Section Properties for Latticed Members of San Francisco–Oakland Bay Bridge
Publication: Journal of Bridge Engineering
Volume 5, Issue 2
Abstract
This paper focuses on the determination of section properties of latticed members for seismic retrofit of the San Francisco–Oakland Bay Bridge. To consider actual section integrity for a latticed member, the concept of reduction factors βm for moment of inertia and βt for torsional constant is introduced to account for the shear flow transferring capacity of lacing bars or battens and their connections. A set of formulas is proposed for calculating section properties required for seismic analysis and capacity determination. The validity of the proposed section properties is confirmed by a finite-element analysis of a latticed member. It is found that the proposed simple procedure closely resembles the finite-element analysis results. The proposed method is also supported by the recent 1/2 scale model test of the SFOBB laced member at UNR.
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Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 5 • Issue 2 • May 2000
Pages: 156 - 164
History
Received: Apr 21, 1997
Published online: May 1, 2000
Published in print: May 2000
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