Cyclic Tests of Precast Pretensioned Rocking Bridge-Column Subassemblies
Publication: Journal of Structural Engineering
Volume 143, Issue 9
Abstract
Rocking columns reinforced with unbonded prestressing offer advantages for bridges constructed in seismic regions because they can recenter the structure after an earthquake. Under lateral load, the columns rock on the foundation and cap beam, and rotate as rigid bodies rather than deforming. This paper describes cyclic load tests of two subassemblies representing parts of a bridge bent constructed using precast pretensioned rocking columns, spread footings, and a precast cap beam. The subassemblies, representing two halves of a single column, were subjected to cyclic lateral displacements of increasing amplitude under a constant vertical load. The proposed column design has several advantages over conventional cast-in-place construction. The use of precast columns and cap beams reduces on-site construction time. The use of unbonded prestressing minimizes residual displacements after an earthquake. The strands are deliberately debonded through the clear height of the column and bonded to the column concrete at the top and bottom, where the column is embedded in the cap beam and footing, respectively. The columns are confined by steel tubes and annular end plates at their interfaces with the footings and cap beams to minimize concrete damage when the columns rock. In the tests, the columns returned to their initial location with essentially no concrete damage after being displaced to peak drift ratios exceeding 10%. At the end of the tests, the columns’ lateral strengths still exceeded 80% of their peak values. The tests also provided the opportunity to evaluate practical procedures for proportioning key details of the system.
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Acknowledgments
This research was supported by the National Science Foundation George Brown Network for Earthquake Engineering Systems (NEES) Research Program (CMMI-1207903), the Pacific Earthquake Engineering Research Center, the United States Air Force, and the Valle Foundation of the University of Washington. The findings and conclusions contained herein are those of the authors alone. The tests were conducted with the help of graduate students Lisa Berg, Olafur Haraldsson, Spencer Livermore, Kevin Martin, Tony Nguyen, Max Stephens, and Hung Viet Tran. Further help was provided by undergraduate students Sam Adiputra, Matt Brosman, Nathan Clemens, David Lam, Scott Laws, Kevin Tsuchida, Hin-Kei Wong, and Chase Young. The assistance of Professor Emeritus Donald Janssen, Structures Laboratory Manager Vince Chaijaroen, and Materials Laboratory Manager Yiming Liu is also gratefully acknowledged.
References
AASHTO. (2014). “AASHTO LRFD bridge design specifications.” Washington, DC.
Billington, S. L., and Yoon, J. K. (2004). “Cyclic response of precast bridge columns with ductile fiber-reinforced concrete.” J. Bridge Eng., 353–363.
Brown, W. A. (2008). “Effect of spiral properties on bar buckling in bridge columns.” M.S.C.E. thesis, Univ. of Washington, Seattle.
Building Seismic Safety Council for FEMA. (2004). “NEHRP recommended provisions for seismic regulations for new buildings and other structures.”, National Institute of Building Sciences, Washington, DC.
Chou, C. C., and Chen, Y. C. (2006). “Cyclic tests of post-tensioned precast CFT segmental bridge columns with unbonded strands.” Earthquake Eng. Struct. Dyn., 35(2), 159–175.
Cohagen, L. S., Pang, J. B. K., Eberhard, M. O., and Stanton, J. F. (2008). “A precast concrete bridge bent designed to re-center after an earthquake.”, Washington State Dept. of Transportation, Olympia, WA.
Cousins, T. E., Johnston, D. W., and Zia, P. (1990). “Transfer and development length of epoxy coated and uncoated prestressing strand.” PCI J., 35(4), 92–103.
Davis, P. M., Janes, T. M., Eberhard, M. O., and Stanton, J. F. (2012). “Unbonded pre-tensioned columns for bridges in seismic regions.”, Pacific Earthquake Engineering Research Center, Berkeley, CA.
