Seismic Performance of Low-to-Moderate Height Eccentrically Braced Steel Frames Designed for North American Seismic Conditions
Publication: Journal of Structural Engineering
Volume 138, Issue 12
Abstract
The global seismic response of 3- and 8-story eccentrically braced frames (EBFs), designed for western and eastern North American locations, is studied using nonlinear time history analysis. Analytical models were built in three computer programs. Similar maximum forces were obtained, but the inelastic deformation predictions at the element and global structural levels showed sensitivity to the modeling employed. This feature should be considered in seismic performance assessment or design. Current design methods failed to predict interstory drifts and plastic link rotations, but the study confirmed the strong correlation between the two parameters associated with rigid-plastic behavior. The influence of yielding and flexural buckling of frame members, other than the links on the global frame performance, was evaluated using the OpenSees model. It was confirmed that the flexural yielding of outer beams is acceptable for EBFs with short and intermediate links, if the combined flexural strength of the braces and beams is at least equal to the expected end-link moments and the braces can resist the associated axial force-bending moment demand. Inelastic response of braces and columns in such frames did not negatively impact the overall frame behavior.
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Acknowledgments
This study was financially supported by the Natural Science and Engineering Research Council of Canada. We thank Professor Taichiro Okazaki from the University of Minnesota for providing the test data on EBF shear links and Professor James Ricles from Lehigh University for providing the ANSR-1 software with the link element. Charles-Philippe Lamarche, former Ph.D. Candidate at Ecole Polytechnique of Montreal, is also acknowledged for his valuable contribution to the development of the OpenSees models.
References
Aguero, A., Izvernari, C., and Tremblay, R. (2006). “Modeling of the seismic response of concentrically braced steel frames using the OpenSees analysis environment.” Int. J. Adv. Steel Construct., 2(3), 242–274.
AISC. (2005). “Seismic provisions for structural steel buildings.” ANSI/AISC 341s1-05, AISC, Chicago.
Canadian Standards Association (CSA). 2005. “Limit states design of steel structures.” CAN/CSA-S16-01, CSA, Willowdale, Canada.
Chao, S.-H., and Goel, S. (2005). “Performance-based seismic design of eccentrically braced frames using target drift and yield mechanism as performance criteria.” Rep. UMCEE-05-05, Univ. of Michigan, Ann Arbor, MI.
Engelhardt, M. D., and Popov, E. P. (1989). “On design of eccentrically braced frames.” Earthquake Spect., 5(3), 495–511.
Galambos, T. V. and Ketter, R. L. (1959). “Columns under combined bending and thrust.” J. Eng. Mech. Div., 85(2), 135–152.
Kemp, A. R. (1996). “Inelastic local and lateral buckling in design codes.” J. Struct. Eng., 122(4), 374–382.
Koboevic, S. (2000). “An approach to seismic design of eccentrically braced frames.” Ph.D. thesis, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., Montreal.
Koboevic, S., and David, S. O. (2010). “Design and seismic behavior of taller eccentrically braced frames.” Can. J. Civ. Eng., 37(2), 195–208.
Koboevic, S., and Redwood, R. (1997). “Design and seismic response of shear critical eccentrically braced frames.” Can. J. Civ. Eng., 24(5), 761–771.
Koboevic, S., Rozon, J., and Tremblay, R. (2009). “Relationship between global and local indicators of the performance of eccentrically braced frames under seismic loads.” Proc., 6th Int. Conf. on Behavior of Steel Structures in Seismic Areas (STESSA) 2009, Taylor and Francis, London.
Lamarche, C.-P., and Tremblay, R. (2008). “Accounting for residual stresses in the seismic stability of nonlinear beam-column elements with cross-section fiber discretization.” Proc., 2008 Structural Stability Research Council (SSRC) Annual Stabil. Conf., Structural Stability Research Council, Nashville, TN, 59–78.
Mazzoni, S., McKenna, F., Scott, M. H., and Fenves, G. L. (2006). “Open system for earthquake engineering simulation, user command-language manual.” Pacific Earthquake Engineering Research Center, Univ. of California, Berkeley, CA.
Mondkar, D. P., and Powell, G. H. (1975). “ANSR-1 general purpose program for analysis of nonlinear structural response.” Rep. EERC 75-37, Earthquake Engineering Research Center, College of Engineering, Univ. of California, Berkeley, CA.
National Building Code of Canada (NBCC). (2005). National Building Code of Canada 2005. National Research Council of Canada, Ottawa.
Okazaki, T., Arce, G., Ryu, H., and Engelhardt, M. (2005). “Experimental study of local buckling, overstrength, and fracture of links in eccentrically braced frames.” J. Struct. Eng., 131(10), 1526–1535.
Okazaki, T., Liu, D., Nakashima, M., and Engelhardt, M. (2006). “Stability requirements for beams in seismic steel moment frames.” J. Struct. Eng., 132(9), 1334–1342.
Pacific Earthquake Engineering Research Center (PEER). (2006). PEER-NGA database, Pacific Earthquake Engineering Research Center, 〈http://peer.berkeley.edu/smcat〉 (Oct. 20, 2007).
Popov, E. P., Ricles, J. M., and Kasai, K. (1992). “Methodology for optimum EBF link design.” Proc.,10th World Conference of Earthquake Engineering, Balkema, Rotterdam, Netherlands, Vol. 7, 3983–3988.
Prakash, V., and Powell, G. H. (1993). “DRAIN-2DX, DRAIN-3DX and DRAIN BUILDING: Base program design documentation.” Rep. UCB/SEMM-93/17, Univ. of California, Berkeley, CA.
Ramadan, T., and Ghobarah, A. (1995). “Analytical model for shear-link behavior.” J. Struct. Eng., 121(11), 1574–1580.
Richards, P. W., and Uang, C.-M. (2006). “Testing protocol for short links in eccentrically braced frames.” J. Struct. Eng., 132(8), 1183–1191.
Ricles, J. M., and Popov, E. P. (1994). “Inelastic link element for EBF seismic analysis.” J. Struct. Eng., 120(2), 441–463.
Rozon, J. 2009. “Étude du comportement global des cadres à contreventement excentrique de faible et moyenne hauteur.” M.S. thesis, Dept. of Civil, Geological and Mining Engineering, École Polytechnique de Montréal, Montréal (in French).
Tremblay, R., Archambault, M.-H., and Filiatrault, A. (2003). “Seismic response of concentrically braced steel frames made with rectangular hollow bracing members.” J. Struct. Eng., 129(12), 1626–1636.
Tremblay, R., and Atkinson, G. M. (2001). “Comparative study of the inelastic seismic demand of eastern and western sites.” Earthquake Spect., 17(2), 333–358.
Tremblay, R., and Robert, N. (2001). “Seismic performance of low- and medium-rise chevron braced steel frames.” Can. J. Civ. Eng., 28(4), 699–714.
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© 2012 American Society of Civil Engineers.
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Received: Mar 1, 2010
Accepted: May 20, 2011
Published online: Nov 15, 2012
Published in print: Dec 1, 2012
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