Comparison of adaptive magnetorheological elastomer isolator and elastomeric isolator in near-field and far-field earthquakes

Document Type : Article

Authors

Department of Civil Engineering, Ferdowsi University of Mashhad, Mashhad, P.O. Box 9177948944-1111, Iran.

Abstract

Magnetorheological elastomer (MRE) materials are widely used in the development of smart isolators and absorbers due to their stiffness and damping adaptability. This study investigates the performance of MRE isolators and elastomeric isolators from near-field and far-field earthquakes in benchmark base isolation buildings. All earthquakes are simultaneously applied in two horizontal directions to the horizontal plan. Vertical earthquakes are not attended in the dynamical analysis of benchmark base isolation buildings. For making an isolator model, the effect of bilateral interaction has been considered. The behaviors of MRE isolators and MR dampers are compared. To this end, three control systems including adaptive isolator, passive isolator and semi-active MR damper are considered. The results show that the MRE isolator has a better performance in near-field earthquakes due to its variable stiffness and damping, as compared to the elastomeric isolator. The semi-active MR damper for both far-field and near-field earthquakes has a better control to reduce base displacement, but causes to increase floor accelerations, story drifts and story shear. According to the results of this study, it can be observed that MRE isolator can be used instead of MR damper. The MRE isolator can reduce the base displacement without increasing other responses.

