Effect of Load History on Performance Limit States of Circular Bridge Columns
Publication: Journal of Bridge Engineering
Volume 18, Issue 12
Abstract
In this paper, the importance of displacement history and its effects on performance limit states, the relationship between strain and displacement, and the spread of plasticity in RC structures is explored. An experimental study is underway to assess the performance of 30 circular, well-confined, bridge columns with varying lateral displacement history, transverse reinforcement detailing, axial load, aspect ratio, and longitudinal steel content. Eight of these columns, with similar geometry and detailing, were subjected to various unidirectional displacement histories including standardized laboratory reversed cyclic loading and re-creations of the displacement responses obtained from a nonlinear time-history analysis of multiple earthquakes with distinct characteristics. Longitudinal reinforcing bars were instrumented to obtain strain hysteresis, vertical strain profiles, cross section curvatures, curvature distributions, and fixed-end rotations attributable to strain penetration. Results have shown that the limit state of reinforcement bar buckling was influenced by load history, but the relationship between strain and displacement along the envelope curve was not. The main impact of load history on bar buckling is its influence on accumulated strains within the longitudinal reinforcement and transverse steel.
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Acknowledgments
The authors acknowledge the Alaska DOT and Public Facilities (DOT&PF) and Alaska University Transportation Center (AUTC), who supported this research through a series of grants. Special acknowledgment goes to Elmer Marx of the Alaska DOT&PF, who was closely involved in this research as the primary technical contact. The assistance of the entire staff of the Constructed Facilities Laboratory is appreciated.
References
Berry, M. P., and Eberhard, M. O. (2005). “Practical performance model for bar buckling.” J. Struct. Eng., 131(7), 1060–1070.
Bousias, S. N., Verzeletti, G., Fardis, M. N., and Gutierrez, E. (1995). “Load-path effects in column biaxial bending with axial force.” J. Eng. Mech., 121(5), 596–605.
Dutta, A., Mander, J. B., and Kokorina, T. (1999). “Retrofit for control and reparability of damage.” Earthq. Spectra, 15(4), 657–679.
Esmaeily, A., and Xiao, Y. (2002). “Seismic behavior of bridge columns subjected to various loading patterns.” PEER Rep. 2002/15, Pacific Earthquake Engineering Research Center, Berkeley, CA.
Esmaeily, A., and Xiao, Y. (2005). “Behavior of reinforced concrete columns under variable axial loads: Analysis.” ACI Struct. J., 102(5), 736–744.
Freytag, D. (2006). “Bar buckling in reinforced concrete bridge columns.” Master’s thesis, Univ. of Washington, Seattle.
Hines, E. M., Restrepo, J. I., and Seible, F. (2004). “Force-displacement characterization of well confined bridge piers.” ACI Struct. J., 101(4), 537–548.
King, D. J., Priestley, M. J. N., and Park, R. (1986). “Computer programs for concrete column design.” Research Rep. 86/12, Dept. of Civil Engineering, Univ. of Canterbury, Christchurch, New Zealand.
Kowalsky, M. J. (2000). “Deformation limit states for circular reinforced concrete bridge columns.” J. Struct. Eng., 126(8), 869–878.
Kunnath, S., El-Bahy, A., Taylor, A., and Stone, W. (1997). “Cumulative seismic damage of reinforced concrete bridge piers.” Technical Rep. NCEER-97-0006, National Center of Earthquake Engineering Research, Buffalo, NY.
Mander, J. B., Priestley, M. J. N., and Park, R. (1988). “Theoretical stress-strain model for confined concrete.” J. Struct. Eng., 114(8), 1804–1826.
Montejo, L. A., and Kowalsky, M. J. (2007). “CUMBIA—Set of codes for the analysis of reinforced concrete members.” Technical Rep. No. IS-07-01, North Carolina State Univ., Raleigh, NC.
Moyer, M. J., and Kowalsky, M. J. (2003). “Influence of tension strain on buckling of reinforcement in concrete columns.” ACI Struct. J., 100(1), 75–85.
Northern Digital Inc. (2013). “OPTOTRAK Certus HD dynamic measuring machine.” 〈http://www.ndigital.com/industrial/certushd.php〉 (Jan. 14, 2013).
Priestley, M. J. N., Calvi, G. M., and Kowalsky, M. J. (2007). Displacement-based seismic design of structures, IUSS Press, Pavia, Italy.
Priestley, M. J. N., Seible, F., and Calvi, G. M. (1996). Seismic design and retrofit of bridges, Wiley, New York.
Restrepo-Posada, J. I., Dodd, L. L., Park, R., and Cooke, N. (1994). “Variables affecting cyclic behavior of reinforcing steel.” J. Struct. Eng., 120(11), 3178–3196.
Rodriguez, M. E., Botero, J. C., and Villia, J. (1999). “Cyclic stress-strain behavior of reinforcing steel including effect of buckling.” J. Struct. Eng., 125(6), 605–612.
Structural Engineers Association of California (SEAOC). (1999). Recommended lateral force requirements and commentary, 7th Ed., Seismology Committee, Sacramento, CA.
Syntzirma, D. V., Pantazopoulou, S. J., and Aschheim, M. (2010). “Load-history effects on deformation capacity of flexural members limited by bar buckling.” J. Struct. Eng., 136(1), 1–11.
Wong, Y., Paulay, T., and Priestley, M. J. N. (1993). “Response of circular reinforced concrete columns to multi-directional seismic attack.” ACI Struct. J., 90(2), 180–191.
Zhao, J., and Sritharan, S. (2007). “Modeling of strain penetration effects in fiber-based analysis of reinforced concrete structures.” ACI Struct. J., 104(2), 133–141.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 18 • Issue 12 • December 2013
Pages: 1383 - 1396
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Oct 18, 2012
Accepted: Mar 22, 2013
Published online: Apr 1, 2013
Published in print: Dec 1, 2013
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