Seismic Analysis and Comparison of Different Base Isolation Systems for a Multi-Storey RC Building with Irregularities in Plan

Abstract:

In the present paper the dynamic nonlinear analysis for a 3D base isolated structure is illustrated. A base isolated reinforced concrete building is designed and verified according to the European seismic codes such that the superstructure remains almost completely elastic and the nonlinear elements are localized only in the base isolation system. Nonlinear hysteretic models have been adopted to reproduce the cyclic behavior of the isolators. Two different base isolation systems are considered and their performances are compared for evaluating the behaviour of a base isolated building, highly irregular in plan, in presence of a seismic excitation defined with recorded accelerograms which characterize the bi-directional ground motions. The isolation system has been realized with a combination in parallel of elastomeric bearings and sliding devices. In the first analyzed isolation system we have used the High Damping Rubber Bearings (HDRB) and in the second analyzed isolation system we have used the Lead Rubber Bearings (LRB). Finally a comparative analysis between the base isolated structure with hybrid base isolation systems and the conventional fixed base structure is detailed.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 1788-1799
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.1788
• Online since: November 2012
• Authors: Donato Cancellara, Fabio de Angelis
• Keywords: Base Isolation System, Dynamic Nonlinear Analysis, Elastomeric Bearing, Seismic Behavior

References

[1] F. Naeim and J. M. Kelly, Design of Seismic Isolated Structures, John Wiley, New York, (1999).

[2] K. L. Ryan and A .K. Chopra, Estimation of seismic demands on isolators based on nonlinear analysis, J. Struct. Eng., ASCE, 130, pp.392-402, (2004).

DOI: 10.1061/(asce)0733-9445(2004)130:3(392)

[3] C. Christopoulos, A. Filiatrault, Principles of Passive Supplemental Damping and Seismic Isolation, IUSS Press, Pavia, Italy, (2006).

DOI: 10.1061/(asce)0733-9445(2007)133:8(1192)

[4] Y.J. Park, Y.K. Wen and A. H-S. Ang, Random Vibration of Hysteretic Systems under Bi-Directional Ground Motions, Earthquake Engineering and Structural Dynamics, Vol. 14, (1986).

DOI: 10.1002/eqe.4290140405

[5] S. Nagarajaiah, A. M. Reinhorn and M. C. Constantinou, 3D-Basis: Nonlinear Dynamic Analysis of Three-Dimensional Base Isolated Structures: Part II, Technical Report NCEER-91-0005, Nation Center For Earthquake Engineering Research, Buffalo, N.Y., (1991).

[6] E.L. Wilson, Three-Dimensional Static and Dynamic Analysis of Structures, A Physical Approach With Emphasis on Earthquake Engineering, Computers and Structures, Inc., (2003).

[7] Y.K. Wen, Method for Random Vibration of Hysteretic Systems, Journal of the Engineering Mechanics Division, ASCE, Vol.102 (2), pp.249-263, (1976).

DOI: 10.1061/jmcea3.0002106

[8] A.S. Mokha, M.C. Constantinou and A.M. Reinhorn, Teflon bearing in base isolation. I: testing, J. Struct. Engrg. ASCE, Vol. 116 (2), pp.438-454, (1990).

DOI: 10.1061/(asce)0733-9445(1990)116:2(438)

[9] A.S. Mokha, M.C. Constantinou and A.M. Reinhorn, Teflon bearing in base isolation. II: modelling, J. Struct. Engrg. ASCE, Vol. 116 (2), pp.455-474, (1990).

DOI: 10.1061/(asce)0733-9445(1990)116:2(455)

[10] W. H. Robinson and A. G. Tucker, A lead-rubber shear damper, Bull. N. 2. Natl. Soc. Earthquake Eng., 10, 151-153, (1977).

[11] W. H. Robinson, Lead rubber hysteretic bearings suitable for protecting structures during earthquakes, PEL Report No. 715, (1981).

DOI: 10.2140/siaps.2011.2.5

[12] D. Cancellara, M. Pasquino, Performance Based Design according to EC8: Fixed-Base vs. Base-Isolated RC frame structures, Ingegneria sismica, Vol.26, n.2, pp.50-61, (2009).