Keywords

Main Subjects


References
1. Naeim, F. and Kelly, J.M., Design of Seismic Isolated
Structures: From Theory to Practice, Wily (1999).
2. Komodromos, P., Seismic Isolation for Earthquake
Resistant Structures, WIT Press/Computational Mechanics
(2001).
3. Kelly, J.M. \Base isolation: linear theory and design",
Earthq. Spectra, 6(2), pp. 223{244 (1990).
4. Kelly, J.M. \The current state of base isolation in the
United States", 2th World Conf. on Structural Control,
Kyoto, pp. 1043{1052 (1999).
5. Kelly, J.M. \Seismic isolation systems for developing
countries", Earthq. Spectra, 18(3), pp. 385{406 (2002).
S. Taghizadeh and A. Karamodin/Scientia Iranica, Transactions A: Civil Engineering 28 (2021) 15{37 35
6. Morgan, T.A. \The use of innovative base isolation
systems to achieve complex seismic performance objectives",
PhD Dissertation University of California,
Berkeley (2007).
7. Pan, P., Zam rescu, D., Nakashima, M., Nakayasu,
N., and Kashiwa, H. \Base-isolation design practice in
Japan: introduction to the post-Kobe approach", J.
Earthq. Eng., 9(1), pp. 147{171 (2005).
8. Kim, H.S., Roschke, P.N., Lin, P.Y., and Loh, C.H.
\Neuro-fuzzy model of hybrid semi-active base isolation
system with FPS bearings and an MR damper",
Eng. Struct., 28(7), pp. 947{958 (2006).
9. Spencer Jr, B.F. and Nagarajaiah, S. \State of the
art of structural control", J. Struct. Eng., 129(7), pp.
845{856 (2003).
10. Jangid, R.S. and Kelly, J.M. \Base isolation for nearfault
motions", Earthq. Eng. Struct. Dyn., 30(5), pp.
691{707 (2001).
11. Mazza, F. and Vulcano, A. \E ects of near-fault
ground motions on the nonlinear dynamic response
of base-isolated R C framed buildings", Earthq. Eng.
Struct. Dyn., 41(2), pp. 211{232 (2011).
12. Nagarajaiah, S., Narasimhan, S., and Johnson, E.
\Structural control benchmark problem: phase IInonlinear
smart base-isolated building subjected to
near fault earthquakes", J. Struct. Control Health
Monit., 15(5), pp. 653{656 (2008).
13. Chopra, A.K. and Chintanapakdee, C. \Comparing
response of SDF systems to near-fault and far-fault
earthquake motions in the context of spectral regions",
Earthq. Eng. Struct. Dyn., 30(12), pp. 1769{1789
(2001).
14. Abdalla, J.A., Petrovski, J.T., and Mohamedzein, Y.E.
\Vibration characteristics of a far- eld earthquake and
its shaking e ects on Dubai emerging skycrapers",
14th World Conf. on Earthquake Engineering, Beijing,
China (2008).
15. Kelly, J.M. \The role of damping in seismic isolation",
Earthq. Eng. Struct. Dyn., 28(1), pp. 3{20 (1999).
16. Yaghmaei-Sabegh, S., Safari, S., and Abdolmohammad,
K. \Characterization of ductility and inelastic
displacement demand in base-isolated structures considering
cyclic degradation", J. Earthq. Eng., 23(4),
pp. 557{591 (2019).
DOI: 10.1080/13632469.2017.1326415
17. Yaghmaei-Sabegh, S., Safari, S., and Abdolmohammad,
K. \Estimation of inelastic displacement ratio for
base-isolated structures", Earthq. Eng. Struct. Dyn.,
47(3), pp. 634{659 (2018). DOI: 10.1002/eqe.2983
18. Rofooei, F.R. and Ebrahimi, M. \Evaluation of the
vertical distribution of base shear force in base-isolated
structures", Scientia Iranica, 14(1), pp. 11{22 (2007).
19. Kelly, J.M. \Base isolation: origins and development",
EERC News (1991).
20. Ronbinson, W.H. \Lead-Rubber hysteretic bearings
suitable for protecting structures during earthquakes",
Earthq. Eng. Struct. Dyn., 10(4), pp. 593{604 (1982).
21. Fuller, K.N.G., Gough, J., Pond, T.J., and Ahmadi,
H.R. \High damping natural rubber seismic isolators",
J. Struct. Control Health Monit., 4(2), pp. 19{40
(1997).
22. Lu, L.Y. and Lin, G.L. \Fuzzy friction controllers for
semi-active seismic isolation systems", J. Intell. Mater.
Syst. Struct., 20(14), pp. 1747{1770 (2009).
23. Yang, J.N. and Agrawal, A.K. \Semi-active hybrid
control systems for nonlinear buildings against near-
eld earthquakes", Eng. Struct., 24(3), pp. 271{280
(2002).
24. Lin, P.Y., Roschke, P.N., and Loh, C.H. \Hybrid base
isolation with magneto-rheological damper and fuzzy
control", J. Struct. Control Health Monit., 14(3), pp.
384{405 (2006).
25. Malekzadeh, M. and Taghikhany, T. \Adaptive behavior
of double concave friction pendulum bearing and its
advantages over friction pendulum systems", Scientia
Iranica, Transactions A: Civil Engineering, 17(2), pp.
81{88 (2010).
26. Popp, K., Kroger, M., Li, W., Zhang, X., and Kosasih,
P.B. \MRE properties under shear and squeeze modes
and applications", J. Intell. Mater. Syst. Struct.,
21(15), pp. 1471{1477 (2010).
27. Li, W.H., Zhou, Y., and Tian, T.F. \Viscoelastic
properties of MR elastomers under harmonic loading",
Rheol. Acta, 49(7), pp. 733{740 (2010).
28. Li, W.H., Zhang, X.Z., Du, H., and Chen, D.F. \Enhance
MR elastomer performance with nano particles
additives", 3th Asia-Paci c Conf. Transducers and
Micro/Nanotechnology, Singapore (2006).
29. Abramchuk, S.S., Grishin, D.A., Kramarenko, E.Y.,
Stepanov, G.V., and Khokhlov, A.R. \E ect of a
homogeneous magnetic eld on the mechanical behavior
of soft magnetic elastomers under compression
Polym", Sci. Ser. A Polym. Phys., 48(2), pp. 138{145
(2006).
30. Chen, L., Gong, X.L., and Li, W.H. \Damping of magnetorheological
elastomers", Chin. J. Chem. Phys.,
21(6), pp. 581{585 (2008).
31. Behrooz, M., Wang, X.J., and Gordaninejad, F.
\A semi-active/passive isolator", 5th World Conf. on
Struct. Control Monit., Shinjuku, Tokyo, p. 049 (2010).
32. Opie, S. and Yim, W. \Design and control of
a real-time variable sti ness vibration isolator",
IEEE/ASME Int. Conf. Advanced Intelligent Mechatronics,
Singapore, pp. 380{385 (2009).
33. Li, Y., Li, J., Li, W., and Samali, B. \Development
