Steel and Composite Structures

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Effect of link length in retrofitted RC frames with Y eccentrically braced frame

  • INCE, Gulhan (Department of Civil Engineering, Architectural and Engineering Faculty, Burdur Mehmet Akif Ersoy University)
  • Received : 2020.11.20
  • Accepted : 2022.05.17
  • Published : 2022.06.10
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Abstract

Many existing reinforced concrete (RC) structures need to be strengthening for reason such as poor construction quality, low ductility or designing without considering seismic effects. One of the strengthening methods is strengthening technique with eccentrically braced frames (EBFs). The characteristic element of these systems is the link element and its length is very important in terms of seismic behavior. The link element of Y shaped EBF systems (YEBFs) is designed as a short shear element. Different limits are suggested in the literature for the link length. This study to aim experimentally investigate the effect of the link length for the suggested limits on the behavior of the RC frame system and efficiency of strengthening technique. For this purpose, a total of 5 single story, single span RC frame specimens were produced. The design of the RC frames was made considering seismic design deficiencies. Four of the produced specimens were strengthened and one of them remained as bare specimen. The steel YEBFs were used in strengthening the RC frame and the link was designed as a shear element that have different length with respect to suggested limits in literature. The length of links was determined as 50mm, 100mm, 150mm and 200mm. All of the specimens were tested under cyclic loads. The obtained results show that the strengthening technique improved the energy consumption and lateral load bearing capacities of the bare RC specimen. Moreover, it is concluded that the specimens YB-2 and YB-3 showed better performance than the other specimens, especially in energy consumption and ductility.

Keywords

Acknowledgement

This study was supported with BAP project 0174-NAP-13. Thanks to the Scientific Research Project Coordination of Burdur Mehmet Akif Ersoy University.

