Design, Construction, and Shake Table Testing of a Steel Girder Bridge System with ABC Connections
Publication: Journal of Bridge Engineering
Volume 24, Issue 9
Abstract
A shake table experiment of a large-scale, two-span accelerated bridge construction (ABC) bridge model with steel superstructure incorporating six of the more promising ABC connections was conducted on shake tables at the University of Nevada, Reno. The objective was to investigate the seismic performance of the ABC connections integrated into a bridge system and to determine whether ABC bridges can demonstrate adequate load path, integrity, and constructability. The bridge model was subjected to successive bidirectional motions simulating a modified version of the Northridge 1994 earthquake record. Test results showed that the ABC bridge emulated the behavior of cast-in-place bridge columns by undergoing large inelastic deformations in a ductile manner by forming plastic hinges and extensive yielding of the longitudinal bars in the columns. Structural integrity was maintained in all connections through various earthquake levels. Construction procedure of the bridge model ensured the feasibility of handling and connecting different prefabricated members.
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Acknowledgments
The study presented in this article was supported by the Accelerated Bridge Construction University Transportation Center (ABC-UTC) at Florida International University (FIU). This study would not have been possible without the assistance and advice of the University Nevada Reno Earthquake Engineering Laboratory staff including Dr. Patrick Laplace, Chad Lyttle, Todd Lyttle, and Mark Lattin. The support and advice of ABC-UTC director Dr. Atorod Azizinamini is greatly appreciated. The authors thank Mojtaba Alian, Jose Benjumea Royero, Jared Jones, Amir Sadeghnezhad, Dr. Alireza Mohebbi, and Dr. Ali Mehrsoroush. The authors also would like to thank Lafarge North America Inc. for donating ultrahigh-performance concrete material; C&K Johnson Industries for donating corrugated metal ducts; Reno Iron Works for fabrication of steel girders at a reduced cost; and NSBA for donating steel material for the girders, cross frames, and other accessories.
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© 2019 American Society of Civil Engineers.
History
Received: Aug 3, 2018
Accepted: Apr 3, 2019
Published online: Jul 4, 2019
Published in print: Sep 1, 2019
Discussion open until: Dec 4, 2019
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