Decompression Events during Transverse Seismic Response of Symmetric Three-Pier Bridges with Distributed Mass
Publication: Journal of Structural Engineering
Volume 144, Issue 9
Abstract
An analytical solution is presented for the transverse seismic response of elastic symmetric bridges with deck restrained or transversely free at the abutments and rigidly connected with three piers that are elastically supported on the soil. The deck has distributed mass and mass moment of inertia. Flexure in the piers is coupled with deck torsion. The characteristic equation, symmetric transverse normal modes, modal participation factors, and participating masses are given analytically in terms of the dimensionless parameters defining the bridge layout and properties. Modal response spectrum analysis gives charts for the transverse seismic action that causes a footing to uplift from the ground, or the deck from a bearing at the abutment or at a pier top. Graphs are also given for decompression of post-tensioned decks, laterally restrained at the ends.
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Acknowledgments
The research leading to these results received funding from the Hellenic General Secretariat for Research & Technology under grant ERC-12 of the Operational Program “Education and lifelong learning,” co-funded by the European Union (European Social Fund) and national resources. The MEEES Erasmus Mundus M.Sc. program supported the second author.
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Information
Published In
Journal of Structural Engineering
Volume 144 • Issue 9 • September 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jul 7, 2017
Accepted: Mar 4, 2018
Published online: Jun 23, 2018
Published in print: Sep 1, 2018
Discussion open until: Nov 23, 2018
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