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Optimal Response-Related Weighting Matrices to Control Semi-Active Base Isolation Systems

. - Youlin, X. - Weilian, Q. - Zhilun, W. (2004) Seismic response control of a complex structure using multiple MR dampers: experimental investigation. Earthquake Engineering and Engineering Vibration, Vol. 3, No. 2, pp. 181-193. Johnson, E.A. - Ramallo, J.C. - Spencer, B.F. - Sain, M.K. (1999) Intelligent base isolation systems. Proc., Second World Conf. on Structural Control, Kyoto, Japan, Vol. 1, pp. 367-376. Jung, H.J. - Choi, K.M. - Spencer, B.F. - Lee, I.W. (2006) Application of some semi-active control algorithms to a smart base

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Seismic Base Isolators For A Silo Supporting Structure

Conference of Earthquake Engineering, Rotterdam. [7]. Naein, F. and Kelly, J. M. (1999). Design of isolated structures. John WILEY & Sons, New-York. [8]. Kircher C.A. Seismically Isolated Structures, Chapter 11 of Guide to the Application of the 2000 NEHRP. [9]. Kelly T.E. (2001). Base insulation of structures: Design guideline, WellingtoN. [10]. Oprişoreanu V.V. (2012). Contribution in the implementation of the base isolation method for Romania , Ph.D. thesis, UTCB. [11]. Bitca D., Ursu E., Ioan P. (2013). The concept of base isolation

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Parameters Influencing the Response of a Base-Isolated Building

, H.M. - Lu, L.Y. (2009) Dynamic behavior of nonlinear rolling isolation system. Structural Control Health Monitoring,; 16, 1, 2009, pp. 32-54. [8] Constantinou, M.C. - Tadjbakhsh, I.G, (1985) Hysteretic dampers in base isolation: Random approach . American Society for Civil Engineering, 111, 4, 1985, pp. 705-721. [9] Hong, W.- Kim, H. (2004) Performance of a multi-storey structure with a resilient-friction base isolation system. Computers & Structures, 82, 27, 2004, pp. 2271-2283. [10] Islam, ABMS. - Jameel, M

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Numerical Solutions for Nonlinear High Damping Rubber Bearing Isolators: Newmark’s Method with Netwon-Raphson Iteration Revisited

. Earthq. Eng. , 14 (2016), No. 12 , 3591-3611. [5] O liveto , G., M. G ranata , G. B uda , P. S ciacca . Preliminary Results from Fullscale Free Vibration Tests on a Four Story Reinforced Concrete Building after Seismic Rehabilitation by Base Isolation, In: JSSI 10th Anniversary Symposium on Performance of Response Controlled Buildings, Japan, Yokohama, 2004. [6] M arkou , A. A., G. O liveto , A. A thanasiou . Response Simulation of Hybrid Base Isolation Systems under Earthquake Excitation. Soil Dyn. Earthq Eng. , 84 (2016), 120-133. [7] C hopra

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Energy and Transmissibility in Nonlinear Viscous Base Isolators


High damping rubber bearings (HDRB) are the most commonly used base isolators in buildings and are often combined with other systems, such as sliding bearings. Their mechanical behaviour is highly nonlinear and dependent on a number of factors. At first, a physical process is suggested here to explain the empirical formula introduced by J.M. Kelly in 1991, where the dissipated energy of a HDRB under cyclic testing, at constant frequency, is proportional to the amplitude of the shear strain, raised to a power of approximately 1.50. This physical process is best described by non-Newtonian fluid behaviour, originally developed by F.H. Norton in 1929 to describe creep in steel at high-temperatures. The constitutive model used includes a viscous term, that depends on the absolute value of the velocity, raised to a non-integer power. The identification of a three parameter Kelvin model, the simplest possible system with nonlinear viscosity, is also suggested here. Furthermore, a more advanced model with variable damping coefficient is implemented to better model in this complex mechanical process. Next, the assumption of strain-rate dependence in their rubber layers under cyclic loading is examined in order to best interpret experimental results on the transmission of motion between the upper and lower surfaces of HDRB. More specifically, the stress-relaxation phenomenon observed with time in HRDB can be reproduced numerically, only if the constitutive model includes a viscous term, that depends on the absolute value of the velocity raised to a non-integer power, i. e., the Norton fluid previously mentioned. Thus, it becomes possible to compute the displacement transmissibility function between the top and bottom surfaces of HDRB base isolator systems and to draw engineering-type conclusions, relevant to their design under time-harmonic loads.