References

  1. Al-Dwaik, M. and Armouti, N.S. (2013), "Analytical case study of seismic performance of retrofit strategies for reinforced concrete frames: steel bracing with shear links versus column jacketing", Jordan J. Civil Eng., 7 (1), 26-43.
  2. ANSI/AISC 341-16 (2016), Seismic Provision for Structure Steel Buildings, American Institute of Steel Construction, Chicago, Illinois, US.
  3. Binici B. (2010), Betonarme Cercevelerin Yapisal Celik Elemanlarla Guclendirilmesi icin Tasarim Metotlari Gelistirilmesi, 106M493, TUBITAK.
  4. Bosco, M., Marino, E.M. and Rossi, P.P. (2015), "Modelling of steel link beams of short, intermediate or long length", Eng. Struct., 84, 406-418. https://doi.org/10.1016/j.engstruct.2014.12.003.
  5. Bouwkamp, J., Vetr, M.G. and Ghamari, A. (2016), "An analytical model for inelastic cyclic response of eccentrically braced frame with vertical shear link (V-EBF)", Case Studies Struct. Eng., 6, 31-44. https://doi.org/10.1016/j.csse.2016.05.002.
  6. Caprili, S., Mussini, N. and Salvatore, W. (2018), "Experimental and numerical assessment of EBF structures with shear links", Steel Compos. Struct, 28(2), 123-138. http://dx.doi.org/10.12989/scs.2018.28.2.123
  7. Dicleli, M. and Mehta, A. (2008), "Seismic performance of a special type of single-story eccentrically braced steel frame", Adv. Struct. Eng., 11(1), 35-51. https://doi.org/10.1260%2F136943308784069450. https://doi.org/10.1260%2F136943308784069450
  8. Dicleli, M. and Mehta, A. (2009a), "Seismic retrofitting of chevron-braced steel frames based on preventing buckling instability of braces", Int. J. Struct, Stab. Dyn., 9(2), 333-356. https://doi.org/10.1142/S0219455409003053
  9. Dicleli, M. and Mehta, A., (2009b), "Seismic performance of eccentrically braced frame with vertical link", ICOSSAR 2009 - 10th International Conference on Structural Safety and Reliability, 1-8, Osaka, Japan, September.
  10. Durucan, C. and Dicleli, M. (2010), "Analytical study on seismic retrofitting of reinforced concrete buildings using steel braces with shear link", Eng. Struct., 32(10), 2995-3010. https://doi.org/10.1016/j.engstruct.2010.05.019
  11. Eurocode 8, EN 1998-1-1 (2005), Design of Structures for Earthquake Resistance -Part 1: General Rules, Seismic Action Sand Rules for Buildings. CEN, Bruxelles.
  12. Ghadami, A., Pourmoosavi, Gh. and Ghamari, A. (2021), "Seismic design of elements outside of the short low-yield-point steel shear links", J. Construct. Steel Res., 178. https://doi.org/10.1016/j.jcsr.2020.106489.
  13. Ghobarah, A. and Elfath, H.A. (2001), "Rehabilitation of a reinforced concrete frame using eccentric steel bracing", Eng. Struct., 23(7), 745-755. https://doi.org/10.1016/S0141-0296(00)00100-0.
  14. Hamedi, F., Rezaeian, A.R. and Taherkhani, S. (2009), "Optimal design of eccentrically braced frames with vertical link (VEBFs) in order to maximize energy dissipation", Behavior of Steel Structures in Seismic Areas Chapter 6, STESSA, Taylor and Francis Group.
  15. Hasan, Q.F., Tekeli, H. and Demir, F. (2016), "NSM Rebar and CFRP laminate strengthening for RC columns subjected to cyclic loading", Construct. Building Materials, 119, 21-30. https://doi.org/10.1016/j.conbuildmat.2016.04.120.
  16. Ince, G., Ince, H.H. and Ocal, C. (2015a), "Seismic behavior of RC frames retrofitted by eccentrically braced frames with vertical link", Int. J. Adv. Mech. Civil Eng., 2(4),75-78.
  17. Ince, G., Tekeli, H., Ince, H.H., Ocal, C., Mercan, K. and Ulutas, H. (2015b), "Reinforcement of RC Frames with Eccentrically Braced Vertical Links", International Burdur Earthquake& Environment Symposium (IBEES2015), Mehmet Akif Ersoy University, Burdur/Turkey
  18. Jouybari, Y.M., Mahmoudi, Y. and Maghsodian, S. (2012), "Assessment of the seismic behavior of eccentrically braced frame with vertical and horizontal link", Amer. J. Scientific Res., 78, 5-11.
  19. Kaplan, H., Yilmaz, S., Cetinkaya, N. and Atimtay, E. (2011), "Seismic strengthening of RC structures with exterior shear walls", Sadhana, 36(1), 17. https://doi.org/10.1007/s12046-011- 0002-z.
  20. Karalis, A.A., Stylianidis, K.C. and Salonikios, T.N. (2010), "Experimental investigation of old R/C frames strengthened against earthquakes by high dissipation steel link elements", Urban Habitat Constructions Under Catastrophic Events, 877-882, Naples, Italy.
  21. Kucukgoncu, H. and Altun, F. (2020), "The seismic behaviour of RC exterior shear walls used for strengthening of intact and damaged frames", Bull. Earthquake Eng., 18, 3683-3709. https://doi.org/10.1007/s10518-020-00839-7.