[13] D. Cancellara, M. Pasquino, Proposal of passive seismic control device: HDHSI (High Damping Hybrid Seismic Isolator), 8th International Conference on Structural Dynamics, 4-6 July 2011 Leuven, Belgium, (2011).

[14] D. Cancellara, M. Pasquino, A new passive seismic control device for protection of structures under anomalous seismic events, Applied Mechanics and Materials, Vol.82, pp.651-656, (2011).

DOI: 10.4028/www.scientific.net/amm.82.651

[15] EC8, Eurocode 8: Design of Structures for Earthquake Resistance - Part 1: General rules, seismic actions and rules for buildings, PrEN1998-1, European Committee for Standardization, TC250/SC8, (2003).

DOI: 10.3403/03244372u

[16] ESD,EuropeanStrong-motion Database, http://www.isesd.cv.ic.ac.uk/ESD/frameset.htm

[17] EC2, Eurocode 2: Design of concrete structures, UNI EN 1992-1-1, European Committee for Standardization, CEN/TC 250, (2004).

[18] D. Cancellara, F. De Angelis, V. Pasquino, Displacement based approach for the seismic retrofitting of a RC existing building designed for only gravitational loads, Applied Mechanics and Materials, Vol. 166-169, pp.1718-1729, (2012).

DOI: 10.4028/www.scientific.net/amm.166-169.1718

[19] M.C. Constantinou, Y.S. Tsoupelas, S. Okamoto, NCEER-TAISEI corporation research program on sliding seismic isolation systems for bridges: experimental and analytical studies, Rep. No. NCEER-93-0020, National Center for Earthquake Engineering Research, Buffalo, N.Y., (1993).

[20] F. De Angelis, An internal variable variational formulation of viscoplasticity, Computer Methods in Applied Mechanics and Engineering, Vol. 190, n. 1-2, pp.35-54, (2000).

DOI: 10.1016/s0045-7825(99)00306-0

[21] F. De Angelis, A variationally consistent formulation of nonlocal plasticity, Int. Journal for Multiscale Computational Engineering, Vol. 5, n. 2, pp.105-116, (2007).

DOI: 10.1615/intjmultcompeng.v5.i2.40

[22] F. De Angelis, Multifield potentials and derivation of extremum principles in rate plasticity, Materials Science Forum, Vol. 539-543, pp.2625-2630, (2007).

DOI: 10.4028/www.scientific.net/msf.539-543.2625

[23] F. De Angelis, Evolutive laws and constitutive relations in nonlocal viscoplasticity, Applied Mechanics and Materials, Vol. 152-154, pp.990-996, (2012).

DOI: 10.4028/www.scientific.net/amm.152-154.990

[24] F. De Angelis, A comparative analysis of linear and nonlinear kinematic hardening rules in computational elastoplasticity, Technische Mechanik, Vol. 32, n. 2-5, pp.164-173, (2012).

[25] G. Alfano, F. De Angelis, L. Rosati, General solution procedures in elasto/ viscoplasticity, Computer Methods in Applied Mechanics and Engineering, Vol. 190, pp.5123-5147, (2001).

DOI: 10.1016/s0045-7825(00)00370-4

[26] F. De Angelis, D. Cancellara, M. Modano, V. Pasquino, The consequence of different loading rates in elasto/viscoplasticity, Procedia Engineering, Vol. 10, pp.2911-2916, (2011).

DOI: 10.1016/j.proeng.2011.04.483

[27] F. De Angelis, D. Cancellara, Implications due to different loading programs in inelastic materials, Advanced Material Research, Vol. 422, pp.726-733, (2012).

DOI: 10.4028/www.scientific.net/amr.422.726

[28] F. De Angelis, D. Cancellara, Results of distinct modes of loading procedures in the nonlinear inelastic behavior of solids, Advanced Material Research, Vol. 482-484, pp.1004-1011, (2012).

DOI: 10.4028/www.scientific.net/amr.482-484.1004