DOI QR코드

DOI QR Code

A proposal for improving the behavior of CBF braces using an innovative flexural mechanism damper, an experimental and numerical study

  • Ghamari, Ali (Department of Civil Engineering, Ilam Branch, Islamic Azad university) ;
  • Jeong, Seong‐Hoon (Department of Architectural Engineering, Inha University)
  • 투고 : 2022.04.22
  • 심사 : 2022.11.01
  • 발행 : 2022.11.10

초록

Despite the considerable lateral stiffness and strength of the Concentrically Braced Frame (CBF), it suffers from low ductility and low seismic dissipating energy capacity. The buckling of the diagonal members of the CBF systems under cyclic loading ended up to the shortcoming against seismic loading. Comprehensive researches have been performing to achieve helpful approaches to prevent the buckling of the diagonal member. Among the recommended ideas, metallic damper revealed a better success than other ideas to enhance the behavior of CBFs. While metallic dampers improve the behavior of the CBF system, they increase constructional costs. Therefore, in this paper, a new steel damper with flexural mechanism is proposed, which is investigated experimentally and numerically. Also, a parametrical revision was carried out to evaluate the effect of thickness, slenderness ratio, angle of the main plate, and height of the main plates on the proposed damper. For the parametrical study, 45 finite element models were analyzed and considered. Experimental results, as well as the numerical results, indicated that the proposed damper enjoys a stable hysteresis loop without any degradation up to a high rotation equal to around 31% that is significantly considerable. Moreover, it showed a suitable performance in case of ductility and energy dissipating. Besides, the necessary formulas to design the damper, the required relations were proposed to design the elements outside the damper to ensure the damper acts as a ductile fuse.

키워드

과제정보

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education(NRF-2020R1F1A1075644).

