- Volume 12 Issue 5
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The effect of mainshock-aftershock on the residual displacement of buildings equipped with cylindrical frictional damper
- Mirtaheri, Masoud (Civil Engineering Faculty, K. N. Toosi University of Technology) ;
- Amini, Mehrshad (Civil Engineering Faculty, K. N. Toosi University of Technology) ;
- Rad, Moosa Doosti (Civil Engineering Faculty, K. N. Toosi University of Technology)
- Received : 2016.11.19
- Accepted : 2017.04.25
- Published : 2017.05.25
Recently, Friction dampers become popular due to the desirable performance in the energy dissipation of lateral loads. A lot of research which has been conducted on these dampers results in developing friction dampers with low sensitivity to the number of cycles and temperature increases. Friction dampers impose high residual drifts to the buildings because of low post-yield stiffness of the damper which results from increasing lateral displacement and period of buildings. This issue can be more critical under strong aftershocks which results in increasing of structural damages. In this paper, in addition to the assessment of aftershock on steel buildings equipped with friction dampers, methods for controlling residual drifts and decreasing the costs of retrofitting are investigated. Utilizing rigid connections as a lateral dual system and activating lateral stiffness of gravity columns by adding elastic braces are as an example of effective methods investigated in this research. The results of nonlinear time history analyses on the low to medium rise steel frames equipped with friction dampers illustrate a rise in residual drifts as the result of aftershocks. In addition, the results show that different slip loads of friction damper can affect the residual drifts. Furthermore, elastic stories in comparison to rigid connections can reduce residual drifts of buildings in an effective fashion, when most slip loads of friction dampers are considered.
- AISC360 (2005), American Institute of Steel Construction. Seismic provisions for structural steel buildings, Chicago.
- Amiri, J.V., Navayinia, B. and Navaei, S. (2011), "Evaluation of performance of eccentric braced frame with friction damper", Struct. Eng. Mech., 39(5), 717-732. https://doi.org/10.12989/sem.2011.39.5.717
- Boston, M. and Richards, P.W. (2012), "Seismic response of BRBFs coupled with heavy gravity columns", Proceedings of the 15th World Conference on Earthquake Engineering, Lisbon, Portugal.
- Chou, C.C. and Chen, Y.C. (2012), "Development and seismic performance of steel dual-core self-centering braces", 15th World Conference on Earthquake Engineering, Lisboan, Portugal.
- Christopoulos, C. and Pampanin, S. (2004), "Towards performance-based design of MDOF structures with explicit consideration of residual deformations", ISET J. Earthq. Technol., 41(1), 53-57.
- Christopoulos, C., Tremblay, R., Kim, H.J. and Lacerte, M. (2008), "Self-centering energy dissipative bracing system for the seismic resistance of structures", J. Struct. Eng., 134(1), 96-107. https://doi.org/10.1061/(ASCE)0733-9445(2008)134:1(96)
- Erochko, J., Christopoulos, C., Tremblay, R. and Choi, H. (2011). "Residual drift response of SMRFs and BRB frames in steel buildings designed according to ASCE 7-05", J. Struct. Eng., ASCE, 137(5), 589-599. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000296
- Fahnestock, L.A., Sause, R. and Ricles, J.M. (2007), "Seismic response and performance of buckling-restrained braced frames", J. Struct. Eng., 133(9), 1195-1204. https://doi.org/10.1061/(ASCE)0733-9445(2007)133:9(1195)
- Garcia, J.R. (2010), "On the influence of strong-ground motion duration on residual displacement demands", Earthq. Struct., 1(4), 327-344. https://doi.org/10.12989/eas.2010.1.4.327
- Kiggins, S. and Uang, C.M. (2006), "Reducing residual drift of buckling-restrained braced frames as a dual system", J. Eng. Struct., 28(11), 1525-1532. https://doi.org/10.1016/j.engstruct.2005.10.023
- Marko, J. (2006), "Influence of damping systems on building structures subject to seismic effects", Ph.D. Dissertation, Queensland University of Technology, Australia.
- Mazzoni, S., McKenna, F., Scott, M. and Fenves, G. (2006), "OpenSees command language Manual", Pacific Earthquake Engineering Research Center (PEER), Berkeley, CA.
- McKenna, F., Fenves, G.L., Scott, M.H. and Jeremic, B. (2000), "Open system for earthquake engineering simulation (OpenSees)", Pacific Earthquake Engineering Research Center, University of California, Berkeley, CA, 2000.
- Mirtaheri, M., Zandi, A.P., Samadi, S.S. and Samani, H.R. (2011), "Numerical and experimental study of hysteretic behavior of cylindrical friction dampers", J. Eng. Struct., 33(12), 3647-3656. https://doi.org/10.1016/j.engstruct.2011.07.029
- Monir, H.S. and Zeynali, K. (2013), "A modified friction damper for diagonal bracing of structures", J. Constr. Steel Res., 87, 17-30. https://doi.org/10.1016/j.jcsr.2013.04.004
- Pall, A.S. and Marsh, C. (1982), "Response of friction damped braced frames", J. Struct. Eng., ASCE, 108(9), 1313-1323.
- Petel, C.C. and Jangid, R.S. (2011), "Dynamic response of adjacent structures connected by friction damper", Earthq. Struct., 2(2), 149-169. https://doi.org/10.12989/eas.2011.2.2.149
- Ricles, J.M., Sause, R., Garlock, M.M. and Zhao, C. (2001), "Posttensioned seismic resistant connections for steel frames", J. Struct. Eng., 127(2), 113-121. https://doi.org/10.1061/(ASCE)0733-9445(2001)127:2(113)
- Samani, H.R., Mirtaheri, M. and Zandi, A.P. (2014), "The effects of dynamic loading on hysteretic behavior of frictional dampers", Hindawi Publishing Corporation, Shock and Vibration, 181534, 9 pages.
- UBC (2010), Uniform Building Code, International Council of Building Officials, USA, CA.