Buckling Response and Elastic Stiffness of Butterfly Dampers

Document Type : Research Article

Authors

Structural Engineering Research Center, International Institute of Earthquake Engineering and Seismology (IIEES)

Abstract

Butterfly dampers dissipate energy through the flexural, shear, or axial response of
the strips when the device is subjected to inelastic cyclic deformation. The buckling
response, elastic stiffness, and cyclic performance of non-uniform steel butterfly
dampers have been studied in this paper. Validated material and geometric nonlinear
finite element models in the ABAQUS has been used to perform a comprehensive
parametric study on a wide range of geometrical parameters to evaluate the
response of non-compact butterfly dampers. The results showed that although the
low-cycle-fatigue response of butterfly dampers can be improved by altering the side
edge shapes, the buckling capacity and elastic stiffness of non-uniform strips would
decrease in comparison with uniform ones. Hence several analytical equations were
provided to quantitative prediction of the buckling capacity and elastic stiffness of
butterfly dampers.

Keywords


[1]      Farzampour, A. and Eatherton, M. (2017) Lateral torsional buckling of butterfly-shaped shear links. Proc. Annu. Stab. Conf. Struct. Stab. Res. Counc.
[2]      Lee, C.H., Ju, Y.K., Min, J.K., Lho, S.H., and Kim, S.D. (2015) Non-uniform steel strip dampers subjected to cyclic loadings. Engineering Structures. 99, 192–204.
[3]      Ghabraie, K., Chan, R., Huang, X., and Xie, Y.M. (2010) Shape optimization of metallic yielding devices for passive mitigation of seismic energy. Engineering Structures, 32(8), 2258–2267.
[4]      Xian, M., Borchers, E., Pena, A., Krawinkler, H., Billington, S.L., and Deierlein, G.G. (2010) Design and Behavior of Steel Shear Plates with Openings as Energy Dissipating Department of Civil and Environmental Engineering Design and Behavior of Steel Shear Plates with Openings as Energy Dissipating Fuses. By Xiang Ma , Eric Borchers , Alex Pena , H. John A. Blume Earthquake Engineering Center (Report No. 173).
[5]      Siar Mahmood Shah, A. and Moradi, S. (2020) Cyclic response sensitivity of energy dissipating steel plate fuses. Structures, 23, 799–811.
[6]      Deng, K., Pan, P., Sun, J., Liu, J., and Xue, Y. (2014) Shape optimization design of steel shear panel dampers. Journal of Constructional Steel Research. 99, 187–193.
[7]      Kiani, B.K., Hosseini, B., and Torabian, S. (2020) Optimization of slit dampers to improve energy dissipation capacity and low-cycle-fatigue performance. Engineering Structures. 214, 110609.
[8]      Kiani, B.K, Torabian, S., Mirghaderi, S.R. (2015) Local seismic stability of flanged cruciform sections (FCSs). Engineering Structures, 94, 04.003.
 [9]     Liu, Y. and Shimoda, M. (2013) Shape optimization of shear panel damper for improving the deformation ability under cyclic loading. Structural and Multidisciplinary Optimization, 48(2), 427–435.
[10]    Zhang, C., Zhang, Z., and Shi, J. (2012) Development of high deformation capacity low yield strength steel shear panel damper. Journal of Constructional Steel Research, 75, 116–130.
[11]    FEMA (2007) Interim Protocols for Determining Seismic Performance Characteristics of Structural and Nonstructural Components. Federal Emergency Management Agency,FEMA 461.
[12]    Farzampour, A. and Eatherton, M.R. (2019) Yielding and lateral torsional buckling limit states for butterfly-shaped shear links. Engineering Structures, 180, 442–451.
[13]    Plaut, R.H. and Eatherton, M.R. (2017) Lateral-torsional buckling of butterfly-shaped beams with rectangular cross section. Engineering Structures, 136 210–218.
[14]    Ma, X., Borchers, E., Pena, A., Krawinkler, H., Billington, S., and Deierlein, G.G. (2010) Design and Behavior of Steel Shear Plates with Openings as Energy-Dissipating Fuses. Internal Report, John A. Blume Earthquake Engineering Center, Stanford University.
[15]    Hedayat, A.A. (2015) Prediction of the force displacement capacity boundary of an unbuckled steel slit damper. Journal of Constructional Steel Research, 114, 30–50.
[16]    Trahair, N.S. (2003) Guide to Stability Design Criteria for Metal Structures (4th edition). John Wiley & Sons, .
[17]    Alinia, M.M. and Dastfan, M. (2006) Behaviour of thin steel plate shear walls regarding frame members. Journal of Constructional Steel Research, 62(7), 730–738.
[18]    Xian, M., Krawinkler, H., and Deierlein, G.G. (2010) Seismic Design and Behavior of Self-Centering Braced Frame with Controlled Rocking and Energy–Dissipating Fuses. John A. Blume Earthquake Engineering Center. (August), 438.
[19]    Eatherton, M.R. and Hajjar, J.F. (2014) Hybrid simulation testing of a self-centering rocking steel braced frame system. Earthquake Engineering & Structural Dynamics, 43(11), 1725–1742.
[20]    Oh, S.H., Kim, Y.J., and Ryu, H.S. (2009) Seismic performance of steel structures with slit dampers. Engineering Structures, 31(9), 1997–2008.
[21]    Lee, J. and Kim, J. (2017) Development of box-shaped steel slit dampers for seismic retrofit of building structures. Engineering Structures, 150, 934–946.