ElGawady, M., Booker, A., and Dawood, H. (2010). “Seismic behavior of posttensioned concrete-filled fiber tubes.” J. Compos. Constr., 616–628.
FHWA (Federal Highway Administration). (2011). “Accelerated bridge construction: Experience in design, fabrication and erection of prefabricated elements and systems.” FHWA-HIF-12-013, U.S. Dept. of Transportation, Washington, DC.
Finnsson, G. (2013). “Unbonded pre-tensioned bridge columns with hybrid fiber-reinforced concrete shells.” M.S.C.E. thesis, Univ. of Washington, Seattle.
Galusha, J. (1999). “Precast, post-tensioned concrete walls designed to rock.” M.S.C.E. thesis, Univ. of Washington, Seattle.
Guerrini, G., Restrepo, J., Massari, M., and Vervelidis, A. (2015). “Seismic behavior of post-tensioned self-centering precast concrete dual-shell steel columns.” J. Struct. Eng., 04014115.
Haber, Z., Saiidi, M., and Sanders, D. (2014). “Seismic performance of precast columns with mechanically spliced column-footing connections.” ACI Struct. J., 111(3), 639–650.
Haraldsson, O. S. (2015). “A pre-tensioned bent system for accelerated construction in seismic regions.” Ph.D. thesis, Dept. of Civil and Environmental Engineering, Univ. of Washington, Seattle.
Haraldsson, O. S., Janes, T. M., Eberhard, M. O., and Stanton, J. F. (2013). “Seismic resistance of socket connection between footing and precast column.” J. Bridge Eng., 910–919.
Hewes, J. T., and Priestley, N. M. J. (2002). “Seismic design and performance of precast concrete segmental bridge columns.”, State of California Dept. of Transportation, Sacramento, CA.
Ishizuka, T., Hawkins, N. M., and Stanton, J. F. (1984). “Experimental study of the seismic resistance of a concrete exterior column beam sub-assemblage containing unbonded post-tensioning tendons.” Dept. of Civil Engineering, Univ. of Washington, Seattle.
Kennedy, B. (2015). “Rocking connection between a precast bridge column and cap beam.” Master’s thesis, Dept. of Civil and Environmental Engineering, Univ. of Washington, Seattle.
Kennedy, B. J., Thonstad, T., Eberhard, M. O., and Stanton, J. F. (2014). “Cyclic testing of an unbonded pre-tensioned bridge column with rocking detail: Capbeam specimen.” Network for Earthquake Engineering Simulation, Univ. of Washington, Seattle.
Khaleghi, B., et al. (2012). “Accelerated bridge construction in Washington State: From research to practice.” PCI J., 57(4), 34–49.
Mantawy, I., Thonstad, T., Sanders, D., Stanton, J., and Eberhard, M. (2016). “Seismic performance of precast, pretensioned, and cast-in-place bridges: Shake table test comparison.” J. Bridge Eng., 04016071.
Marriott, D., Pampanin, S., and Palermo, A. (2009). “Quasi-static and pseudo-dynamic testing of unbonded post-tensioned rocking bridge piers with external replaceable dissipaters.” Earthquake Eng. Struct. Dyn., 38(3), 331–354.
Marsh, L. M., Wernli, M., Garrett, B. E., Stanton, J. F., Eberhard, M. O., and Weinert, M. D. (2011). “Application of accelerated bridge construction connections in moderate-to-high seismic regions.”, Transportation Research Board, Washington, DC.
Mashal, M., and Palermo, A. (2014). “Quasi-static experimental testing of emulative and low-damage seismic technologies for accelerated bridge construction (ABC) in seismic areas.” Proc., National Accelerated Bridge Construction Conf., Miami.
Matsumoto, E., Waggoner, M., Kreger, M., Vogel, J., and Wolf, L. (2008). “Development of a precast concrete bent-cap system.” PCI J., 53(3), 74–99.
Mole, A. (1993). “Seismic response of hybrid connections in precast concrete frames.” M.S.C.E. thesis, Univ. of Washington, Seattle.