참고문헌

  1. AISC 341-16. (2016), Seismic Provisions for Structural Steel Buildings, American Institute of Steel Constriction: Chicago, IL, USA.
  2. ATC-24 Applied Technology Council (1992), Guidelines for Cyclic Seismic Testing of Components of Steel Structures, ATC24 ATC, Redwood, CA, USA.
  3. Bouwkamp, J., Vetr, M.G. 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.
  4. Bruneau, M., Uang C.M. and Whittaker, A. (1998), Ductile Design of Steel Structures, McGraw-Hill, Boston.
  5. El-Sayed, T. and El-Mongy, H. (2018), "Application of variational iteration method to free vibration analysis of a tapered beam mounted on two-degree of freedom subsystems", Appl. Mathem. Modelling, 58, 349-364. https://doi.org/10.1016/j.apm.2018.02.005.
  6. Fan, S., Ding, Z. Du, L. Shang, C. and Liu, M. (2016), "Nonlinear finite element modeling of two-stage energy dissipation device with low-yield-point steel", Int. J. Steel Struct., 16, 1107-1122. https://doi.org/10.1007/s13296-016-0029-4.
  7. Ghamari, A. Haeri, H, Khaloo, A. and Zhu, Z (2019), "Improving the hysteretic behavior of Concentrically Braced Frame (CBF) by a proposed shear damper", Steel Compos. Struct., 30(4), 383-392. https://doi.org/10.12989/SCS.2019.30.4.383.
  8. Ghamari, A., Almasi, B., Kim, C.H., Jeong, S.H. and Hong, K.J. (2021b), "An innovative steel damper with a flexural and shear flexural mechanism to enhance the CBF system behavior: An experimental and numerical study", Appl. Sci., 11(23), 11454. https://doi.org/10.3390/app112311454.
  9. Ghamari, A., Kim, S.C. and Jeong, S. (2022a), "Development of an innovative metallic damper for concentrically braced frame systems based on experimental and analytical studies", Struct. Des. Tall Spec. Build., 31(8), e1927. https://doi.org/10.1002/tal.1927.
  10. Ghamari, A., Kim, Y. and Bae, J. (2021a), Utilizing an I-shaped shear link as a damper to improve the behaviour of a concentrically braced frame", J. Construct. Steel Res., 186(1), 106915, https://doi.org/10.1016/j.jcsr.2021.106915.
  11. Ghamari, A., Kim, Y. and Bae, J. (2022b), "An Innovative shear link as damper: an experimental and numerical study", Steel Compos. Struct., 42(4), 539-552. https://doi.org/10.12989/scs.2022.42.4.539.
  12. Han, Q. Jia, J. Xu, Z. Bai, Y. and Song, N. (2014), "Experimental evaluation of hysteretic behavior of rhombic steel plate dampers", Adv. Mech. Eng., 8(1). https://doi.org/10.1155/2014/185629.
  13. He, Z. and Chen Q. (2021), "Upgrading the seismic performance of underground structures by introducing lead-filled steel tube dampers", Tunnell. Underg. Space Technol., 108, 103727. https://doi.org/10.1016/j.tust.2020.103727.
  14. Hsu, H. and Halim, H. (2017), "Improving seismic performance of framed structures with steel curved dampers", Eng. Struct., 130, 99-111. https://doi.org/10.1016/j.engstruct.2016.09.063.
  15. Hsu, H.L. Juang J.L. and Chou, C.H. (2011), "Experimental evaluation on the seismic performance of steel Knee braced frame structures with energy dissipation mechanism", Steel Compos. Struct., 11(1), 77-91. https://doi.org/10.12989/scs.2011.11.1.077
  16. Lee, J. and Kim J. (2017), "Development of box-shaped steel slit dampers for seismic retrofit of building structures", Eng. Struct., 150, 934-946. https://doi.org/10.1016/j.engstruct.2017.07.082.
  17. Lian, M., and Su, M. (2018), "Seismic testing and numerical analysis of Y-shaped eccentrically braced frame made of highstrength steel", Struct. Des. Tall Spec. Build., 27(6), e1455. https://doi.org/10.1002/tal.1455.
  18. Lotfi Mahyari, S. Tajmir, H. Riahi, H. and Hashemi, M. (2019), "Investigating the analytical and experimental performance of a pure torsional yielding damper", J. Construct. Steel Res., 161, 385-399. https://doi.org/10.1016/j.jcsr.2019.07.010.
  19. Qia, F., Han, X. and Zhou, K., (2017), "Bracing configuration and seismic performance of reinforced concrete frame with brace", Struct. Des. Tall Spec. Build., 26(14), e1381. https://doi.org/10.1002/tal.1381.
  20. Richards, P.W. and Uang, C.M. (2005), "Effect of flange widththickness ratio on eccentrically braced frames link cyclic rotation capacity", J. Struct. Eng., 131(10), 1546-1552. https://doi.org/10.1061/(ASCE)0733-9445(2005)131:10(1546).
  21. Roeder, C.W. and Popov E.P. (1977), "Inelastic behavior of eccentrically braced steel frames under cyclic loadings", NASA STI/Recon Technical Report N 78, 20375.
  22. Safeer, M. and Sahoo, D. (2017), "Mitigation of seismic drift response of braced frames using short yielding-core BRBs", Steel Compos. Struct., 23(3), 285-302. https://doi.org/10.12989/scs.2017.23.3.285.
  23. Skalomenos, K., Whittall, T., Kurata, M. and Pickering, J. (2022), "Component testing and multi-level seismic design of steel braced frames with high post-yielding stiffness and two-phase yielding", Soil Dyn. Earthq. Eng., 157, 107248. https://doi.org/10.1016/j.soildyn.2022.107248.
  24. Taiyari, F. Mazzolani, F. and Bagheri, S. (2019), "A proposal for energy dissipative brace with U-shaped steel strips", J. Construct. Steel Res., 154, 110-122, https://doi.org/10.1016/j.jcsr.2018.11.031.
  25. Tsai, K., Chen, H., Hong, C. and Su, Y. (1993), "Design of steel triangular plate energy absorbers for seismic-resistant construction", Earthq. Spectra, 9(3), 505-528. https://doi.org/10.1193/1.1585727.
  26. Vetr, M.G. and Ghamari, A. (2019), "Experimentally and analytically study on eccentrically braced frame with vertical shear links", Struct. Des. Tall Spec. Build., 28(5), e1587. https://doi.org/10.1002/tal.1587.
  27. 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. https://doi.org/10.1016/j.jobe.2017.02.002 .
  28. Wang, Y.P. and Chien C.S.C. (2009), "A study on using pre-bent steel strips as seismic energy-dissipative devices", Earthq. Eng. Struct. Dyn. 38(8), 1009-1026. https://doi.org/10.1002/eqe.880.
  29. Xia, C. and Hanson R.D. (1992), "Influence of ADAS element parameters on building seismic response", J. Struct. Eng", 118(7), 1903-1918. https://doi.org/10.1061/(ASCE)0733- 9445(1992)118:7(1903).
  30. Zahrai., S.M. (2015), "Cyclic testing of chevron braced steel frames with IPE shear panels", Steel Compos. Struct., 19(5), 1167-1184. https://doi.org/10.12989/SCS.2015.19.5.1167.