Abstract
As the desire for high performance buildings increases, a number of solutions to enhance the dynamic response of structures have been explored and implemented. In recent years, base isolation has become a practical and effective strategy for earthquake resistant design. To this end, a number of isolation solutions are currently available. Among these, laminated lead rubber bearings and friction pendulum devices have been most widely used in the last 25 years. Recent studies have explored the possibility of employing flat or curved sliding-surface base isolators with variable friction coefficients. These new types of devices have been shown to be capable of performing theoretically better than traditional sliding isolators in light of their higher energy-absorption capacity. This paper provides insight into the mechanics of variable friction sliding isolators, exploring viable ways of dealing with these types of elements from a numerical point of view. A number of 2D non-linear time history analyses, in which the new elements are treated as non-linear translational spring elements, are conducted and the results are discussed in detail.
Similar content being viewed by others
References
Becker TC, Mahin SA (2012) Experimental and analytical study of the bi-directional behavior of the triple Friction Pendulum isolator. Earthq Eng Struct Dyn 41(3):355–373
Calvi GM, Spaziante V (2009) Reconstruction between temporary and definitive: the CASE project. Progett Sism 3:221–250 (English)
Calvi GM, Ceresa P, Bolognini D, Casarotti C, Auricchio F (2004) Effects of axial force variation in the seismic response of bridges isolated with friction pendulum systems. J Earthquake Eng 8(S1):187–224
Calvi GM, Pietra D, Moratti M (2010) Criteri per la progettazione di dispositivi di isolamento apendolo scorrevole. Progett Sism 03:7–30
Calvi PM, Moratti M, Calvi GM (2015) Seismic isolation devices based on sliding between surfaces with variable friction coefficient. Earthq Spectra (Submitted)
Casarotti C, Pavese A (2014) Statistical results of a wide experimental campaign on full scale curved surface sliders. In: Proceedings of the 2nd ECEE&S, Istanbul
Constantinou MC, Mokha A, Reinhorn AM (1990a) Teflon bearings in base isolation I: testing. J Struct Eng ASCE 116(2):438–454
Constantinou MC, Mokha A, Reinhorn AM (1990b) Teflon bearings in base isolation II: modeling. J Struct Eng ASCE 116(2):455–474
Fagà E (2013) A precast composite technology for seismic design of multi-storey buildings. Istituto Universitario di Studi Superiori di Pavia - IUSS
Fenz DM, Constantinou MC (2006) Behavior of the double concave Friction Pendulum bearing. Earthq Eng Struct Dyn 35(11):1403–1424
Fenz DM, Costantinou MC (2008) Development, implementation and verification of dynamic analysis models for multi-spherical sliding bearings. Technical report MCEER-08-0018, SUNY, Buffalo
Hall JF (2006) Problems encountered from the use (or misuse) of Rayleigh damping. Earthq Eng Struct Dyn 35(5):525–545
MATLAB and Statistics Toolbox Release (2012) The MathWorks, Inc., Natick, MA
Mokha A, Amin N, Constantinou MC, Zayas V (1991) Experimental study of friction pendulum isolation system. J Struct Eng ASCE 117(4):1201–1217
Mosqueda G, Whittaker AS, Fenves GL (2004) Characterization and modeling of friction pendulum bearings subjected to multiple components of excitation. J Struct Eng ASCE 130(3):433–442
Murnal P, Sinha R (2002) Earthquake resistant design of structures using the variable frequency pendulum isolator. J Struct Eng 128(7):870–880
Newmark NM, Rosenblueth E (1971) Fundamentals of earthquake engineering. Prentice Hall, Englewood Cliffs
Panchal V, Jangid R (2009) Seismic response of structures with variable friction pendulum system. J Earthq Eng 13:193–216
Pant DR, Wijeyewickrema AC, ElGawady MA (2013) Appropriate viscous damping for nonlinear time-history analysis of base-isolated reinforced concrete buildings. Earthq Eng Struct Dyn 42:2321–2339
Petrini L, Maggi C, Priestley MJN, Calvi GM (2008) Experimental verification of viscous damping modeling for inelastic time history analyses. J Earthq Eng 12(1):125–145
Priestley MJN, Calvi GM, Kowalsky MJ (2007) Displacement based seismic design of structures. IUSS Press, Pavia
Ryan KL, Chopra AK (2004) Estimating the seismic displacement of friction pendulum isolators based on nonlinear response history analysis. Earthq Eng Struct Dyn 33(3):359–373
Ryan KL, Polanco J (2008) Problems with Rayleigh damping in base-isolated buildings. J Struct Eng 134:1780–1784
Sarkisian M, Lee P, Hu L, Doo C, Zayas V, Constantinou MC, Bachman R (2012) Property verification of triple pendulum seismic isolation bearings. In: Proceedings of the 20th analysis and computation specialty track (2012 ASCE structures congress), Chicago, pp 29–31
Smyrou E, Priestley NMJ, Carr AJ (2011) Modelling of elastic damping in nonlinear time history analyses of cantilever RC walls. Bull Earthq Eng. doi:10.1007/s10518-011-9286-y
Warn GP, Ryan KL (2012) A review of seismic isolation for buildings: historical development and research needs. Buildings 2:300–325
Zayas V, Low S (1990) A simple pendulum technique for achieving seismic isolation. Earthq Spectra 6(2):317–333
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Calvi, P.M., Ruggiero, D.M. Numerical modelling of variable friction sliding base isolators. Bull Earthquake Eng 14, 549–568 (2016). https://doi.org/10.1007/s10518-015-9834-y
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10518-015-9834-y