Proposing a New Bracing System with Bending Yielding Circular Plates under Cyclic Loading

Document Type : Research Article


K.N. Toosi University of Technology, Tehran, Iran.


The most prevalent way to deal with lateral loads in steel structures is using common bracing systems like concentric bracing systems. One of the major drawbacks of this system is the buckling when the compression force exceeds the elastic buckling strength, thereby being unstable before reaching the yield limit. In other words, the behavior of these braces is asymmetric under tension/compression forces leading to reduce the ability of the system to absorption of the most exciting energy and can lead to additional structural and non-structural damages due to the change in the direction of the inertial forces. To tackle these problems and to improve the performance of bracing systems, in this work for the first time, a new bracing system called a fan bracing system has been introduced. Fan brace enhances the ductility and energy absorption of the system by removing harmful buckling effects byreplacing axial deformations with flexural ones, which tends to make the system softer and thus increase the natural vibration period of the structure and reduce the earthquake shear force. In this study, the proposed brace is studied using numerical modeling under affecting cyclic excitation based on the loading protocol of ATC-24. The advantages of this system include the symmetrical behavior even in the large cyclic deformations, as well as high energy absorption and lighter weight in comparison with the buckling-restrained brace (BRB).


Main Subjects

 [1]    J.M. Kelly, R. Skinner, A. Heine, Mechanisms of energy absorption in special devices for use in earthquake resistant structures, Bulletin of the New Zealand Society for Earthquake Engineering, 5(3) (1972) 63-88.
[2]    P. Boardman, B. Wood, A. Carr, Union house, Bulletin of the New Zealand Society for Earthquake Engineering, 16(2) (1983) 83-97.
[3]    E. Martinez-Romero, Experiences on the use of supplementary energy dissipators on building structures, Earthquake spectra, 9(3) (1993) 581-625.
[4]    C.L. Perry, E.A. Fierro, H. Sedarat, R.E. Scholl, Seismic upgrade in San Francisco using energy dissipation devices, Earthquake Spectra, 9(3) (1993) 559-579.
[5]    K.-C. Tsai, H.-W. Chen, C.-P. Hong, Y.-F. Su, Design of steel triangular plate energy absorbers for seismic-resistant construction, Earthquake spectra, 9(3) (1993) 505-528.
[6]    S. Beheshti-Aval, H. Mahbanouei, F. Zareian, A hybrid friction-yielding damper to equip concentrically braced steel frames, International Journal of Steel Structures, 13(4) (2013) 577-587.
[7]    M. Gray, C. Christopoulos, J. Packer, Cast steel yielding fuse for concentrically braced frames, in:  Proceedings of the 9th US national and 10th Canadian conference on earthquake engineering, Earthquake Engineering Research Institute and the Canadian Association for …, 2010.
[8]    B. Payandehjoo, S. Sabouri-Ghomi, P. Ebadi, Seismic behavior of X-shaped drawer bracing system (DBS) and X-braced frames with heavy central core, Journal of Earthquake and Tsunami, 10(04) (2016) 1650004.
[9]    F. Taiyari, F.M. Mazzolani, S. Bagheri, A proposal for energy dissipative braces with U-shaped steel strips, Journal of Constructional Steel Research, 154 (2019) 110-122.
[10]   R. Aghlara, M.M. Tahir, A.B. Adnan, Experimental study of Pipe-Fuse Damper for passive energy dissipation in structures, Journal of Constructional Steel Research, 148 (2018) 351-360.
[11]   T. Yoshino, Y. Karino, Experimental study on shear wall with braces: Part 2, in:  Summaries of technical papers of annual meeting, Architectural Institute of Japan, 1971, pp. 403-404.
[12]   P. Clark, Design procedures for buildings incorporating hysteretic damping devices, in:  International Post-SMiRT Conference Seminar on Seismic Isolation, Korea, 1999.
[13]   W. Lopez, Design of unbonded braced frames, in:  Proceedings, 2001, pp. 23-31
[14]   I.D. Aiken, S.A. Mahin, P. Uriz, Large-scale testing of buckling-restrained braced frames, in:  Japan Passive Control Symposium, 2002.
[15]   G.R. Kumar, S.S. Kumar, V. Kalyanaraman, Behaviour of frames with non-buckling bracings under earthquake loading, Journal of constructional steel research, 63(2) (2007) 254-262.
[16]   M. Shemshadian, S. Razavi, S. Mirghaderi, A. Hosseini, M. Khan Mohammadi, The advantages of reducing the length of yielding segment in seismic performance of buckling restrained braced frames, in:  Sixth International Conference of Seismology and Earthquake Engineering, 2011.
[17]   A. Jalaeefar, B. Asgarian, A simple hybrid damping device with energy‐dissipating and re‐centering characteristics for special structures, The structural design of tall and special buildings, 23(7) (2014) 483-499.
[18]   Abaqus, Abaqus documentation, Version, 6 (2014) 1-5.
[19]   B. Payandehjoo, An important of seismic performance of yielding damping damped braced core, PhD Dissertation, K. N. Toosi University of Technology, 2015(in Persian).
[20]   A. Council, Guidelines for cyclic seismic testing of component of steel structures, Redwood City, CA: ATC-24, (1992).
[21]   K.J. Rasmussen, J. Rondal, Strength curves for metal columns, Journal of Structural Engineering, 123(6) (1997) 721-728.
[22]   J. Gozzi, Plastic behaviour of steel: Experimental investigation and modelling, Luleå tekniska universitet, 2004.
[23]   P. Arasaratnam, K. Sivakumaran, M. Tait, True stress-true strain models for structural steel elements, International Scholarly Research Notices, 2011 (2011).
[24]   J. Pereira, A. De Jesus, J. Xavier, A. Fernandes, Ultra low-cycle fatigue behaviour of a structural steel, Engineering Structures, 60 (2014) 214-222.
[25]   A.S.o.C. Engineers, Minimum design loads and associated criteria for buildings and other structures, in, American Society of Civil Engineers, 2016.
[26]   S. Ghayoumi, Seismic Characteristics determination of Fan Bracing System, Master thesis, K. N. Toosi University of Technology, 2018(in Persian).
[27]   M. Mirtaheri, A. Gheidi, A.P. Zandi, P. Alanjari, H.R. Samani, Experimental optimization studies on steel core lengths in buckling restrained braces, Journal of constructional steel research, 67(8) (2011) 1244-1253.
[28]   B.S.S. Council, NEHRP recommended provisions for seismic regulations for new buildings and other structures (FEMA 450), Washington, DC, (2003).
[29]   A.K. Chopra, Dynamics of structures. theory and applications to, Earthquake Engineering,  (2001)