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Vibration Problems of an Example of Temporary Steel Grandstand under Human-Induced Excitation / Problemy Drgań Przykładowej Tymczasowej Trybuny Stalowej Poddanej Oddziaływaniom Dynamicznym Wywołanym Przez Ludzi

new base isolation system to reduce structural damage during earthquakes, Key Engineering Materials, 569-570, (2013) 143-150. 5. Falborski T., Jankowski R., Kwiecień A.: Experimental study on polymer mass used to repair damaged structures, Key Engineering Materials, 488-489, (2012) 347-350. 6. Lasowicz N., Jankowski R.: Numerical analysis of a temporary steel grandstand, In: Shell Structures: Theory and Applications - Proc. of the X SSTA Conference, CRC/Balkema, Leiden, Netherlands, 3, (2014) 543-546. 7. Lasowicz N

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Short Note: Isolation and Characterization of Microsatellite Loci in Castanopsis fissa in Lower Subtropical China

.0 (d16c). Free program distributed by the authors over the internet from LUNT, D. H., W. F. HUTCHINSON and G. R. CARVALHO (1999): An efficient method for PCR-based isolation of microsatellite arrays (PIMA). Molecular Ecology 8: 891-894. RAYMOND, M. and F. ROUSSET (1995): GENEPOP (version 1.2): population genetics software for exact tests and ecumenicism. Journal of Heredity 86: 248-249. ROUSSET, F. (2008): Genepop’007: a complete reimplementation of the Genepop

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The Calculation of the Contact Force and the Contact Width of Shaft Seals

REFERENCES [1] Smrček O. “Stručné dějiny oborů –Strojírenství”, Praha, Scientia, 2006 . ISBN: 80-7183-247-2 [2] Pump classifications. Retrieved on 2011-05-25. [3] Improving Pumping System Performance: A Sourcebook for Industry, Second Edition, May 2006 . Accessed 2015-05-22. [4] Billings, L. J., Shepherd, R. “The Modeling of Layered Steel/Elastomer Seismic Base Isolation Bearings,” Proc. 1992 MARC Users Conference, Monterey, California, September 3-4, 1992 . [5] Bretl, J. L. “Implementation of the Elastomer Tearing Energy

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Short Note: Development and characterization of 16 new polymorphic microsatellite loci for Schima superba (Theaceae)

-186. LUNT, D. H., W. F. HUTCHINSON and G. R. CARVALHO (1999): An efficient method for PCR-based isolation of microsatellite arrays (PIMA). Molecular Ecology 8: 891-894. PEAKALL, R. and P. E. SMOUSE (2006): GENALEX 6: genetic analysis in Excel. Population genetic software for teaching and research. Molecular Ecology Notes 6: 288-295. R DEVELOPMENT CORE TEAM (2011): R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051- 07-0, URL http

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Short Note: Isolation and Characterization of 12 Polymorphic Microsatellite Markers in Engelhardia roxburghiana (Juglandaceae)

Garden Press, St. Louis. USA. LUNT, D. H., W. F. HUTCHINSON and G. R. CARVALHO (1999): An efficient method for PCR-based isolation of microsatellite arrays (PIMA). Molecular Ecology 8: 891-894. MANOS, P. S. and D. E. STONE (2001): Evolution, phylogeny, and systematics of the Juglandaceae. Annals of the Missouri Botanical Garden 88: 231-269. ROUSSET, F. (2008): GENEPOP’007: A complete reimplementation of the GENEPOP software for Windows and Linux. Molecular Ecology Resources 8: 103-106. ROZEN, S. and H

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