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The Effect of Frame Geometry on the Seismic Response of Self-Centering Concentrically- Braced Frames

Authors: David A. Roke, M. R. Hasan


Conventional concentrically-braced frame (CBF) systems have limited drift capacity before brace buckling and related damage leads to deterioration in strength and stiffness. Self-centering concentrically-braced frame (SC-CBF) systems have been developed to increase drift capacity prior to initiation of damage and minimize residual drift. SC-CBFs differ from conventional CBFs in that the SC-CBF columns are designed to uplift from the foundation at a specified level of lateral loading, initiating a rigid-body rotation (rocking) of the frame. Vertically-aligned post-tensioning bars resist uplift and provide a restoring force to return the SC-CBF columns to the foundation (self-centering the system). This paper presents a parametric study of different prototype buildings using SC-CBFs. The bay widths of the SC-CBFs have been varied in these buildings to study different geometries. Nonlinear numerical analyses of the different SC-CBFs are presented to illustrate the effect of frame geometry on the behavior and dynamic response of the SC-CBF system.

Keywords: Nonlinear Analysis, Earthquake Resistant Structures, Seismic Analysis, self-centering structural systems

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[1] Fahnestock, L.A.; Sause, R.; &Ricles, J.M. (2007a). "Seismic Response and Performance of Buckling-Restrained Braced Frames," ASCE Journal of Structural Engineering 133(9): 1195-1204.
[2] Fahnestock, L.A.; Sause, R.; &Ricles, J.M. (2007b). "Experimental Evaluation of a Large-Scale Buckling-Restrained Braced Frame," ASCE Journal of Structural Engineering 133(9): 1205-1214.
[3] Roke, D; Sause, R.; Ricles, J.M.; Seo, C.-Y.; & Lee, K.S. (2006). "Self- Centering Sesimic-Resistant Steel Concentrically-Braced Frames," Proceedings of the 8th U.S. National Conference on Earthquake Engineering, EERI, San Francisco, USA.
[4] Roke, D; Sause, R.; Ricles, J.M.; & Chancellor, N.B. (2008). "Design Concepts for Damage-Free Sesimic-Resistant Self-Centering Steel Concentrically-Braced Frames," Proceedings of the 14th World Conference on Earthquake Engineering, Beijing, China.
[5] Roke, D.; Sause, R.; Ricles, J.M.; & Chancellor, N.B. (2010). "Damage- Free Seismic-Resistant Self-Centering Concentrically-Braced Frames." ATLSS Report 10-09, Lehigh University, Bethlehem, PA, USA.
[6] ASCE (2010).Minimum Design Loads for Buildings and Other Structures, ASCE7-10.American Society of Civil Engineers, Reston, VA, USA.
[7] Mazzoni, S.; McKenna, F.; Scott, M.H.; Fenves, G.L.; et al. (2009).Open System for Earthquake Engineering Simulation (OpenSEES) User Command-Language Manual. Pacific Earthquake Engineering Research Center, University of California, Berkeley.