Motaref, S., Saiidi, M., and Sanders, D. (2014). “Shake table studies of energy-dissipating segmental bridge columns.” J. Bridge Eng., 186–199.
Ou, Y. C., Tsai, M. S., Chang, K. C., and Lee, G. C. (2010). “Cyclic behavior of precast segmental concrete bridge columns with high performance or conventional steel reinforcing bars as energy dissipation bars.” Earthquake Eng. Struct. Dyn., 39(11), 1181–1198.
Palermo, A., Pampanin, S., and Marriott, D. (2007). “Design, modeling, and experimental response of seismic resistant bridge piers with posttensioned dissipating connections.” J. Struct. Eng., 1648–1661.
Pang, J. B. K., Eberhard, M. O., and Stanton, J. F. (2010). “Large-bar connection for precast bridge bents in seismic regions.” J. Bridge Eng., 231–239.
Priestley, M. J. N., and Tao, J. R. (1993). “Seismic response of precast prestressed concrete frames with partially debonded tendons.” PCI J., 38(1), 58–69.
Priestley, M. J. N., Sritharan, S., Conley, J. R., and Pampanin, S. (1999). “Preliminary results and conclusions from the PRESS five-story precast concrete test building.” PCI J., 44(6), 42–67.
Raynor, D. J. (2000). “Bond assessment of hybrid frame continuity reinforcement.” M.S.C.E. thesis, Univ. of Washington, Seattle.
Restrepo, J., and Rahman, A. (2007). “Seismic performance of self-centering structural walls incorporating energy dissipators.” J. Struct. Eng., 1560–1570.
Schaefer, J. A., Kennedy, B., Stanton, J. F., and Eberhard, M. O. (2014a). “Unbonded pretensioned bridge columns with rocking detail.”, Pacific Earthquake Engineering Research Center, Berkeley, CA.
Schaefer, J. A., Thonstad, T., Kennedy, B. J., Eberhard, M. O., and Stanton, J. F. (2014b). “Cyclic testing of an unbonded pre-tensioned bridge column with rocking detail: Footing specimen 01.” Network for Earthquake Engineering Simulation, Univ. of Washington, Seattle.
Solberg, K., Mashiko, N., Mander, J., and Dhakal, R. (2009). “Performance of a damage-protected highway bridge pier subjected to bidirectional earthquake attack.” J. Struct. Eng., 469–478.
Stone, W. C., Cheok, G. S., and Stanton, J. F. (1995). “Beam-column connections subjected to cyclic loads.” ACI Struct. J., 92(2), 229–249.
Tran, H. V. (2015). “Drilled shaft socket connections for precast columns in seismic regions.” Ph.D. thesis, Univ. of Washington, Seattle.
Trono, W., Jen, G., Panagiotou, M., Schoettler, M., and Ostertag, C. P. (2015). “Seismic response of a damage-resistant recentering posttensioned-HYFRC bridge column.” J. Bridge Eng., 04014096.
Walsh, K. Q., and Kurama, Y. C. (2012). “Effects of loading conditions on the behavior of unbonded post-tensioning strand-anchorage systems.” PCI J., 57(1), 76–96.
White, S., and Palermo, A. (2016). “Quasi-static testing of posttensioned nonemulative column-footing connections for bridge piers.” J. Bridge Eng., 04016025.
Wight, G., and Ingham, J. (2008). “Tendon stress in unbonded posttensioned masonry walls at nominal in-plane strength.” J. Struct. Eng., 938–946.
Yamashita, R., and Sanders, D. (2009). “Seismic performance of precast unbonded prestressed concrete columns.” ACI Struct. J., 106(6), 821–830.
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©2017 American Society of Civil Engineers.
History
Received: Jul 23, 2015
Accepted: Feb 21, 2017
Published online: May 22, 2017
Published in print: Sep 1, 2017
Discussion open until: Oct 22, 2017
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