  22. Li, T., Su, M. and Sui, Y. (2020), "Spatial substructure hybrid simulation tests of high-strength steel composite Y-eccentrically braced frames", Steel Compos. Struct., 34(5), 715-732. http://dx.doi.org/10.12989/scs.2020.34.5.715.
  23. Lian, M., Li, S. and Lei, X. (2021), "Seismic story shear distribution based on inelastic state of eccentrically braced frame with vertical link composite high strength steel", Int. J. Steel Struct., 21(4), 1260-1279. https://doi.org/10.1007/s13296-021-00510-0.
  24. Lian, M., Su, M. and Guo, Y. (2017), "Experimental performance of Y-shaped eccentrically braced frames fabricated with high strength steel", Steel Compos. Struct., 24(4), 441-453. http://dx.doi.org/10.12989/scs.2017.24.4.441.
  25. Maheri, M.R. and Hadjipour, A. (2003), "Experimental investigation and design of steel brace connection to RC frame", Eng. Struct., 25(13), 1707-1714. https://doi.org/10.1016/S0141-0296(03)00162-7.
  26. Mazzolani, F.M. (2008), "Innovative metal systems for seismic upgrading of RC structures", J. Construct. Steel Res., 64, 882- 895. https://doi.org/10.1016/j.jcsr.2007.12.017.
  27. Montuori, R., Nastri, E. and Piluso, V. (2014), "Theory of plastic mechanism control for eccentrically braced frames with inverted Y-scheme", J. Construct. Steel Res., 92, 122-135. https://doi.org/10.1016/j.jcsr.2013.10.009.
  28. Ozcelik, R. Binici, B. and Kurc O. (2012) "Pseudo dynamic testing of an RC frame retrofitted with chevron braces", J. Earthq. Eng., 16, 515-539. https://doi.org/10.1080/13632469.2011.653297.
  29. Ozkilic, Y.O., Zeybek, O. and Topkaya, C. (2022), "Stability of laterally unsupported shear links in eccentrically braced frames", Earthq. Eng. Struct. Dyn., 51, 832-852. https://doi.org/10.1002/eqe.3593.
  30. Ramadan, T. and Ghobarah, A. (1995), "Analytical model for shear-link behavior", J. Struct. Eng., 121(11), 1574-1580. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:11(1574)
  31. Roudsari, M.T., Entezari, A., Hadidi, M.H. and Gandomian, O. (2017), "Experimental assessment of retrofitted RC frames with different steel braces", Structures, 11, 206-217. https://doi.org/10.1016/j.istruc.2017.06.003.
  32. Saravanan, M., Goswami, R. and Palani, G.S. (2018), "Replaceable fuses in earthquake resistant steel structures: A review", Int. J. Steel Struct., 18(3), 868-879. https://doi.org/10.1007/s13296-018-035-9.
  33. Shayanfar, M., Rezaeian, A. and Taherkhani, S. (2008), "Assessment of the seismic behavior of eccentrically braced frame with double vertical link (DV-EBF)", Proceedings of the 14th World Conference on Earthquake Engineering, Bejing, China, October.
  34. Shayanfar, M.A., Barkhordari, M.A. and Rezaeian, A.R. (2011), "Experimental study of cyclic behavior of composite vertical shear link in eccentrically braced frames", Steel Compos. Struct., 12(1), 13-29. http://dx.doi.org/10.12989/scs.2011.12.1.013.
  35. Tekeli, H. and Aydin, A. (2017), "An experimental study of the seismic behavior of infilled RC frames with opening", Scientia Iranica. Transaction A, Civil Eng., 24(5), 2271-2282. http://doi.org/10.24200/sci.2017.4150.
  36. Vetr, M.G. (1998), Seismic Behavior, Analysis and Design of Eccentrically Braced Frames with Vertical Shear Links, Ph.D. Dissertation, University of technology Darmstadt, Germany.
  37. Vetr, M.G. and Ghamari, A. (2019) "Experimentally and analytically study on eccentrically braced frame with vertical shear links", Struct. Des. Tall Spec. 28(5), e1587. https://doi.org/10.1002/tal.1587.
  38. Vetr, M.G., Ghamari, A. and Bouwkamp, J. (2017), "Investigating the nonlinear behavior of eccentrically braced frame with vertical shear links (V-EBF)", J. Build. Eng., 10, 47-59. http://dx.doi.org/10.1016/j.jobe.2017.02.002.
  39. Wang, F., Sua, M., Hong, M., Guo, Y. and Li, S. (2016), "Cyclic Behavior of Y-shaped eccentrically braced frames fabricated with high-strength steel composite", J. Construct. Steel Res., 120, 176-187. https://doi.org/10.1016/j.jcsr.2016.01.007.
  40. Zahrai, S.M. (2015), "Cyclic testing of chevron braced steel frames with IPE shear panels", Steel Compos. Struct., 19(5), 1167-1184. https://dx.doi.org/10.12989/scs.2015.19.5.000.
  41. Zhuang, L., Wang, J., Nie, X. and Wu, Z. (2022), "Experimental study on seismic behaviour of eccentrically braced composite frame with vertical LYP steel shear link", Eng. Struct., 255. https://doi.org/10.1016/j.engstruct.2022.113957.