Prestressed Pile to Bent Cap Connections: Seismic Performance of a Full-Scale Three-Pile Specimen
Publication: Journal of Bridge Engineering
Volume 19, Issue 3
Abstract
The South Carolina DOT employs a detail in which piles are plainly embedded into bent caps without the use of any special detailing to the pile. The behavior of these connections is of special concern in areas where seismic activity poses a threat to infrastructure. This paper discusses the experimental results of a full-scale three-pile bent specimen subjected to a modified earthquake displacement history. This study is significant in the type of loading applied, the scale of the specimen, the inclusion of multiple piles, and the evaluation of differing bent cap reinforcement designs. The specimen was the culmination of an experimental research effort that included eight full-scale single-pile specimens. Results of the full-scale experiment and a numerical model are used for evaluation of the connection as well as comparison between differing reinforcement designs at exterior ends of the bent cap. These results include concrete cracking and spalling, strand slippage, ductility, and the amount of confinement at each connection.
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Acknowledgments
The authors thank and acknowledge the financial contributions of both the SCDOT and the Federal Highway Administration (FHWA). Further thanks are extended to the tremendous work of the laboratory staffs at both the U.SC and UNR. Special thanks are also extended to Mr. J. R. Parimuha and staff at Florence Concrete Products. The opinions, findings, and conclusions expressed in this paper are those of the authors and do not necessarily reflect those of the SCDOT.
References
American Concrete Institute (ACI). (1992). “Prediction of creep, shrinkage, and temperature effects in concrete structures.” ACI 209R-92, Farmington Hills, MI.
American Concrete Institute (ACI). (2011). “Building code requirements for structural concrete.” ACI 318-08, Farmington Hills, MI.
ASTM. (2007). “Standard specification for steel wire, plain, for concrete reinforcement.” ASTM A82, West Conshohocken, PA.
ASTM. (2009). “Standard specification for low-alloy steel deformed and plain bars for concrete reinforcement.” ASTM A706, West Conshohocken, PA.
ASTM. (2010). “Standard specification for steel strand, uncoated seven-wire for prestressed concrete.” ASTM A416, West Conshohocken, PA.
ASTM. (2012). “Standard test method for compressive strength of cylindrical concrete specimens.” ASTM C39, West Conshohocken, PA.
ElBatanouny, M. K., and Ziehl, P. H. (2012). “Determining slipping stress of prestressing strands in confined sections.” ACI Struct. J., 109(6), 767–776.
ElBatanouny, M. K., Ziehl, P. H., Larosche, A., Mays, T., and Caicedo, J. M. (2012). “Bent-cap confining stress effect on the slip of prestressing strands.” ACI Struct. J., 109(4), 487–496.
Harries, K. A., and Petrou, M. F. (2001). “Behavior of precast, prestressed concrete pile to cast-in-place pile cap connections.” PCI J., 46(4), 82–93.
Joen, P. H., and Park, R. (1990). “Simulated seismic load tests on prestressed concrete piles and pile-pile cap connections.” PCI J., 35(6), 42–61.
Krier, C. J. (2006). “Seismic testing of full-scale precast prestressed pile to deck connections.” M.S. thesis, Univ. of California, San Diego.
Laplace, P. N., Sanders, D. H., Saiidi, M. S., Douglas, B. M., and El-Azazy, S. (2005). “Performance of concrete bridge columns under shaketable excitation.” ACI Struct. J., 102(3), 438–444.
Larosche, A., Ziehl, P., ElBatanouny, M. K., and Caicedo, J. (2013). “Plain pile embedment for exterior bent cap connections in seismic regions.” J. Bridge Eng., (Aug. 2, 2013).
Mander, J. B., Priestley, M. J. N., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 1804–1826.
Roeder, C. W., Graff, R., Soderstrom, J. L., and Yoo, J. H. (2002). “Seismic performance of pile-wharf connections.” PEER-2002/07, Pacific Earthquake Engineering Research Center, Univ. of California, Berkeley, CA.
SAP2000 14 [Computer software]. Walnut Creek, CA, Computers and Structures.
Shahawy, M. A., and Issa, M. (1992). “Effect of pile embedment on the development length of prestressing strands.” PCI J., 37(6), 44–59.
Shahawy, M., Issa, M., and Polodna, M. (1990). “Development length of prestressed concrete piles.” Rep. No. SSR-01-90, Florida DOT, Tallahassee, FL.
Sheppard, D. A. (1983). “Seismic design of prestressed concrete piling.” PCI J., 28(2), 20–49.
Silva, P. F., and Sritharan, S. (2011). “Seismic performance of a concrete bridge bent consisting of three steel shell columns.” Earthq. Spectra, 27(1), 107–132.
Silva, P. F., Sritharan, S., Seible, F., and Priestley, M. J. N. (1999). “Full-scale test of the Alaska cast-in-place steel shell three column bridge bent.” Rep. No. SSRP 98/13 FHWA-AK-RD-99-02, Alaska Dept. of Transportation and Public Facilities, Juneau, AK.
South Carolina DOT (SCDOT). (2006). Bridge design manual, Columbia, SC.
South Carolina DOT (SCDOT). (2008). SCDOT seismic design specifications for highway bridges, version 2.0, Columbia, SC.
Sritharan, S., and Priestley, M. J. N. (1998). “Seismic testing of a full-scale pile-deck connection utilizing headed reinforcement.” Rep. No. TR-98/14, Univ. of California, San Diego.
USGS. (2011). “South Carolina earthquake history.” 〈http://earthquake.usgs.gov/earthquakes/states/south_carolina/history.php〉 (Mar. 25, 2011).
XTRACT 3.0.8 [Computer software]. Rancho Cordova, CA, TRC Software.
Ziehl, P. H., Caicedo, J. M., Rizos, D., and Mays, T. W. (2012). “Behavior of pile to bent cap connections subjected to seismic forces.” Rep. No. FHWA-SC-12-03, South Carolina DOT, Columbia, SC.
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Information
Published In
Journal of Bridge Engineering
Volume 19 • Issue 3 • March 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Nov 16, 2012
Accepted: Sep 24, 2013
Published online: Sep 26, 2013
Published in print: Mar 1, 2014
Discussion open until: May 10, 2014
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