Seismic Behavior of a Concrete/Steel Integral Bridge Pier System
Publication: Journal of Structural Engineering
Volume 131, Issue 7
Abstract
This paper summarizes an experimental study on an integral bridge pier system consisting of a concrete column, steel girders, and a box-shaped steel cap beam that is suitable for applications in seismic regions. Using two -scale test units, the research examined suitable connections between the concrete column and the steel cap beam and between the steel cap beam and steel girders as well as the overall seismic behavior of the proposed system. The anchorage length requirement for the column longitudinal bars governed the depths of the cap beam and girders in the first unit. Employing mechanical anchorage at the ends of the column longitudinal bars, the required anchorage length for the column bars was reduced in the second unit, thereby enabling the use of shallower and lighter cap beam and girders. Both test units exhibited satisfactory seismic response up to the target displacement ductilities with the intentional formation of plastic hinges in the columns. The description of the test units and key experimental results are included in this paper.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The research project described in this paper was funded by the Transportation Research Board as NCHRP Project No. UNSPECIFIED12-54. The writers gratefully acknowledge the advice and assistance provided by an NCHRP panel that was chaired by Mr. Mark Reno and coordinated by Mr. David Beal. From Modjeski and Masters, Inc., Dr. John Kulicki served as the administrative officer for this research project and Mr. Dustin Davis assisted with analysis of the prototype bridge. Seismic testing of the -scale laboratory models was conducted in the Structural Engineering Laboratory at Iowa State University with extensive help from Mr. Doug Wood, the laboratory manager, Mr. Ryan Staudt, a former ISU graduate student, and several other undergraduate student employees.
References
American Association of State Highway and Transportation Officials (AASHTO). (1998). LRFD Bridge Design Specifications, 2nd Ed., Washington, D.C.
American Concrete Institute (ACI) Committee 318. (2002). “Building code requirements for structural concrete.” ACI 313-02 and “Commentary.” ACI 318R-02, Farmington Hills, Mich.
Applied Technology Council (ATC). (1996). “Improved seismic design criteria for California bridges: Provisional recommendations.” ATC-32, Redwood City, Calif.
California Department of Transportation (Caltrans). (2001). “Seismic design criteria.” Version 1.2, Sacramento, Calif.
Holombo, J., Priestley, M. J. N., and Seible, F. (2000). “Continuity of precast prestressed spliced-girder bridges under seismic loads.” PCI J., 45(2), 40–63.
Patty, J., Seible, F., and Uang, C.-M. (2002). “Seismic response of integral bridge connections.” Structural Systems Research Project, Rep. No. SSRP 2000/16, Dept. of Structural Engineering, Univ. of California, San Diego.
Priestly, M. J. N., Seible, F., and Calvi, G. M. (1996). Seismic design and retrofit of bridges, Wiley, New York.
Sritharan, S., Abendroth, R. E., Greimann, L. F., Wassef, W. J., and Van der Werff, J. (2002). “Seismic performance of a concrete column/steel cap/steel girder integral bridge system.” Proc., 3rd National Seismic Conf. & Workshop on Bridges & Highways, Portland, Ore.
Sritharan, S., and Ingham, J. M. (2003). “Application of strut-and-tie concepts to concrete bridge joints in seismic regions.” PCI J., 48(4), 66–89.
Sritharan, S., Priestley, M. J. N., and Seible, F. (1999). “Enhancing seismic performance of bridge cap beam/column joints using prestressing.” PCI J., 44(4), 74–91.
Sritharan, S., Priestley, M. J. N., and Seible, F. (2001). “Seismic design and experimental verification of concrete multiple column bridge bents.” ACI Struct. J., 98(3), 335–346.
Staudt, R. (2002). “Load distribution for steel girder-single concrete column integral pier bridges.” MS Research Rep., Dept. of Civil and Construction Engineering, Iowa State Univ., Ames, Iowa.
Vander Werff, J. R. (2002). “Steel girder-concrete column integral bridges for seismic regions.” MS Thesis, Iowa State Univ., Ames, Iowa.
Wassef, W. G. and Davis, D. D., and (Modjeski and Master, Inc.) and Sritharan, S., Vander Werff, J. R., Abendroth, R. E., and Greimann, L. F. (Iowa State Univ.). (2004). “Integral steel box-beam pier caps.” NCHRP Rep. No. 527, National Cooperative Highway Research Program, Transportation Research Board, Washington, D.C.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 131 • Issue 7 • July 2005
Pages: 1083 - 1094
Copyright
© 2005 ASCE.
History
Received: Mar 26, 2004
Accepted: Aug 23, 2004
Published online: Jul 1, 2005
Published in print: Jul 2005
Notes
Note. Associate Editor: Rob Y. H. Chai
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.