Steel and Composite Structures

Techno-Press (테크노프레스)
권호 표지
DOI QR코드

DOI QR Code

Cyclic testing of chevron braced steel frames with IPE shear panels

  • Zahrai, Seyed Mehdi (Center of Excellence for Engineering and Management of Civil Infrastructures, School Civil Engineering, College of Engineering, The University of Tehran)
  • Received : 2014.06.26
  • Accepted : 2015.04.27
  • Published : 2015.11.25
⟨ Previous Next ⟩

Abstract

Despite considerable life casualty and financial loss resulting from past earthquakes, many existing steel buildings are still seismically vulnerable as they have no lateral resistance or at least need some sort of retrofitting. Passive control methods with decreasing seismic demand and increasing ductility reduce rate of vulnerability of structures against earthquakes. One of the most effective and practical passive control methods is to use a shear panel system working as a ductile fuse in the structure. The shear Panel System, SPS, is located vertically between apex of two chevron braces and the flange of the floor beam. Seismic energy is highly dissipated through shear yielding of shear panel web while other elements of the structure remain almost elastic. In this paper, lateral behavior and related benefits of this system with narrow-flange link beams is experimentally investigated in chevron braced simple steel frames. For this purpose, five specimens with IPE (narrow-flange I section) shear panels were examined. All of the specimens showed high ductility and dissipated almost all input energy imposed to the structure. For example, maximum SPS shear distortion of 0.128-0.156 rad, overall ductility of 5.3-7.2, response modification factor of 7.1-11.2, and finally maximum equivalent viscous damping ratio of 35.5-40.2% in the last loading cycle corresponding to an average damping ratio of 26.7-30.6% were obtained. It was also shown that the beam, columns and braces remained elastic as expected. Considering this fact, by just changing the probably damaged shear panel pieces after earthquake, the structure can still be continuously used as another benefit of this proposed retrofitting system without the need to change the floor beam.

Keywords

References

  1. American Institute of Steel Construction (2010), Seismic provisions for structural steel buildings; AISC Chicago, IL, USA.
  2. Berman, J.W. and Bruneau, M. (2007), "Experimental and analytical investigation of tubular links for eccentrically braced frames", Eng. Struct., 29(8), 1929-1938. https://doi.org/10.1016/j.engstruct.2006.10.012
  3. Boukamp, J.G. and Vetr, M.G. (1994), "Design of eccentrically braced test frame with vertical shear link" Proceeding of the 2nd International Conference on Earthquake Resistant Construction and Design, Berlin, Germany, June.
  4. CSA S16 (2009), Design of steel structures, (Including Update No. 1 (2010), Update No. 2 (2010), Update No. 3 (2013)), Standard published by CSA group; Willowdale, ON, Canada.
  5. De Matteis, G., Formisano, A., Panico, S. and Mazzolani, F.M. (2008), "Numerical and experimental analysis of pure aluminum shear panels with welded stiffeners", Comput. Struct., 86(6), 545-555. https://doi.org/10.1016/j.compstruc.2007.05.027
  6. Engelhardt, M.D. and Popov, E.P. (1992), "Experimental performance of long links in eccentrically braced frames", J. Struct. Eng., 118(11), 3067-3088. https://doi.org/10.1061/(ASCE)0733-9445(1992)118:11(3067)
  7. Fehling, E., Pauli, W. and Bouwkamp, J.G. (1992), "Use of vertical shear Link in eccentrically braced frames", Proceedings of the 10th World Conference on Earthquake Engineering, Madrid, Spain, July.
  8. Hossain, Md.R., Ashraf, M. and Albermani, F. (2009), "Numerical evaluation of yielding shear panel device: A sustainable technique to minimize structural damages due to earthquakes", Universitas 21 International Graduate Research Conference, Melbourne-Brisbane, Australia, November-December, pp. 65-68.
  9. Hossain, Md.R., Ashraf, M. and Albermani, F. (2011), "Numerical modelling of yielding shear panel device for passive energy dissipation", Thin-Wall. Struct., 49(8), 1032-1044. https://doi.org/10.1016/j.tws.2011.03.003
  10. IBC (2012), International building code, International Code Council, Inc.; USA.
  11. Miranda, E. (1993), "Site dependent strength reduction factor", J. Struct. Eng., ASCE, 119(12), 3503-3519. https://doi.org/10.1061/(ASCE)0733-9445(1993)119:12(3503)
  12. Ozhendekci, D. and Ozhendekci, N. (2008), "Effects of the frame geometry on the weight and inelastic behavior of eccentrically braced chevron steel frames", J. Construct. Steel Res., 64(3), 326-343. https://doi.org/10.1016/j.jcsr.2007.07.009
  13. Priestly, M.J.N., Seible, F. and Clavi, G.M. (1996), Seismic Design and Retrofit of Bridges, John Wiley and Sons, New York, NY, USA.
  14. Rai, D.C., Annam, P.K. and Pradhan, T. (2013), "Seismic testing of steel braced frames with aluminum shear yielding dampers", Eng. Struct., 46, 737-747. https://doi.org/10.1016/j.engstruct.2012.08.027
  15. Saedi Daryan, A., Bahrampoor, H., Ziaei, M., Golafshar, A. and Assareh M.A. (2008), "Seismic behavior of vertical shear link made of easy-going steel", Am. J. Eng. Appl. Sci., 1(4), 368-377. https://doi.org/10.3844/ajeassp.2008.368.377
  16. Williams, M.S. and Albermani, F. (2003), "Monotonic and cyclic tests on shear diaphragm dissipators for steel frames", Civil Eng. Res. Bulletin, No. 23, pp. 1-34.
  17. Zahrai, S.M. and Bruneau, M. (1999), "Cyclic testing of ductile end diaphragm for slab-on-girder steel bridges", J. Struct. Eng., ASCE, 125(9), 987-996 https://doi.org/10.1061/(ASCE)0733-9445(1999)125:9(987)
  18. Zahrai, S.M. and Moslehi Tabar, A. (2013), "Analytical study on cyclic behavior of chevron braced frames with shear panel system considering post-yield deformation", Can. J. Civil Eng., 40(7), 633-643. https://doi.org/10.1139/cjce-2012-0430

