-Table Testing of Seismic Resilient Multispan Bridges Having Buckling Restrained Braces in Bidirectional Ductile Diaphragm, Journal of Structural Engineering, 10.1061/JSENDH.STENG-12845, 150, 7, (2024).