and characterization of a magnetorheological elastomer
based adaptive seismic isolator", Smart Mater. Struct.,
22(3), pp. 1{12 (2013).
34. Li, Y. and Li, J. \A highly adjustable base isolator
utilizing magnetorheological elastomer: Experimental
testing and modeling", J. Vib. Acoust., 137(1), 011009
(2015).
36 S. Taghizadeh and A. Karamodin/Scientia Iranica, Transactions A: Civil Engineering 28 (2021) 15{37
35. Li, Y., Li, J., Tian, T., and Li, W. \A highly
adjustable magnetorheological elastomer base isolator
for applications of real-time adaptive control", Smart
Mater. Struct., 22(9), pp. 1{18 (2013).
36. Zhao, L., Yu, M., Fu, J., Zhu, M., and Li, B. \A miniature
MRE isolator for lateral vibration suppression of
bridge monitoring equipment: design and veri cation",
Smart Mater. Struct., 26(4), 047001 (2017).
37. Gu, X., Li, J., and Li, Y. \Adaptive base isolation
system with magneto rheological elastomer base isolators:
Numerical investigations", 6th World Conf.
on Structural Control and Monitoring, 1, Barcelona,
Spain (2014).
38. Gu, X., Li, J., Li, Y., and Askari, M. \Frequency
control of smart base isolation system employing A
novel adaptive magneto-rheological elastomer base isolator",
J. Intell. Mater. Sys. Struct., 27(7), pp. 849{
858 (2015).
39. Gu, X., Li, J., and Li, Y. \Innovative semiactive
storey isolation system utilising novel magnetorheological
elastomer base isolators", In ST Smith
(Ed.), 23rd Australasian Conf. on the Mechanics of
Structures and Materials (ACMSM23), 2, Byron Bay,
NSW, 9{12 December, Southern Cross University,
Lismore, NSW, pp. 925{930 (2014).
40. Gu, X., Li, Y., and Li, J. \Investigations on response
time of magnetorheological elastomer isolator for realtime
control implementation", Smart Mater. Struct.,
25(11), 11L04 (2016).
41. Yang, J., Sun, S., Tian, T.F., Li, W., Du, H., Alici, G.,
and Nakano, M. \Development of a novel multi-layer
MRE isolator for suppression of building vibrations under
seismic events", Mech. Syst. and Signal Processing,
70(71), pp. 811{820 (2016).
42. Jolly, M.R., Carlson, J.D., and Munoz, B.C. \A model
of the behaviour of magnetorheological materials",
Smart Mater. Struct., 5(5), pp. 607{614 (1996).
43. Davis, L.C. \Model of magnetorheological elastomers",
J. Applied Phys, 85(6), pp. 3348{3351 (1999).
44. Gu, X., Yu, Y., Li, J., and Li, Y. \Semi-active control
of magnetorheological elastomer base isolation system
utilising learning-based inverse model", Journal of
Sound and Vibration, 406, pp. 346{362 (2017).
45. Li, W.H., Zhang, X.Z., and Du, H. \Magnetorheological
elastomers and their applications", In P.M. Visakh,
S. Thomas, A.K. Chandra and A.P. Mathew (Eds.),
Advances in Elastomers I: Blends and Interpenetrating
Networks, Berlin, Germany: Springer, pp. 357{374
(2013).
46. Yang, J., Du, H., Li, W., Li, Y., Li, J., Sun, S., and
deng, H.X. \Experimental study and modeling of a
novel magnetorheological elastomer isolator", Smart
Mater. Struct., 22(11), pp. 1{14 (2013).
47. Narasimhan, S., Nagarajaiah, S., Gavin, H.P., and
Johnson, E.A. \Smart base isolated benchmark building
part I: problem de nition", J. Struct. Control and
Health Monit., 13(2{3), pp. 573{588 (2006).
48. Nagarajaiah, S. and Narasimhan, S. \Smart base
isolated benchmark building part II: phase I sample
controllers for linear isolation system", J. Struct.
Control Health Monit., 13(2{3), pp. 589{604 (2006).
49. Erkus, B. and Johnson, E.A. \Smart base isolated
benchmark building part III: a sample controller for
bilinear isolation", J. Struct. Control Health Monit.,
13(2{3), pp. 605{625 (2006).
50. Narasimhan, S., Nagarajaiah, S., and Johnson, E.A.
\Smart base isolated benchmark building part IV:
phase II. Sample controller for nonlinear isolation
systems", J. Struct. Control Health Monit., 15(5), pp.
657{672 (2008).
51. Sharma, A. and Jangid, R.S. \Seismic response of
base-isolated benchmark building with variable sliding
isolators", J. Earthq. Eng., 14(7), pp. 1063{1091
(2010).
52. Li, Y., Li, J., and Li, Y., Adaptive MRE Vibration Isolation
Assembly and System, University of Technology,
Sydney (2014).
53. Harvey Jr, P.S. and Gavin, H.P. \Truly isotropic biaxial
hysteresis with arbitrary knee sharpness", Earthq.
Eng. Struct. Dyn., 43(13), pp. 2051{2057 (2014).
54. Spencer Jr, B.F., Dyke, S.J., Sain, M.K., and Carlson,
J.D. \Phenomenological model of a magnetorheological
damper", J. Eng. Mech., 123(3), pp. 230{238
(1997).
55. Choi, S.B., Lee, S.K., and Park, Y.P. \A hysteresis
model for eld-dependent damping force of a magnetorheological
damper", J. Sound Vib., 245(2), pp.
375{383 (2001).
56. Jung, H.J., Spencer Jr, B.F., and Lee, I.W. \Control
of seismically excited cable-stayed bridge employing
magnetorheological
uid dampers", J. Struct. Eng.,
129(7), pp. 873{883 (2003).
57. Zapateiro, M., Karimi, H.R., Luo, N., Phillips, B.M.,
and Spencer Jr, B.F. \Semiactive backstepping control
for vibration reduction in a structure with magnetorheological
damper subject to seismic motions", J. Intell.
Mater. Sys. Struct., 20(17), pp. 2037{2053 (2009).
58. Jangid, R.S. and Kelly, J.M. \Base isolation for nearfault
motions", Earthquake Eng. Struct. Dyn., 30, pp.
691{707 (2001).
59. Reigles, D.G. and Symans, M.D. \Supervisory fuzzy
control of a base isolated benchmark building utilizing
a neuro-fuzzy model of controllable
uid viscous
dampers", J. Struct. Control Health Monit., 13, pp.
724{747 (2006).
60. Kim, H.S. and Roschke, P.N. \GA-fuzzy control of
smart base isolated benchmark building using supervisory
control technique", Advances in Engineering
Software, 38(7), pp. 453{465 (2007).