Commenced in January 2007
Paper Count: 31584
Multi-Objective Optimization for Performance-based Seismic Retrofit using Connection Upgrade
Abstract:The unanticipated brittle fracture of connection of the steel moment resisting frame (SMRF) occurred in 1994 the Northridge earthquake. Since then, the researches for the vulnerability of connection of the existing SMRF and for rehabilitation of those buildings were conducted. This paper suggests performance-based optimal seismic retrofit technique using connection upgrade. For optimal design, a multi-objective genetic algorithm(NSGA-II) is used. One of the two objective functions is to minimize initial cost and another objective function is to minimize lifetime seismic damages cost. The optimal algorithm proposed in this paper is performed satisfying specified performance objective based on FEMA 356. The nonlinear static analysis is performed for structural seismic performance evaluation. A numerical example of SAC benchmark SMRF is provided using the performance-based optimal seismic retrofit technique proposed in this paper
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1334169Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1821
 H. Krawinkler, "The state of the art report on systems performance of moment resisting steel frames subjected to earthquake ground shaking," SAC Rep. No. FEMA 355c, Federal Emergency Management Agency, Washington, D.C, 2000
 C. Roeder, "The state-of-art report on connection performance," SAC Rep. No. FEMA 355d, Federal Emergency Management Agency, Washington, D.C, 2000.
 E. Reis, "The state-of art report on past performance of steel moment-frame buildings in earthquakes,"SAC Rep. No. FEMA 355e, Federal Emergency Management Agency ,Washington, D.C, 2000.
 D.A. Foutch, "The state-of art report on performance prediction and evaluation of steel moment-frame buildings," SAC Rep. No. FEMA 355f, Federal Emergency Management Agency, Washington, D.C, 2000.
 W. Liu, J. D. Given, R. Kanitkar, and C. Blaney, "Seismic evaluation and rehabilitation of a three story pre-northridge steel frame essential service facility," ATC & SEI 2009 Conference on Improving the Seismic Performance of Existing Buildings and Other Structures, ASCE, 2009, pp. 56-67.
 I. J. Malley, M. Sinclair, T. Graf, C. Blaney, M. Fraynt, C. Uang, J. Newell, and T. Ahmed, "Seismic upgrade of a 15-story steel moment frame building satisfying performance criteria with application of experimental and analytical procedures," ATC & SEI 2009 Conference on Improving the Seismic Performance of Existing Buildings and Other Structures, ASCE, 2009, pp. 75-84.
 S. Hussain, P. Van Benschoten, A. Nerurkar, M. Al Satari, and T. Guttema, "Viscous Fluid Damper Retrofit of Pre-Northridge Steel Moment Frame Structures," Proceedings of the 75th SEAOC Annual Convention, Long Beach, 2006.
 A. Cale, and B. Stacy, "Seismic rehabilitation of an existing braced frame hospital building by direct replacement with bucking-restrained braces, ATC & SEI 2009 Conference on Improving the Seismic Performance of Existing Buildings and Other Structures, ASCE, 2009, pp. 68-74.
 B.K.Oh, "Optimization for performance-based seismic retrofit of existing steel moment resisting frames using connection upgrade," Thesis, University of Yonsei, 2011.
 "Prestandard and commentary for the seismic rehabilitation of buildings" SAC Rep. No.FEMA 356, Federal Emergency Management Agency, Washington, D.C, 2000.
 K. Deb, A. Pratap, S. Agrawal, T. Meyarivan, "A fast and elitist multiobjective genetic algorithm: NSGA-II," 2002, IEEE Transactions on Evolutionary Computation, 6(2) pp. 182-197.
 K. Lee, and D.A Foutch, "Seismic Performance Evaluation of Pre-Northridge Steel Frame Buildings with Brittle Connections," Journal of Structural Engineering, ASCE, 2002, Vol. 128, No. 4, pp. 546-555.
 D.A Foutch, and S.Y. Yun, "Modeling of steel moment frames for seismic loads," Journal of Constructional Steel Research, 2002, Vol. 58, pp. 529-564.
 R. O. Hamberger, "Recommencded Seismic Design Criteria for New Steel Moment-Frame Buildings,"SAC Rep. No.FEMA 350, Federal Emergency Management Agency, Washington, D.C, 2000.
 "Recommended seismic evaluation and upgrade criteria for existing welded steel moment-frame buildings," SAC Rep. No. FEMA 351, Federal Emergency Management Agency , Washington, D.C, 2000.
 AISC/NIST. Steel Design Guide Series 12, "Modification of Existing Welded Steel Moment Frame Connections for Seismic Resistance," AISC, 1999, Chicago, Illinois: American Institute of Steel Construction.
 B. Chi, C.M. Uang, and A. Chen, "Seismic Rehabilitation of Pre-Northridge Steel Moment Connections: A Case Study," Journal of Constructional Steel Research. 62 783-792, 2006.
 L.T. Kien, K. Lee, J. Lee, and D.H. Lee, "Seismic Demand Evaluation of Steel MRF Buildings with Simple and Detailed Connection Models," International Journal of Steel Structures, 10(1) 15-34, 2010.
 Y.J. Kang, and Y.K. Wen, "Minimum life-cycle cost structural design against natural hazards," Structural research series No. 629, Department of Civil andEnviron mental Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 2000.
 S. Shi, "Evaluation of connection fracture and hysteresis type on the seismic response of steel buildings," Thesis, University of Illinois, Urbana, Illinois, 1997.
 M. Liu, Y.K. Wen, and S. A. Burns, "Life cycle cost oriented seismic design optimization of steel moment frame structures with risk-taking preference," Engineering Structures, 2004(26), pp.1407-1421.