Cited by

  1. Cyclic Performance of an Elliptical-Shaped Damper with Shear Diaphragms in Chevron Braced Steel Frames 2018, https://doi.org/10.1080/13632469.2016.1277436
  2. Proposed Relationship for Proper Shear Strength of Elliptical Damper Based on Its Geometrical Parameters vol.18, pp.3, 2018, https://doi.org/10.1007/s13296-018-0032-z
  3. Numerical Study on the Impact of Out-of-Plane Eccentricity on Lateral Behavior of Concentrically Braced Frames pp.2093-6311, 2018, https://doi.org/10.1007/s13296-018-0119-6
  4. Cyclic testing of innovative two-level control system: Knee brace & vertical link in series in chevron braced steel frames vol.64, pp.3, 2017, https://doi.org/10.12989/sem.2017.64.3.301
  5. Computational investigation of the comparative analysis of cylindrical barns subjected to earthquake vol.28, pp.4, 2015, https://doi.org/10.12989/scs.2018.28.4.439
  6. Technical-Economical Comparison Between Vertical Link Beam and Knee Brace Systems in Mid-Rise Steel Buildings vol.9, pp.1, 2015, https://doi.org/10.2478/jaes-2019-0015
  7. Numerical study on force transfer mechanism in through gusset plates of SCBFs with HSS columns & beams vol.31, pp.6, 2015, https://doi.org/10.12989/scs.2019.31.6.541
  8. Cyclic Performance and Mechanical Characteristics of the Oval-shaped Damper vol.23, pp.11, 2015, https://doi.org/10.1007/s12205-019-1382-6
  9. Development and testing of cored moment resisting stub column dampers vol.34, pp.1, 2015, https://doi.org/10.12989/scs.2020.34.1.107
  10. Computational analysis of three dimensional steel frame structures through different stiffening members vol.35, pp.2, 2015, https://doi.org/10.12989/scs.2020.35.2.187
  11. Experimental and numerical evaluation of innovated T-resisting frames with haunched horizontal plate girders vol.23, pp.8, 2020, https://doi.org/10.1177/1369433219898082
  12. Seismic retrofit of steel buildings using external resistant RC walls and friction dampers vol.76, pp.6, 2020, https://doi.org/10.12989/sem.2020.76.6.823
  13. An innovative C-shaped yielding metallic dampers for steel structures vol.34, pp.None, 2021, https://doi.org/10.1016/j.istruc.2021.08.069
  14. An Innovative Steel Damper with a Flexural and Shear-Flexural Mechanism to Enhance the CBF System Behavior: An Experimental and Numerical Study vol.11, pp.23, 2015, https://doi.org/10.3390/app112311454