Earthquakes and Structures

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Comparing the dynamic behavior of a hospital-type structure with fixed and isolated base

  • Nasery, Mohammad Manzoor (Karadeniz Technical University, Department of Civil Engineering) ;
  • Ergun, Mustafa (Karadeniz Technical University, Department of Civil Engineering) ;
  • Ates, Sevket (Karadeniz Technical University, Department of Civil Engineering) ;
  • Husem, Metin (Karadeniz Technical University, Department of Civil Engineering)
  • Received : 2014.09.01
  • Accepted : 2015.03.13
  • Published : 2015.09.25
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Abstract

The level of ductility is determined by depending on the intended use of the building, the region's seismic characteristics and the type of structural system when buildings are planned by engineers. Major portion of seismic energy is intended to be consumed in the plastic zone in structural systems of high ductility, so the occurrence of damages in load bearing and non-load bearing structural elements is accepted in planning stage under severe earthquakes. However, these damages must be limited among specific values in order not to endanger buildings in terms of the bearing capacity. Isolators placed between the basement and upper structure make buildings behave elastically by reducing the effects of seismic loads and improving seismic performance of building significantly. Thus, damages can be limited among desired values. In this study, the effectiveness of seismic isolation is investigated on both fixed based and seismic isolated models of a hospital building with high ductility level with regard to lateral displacements, internal forces, structural periods and cost of the building. Layered rubber bearings are interposed between the base of the structure and foundation. Earthquake analysis of the building are performed using earthquake records in time domain (Kocaeli, Loma Prieta and Landers). Results obtained from three-dimensional finite element models are presented by graphs and tables in detail. That seismic isolation reduces significantly the destructive effects of earthquakes on structures is seen from the results obtained by seismic analysis.

Keywords

Acknowledgement

Supported by : Karadeniz Technical University

References

  1. Bagheri, M. and Khoshnoudian, F. (2014), "The effect of impact with adjacen structure on seismic behavior of base-isolated buildings with DCFP bearings", Struct. Eng. Mech., 51(2), 277-297. https://doi.org/10.12989/sem.2014.51.2.277
  2. Buckle, I.G. and Mayes, R.L. (1990), "Seismic isolation history: Application, and performance-A world view", Earthq. Spectra, 6(2), 161-201. https://doi.org/10.1193/1.1585564
  3. Constantinou, M., Mokha, A. and Reinhorn, A. (1990), "Teflon bearing in base isolation II: modeling", J. Struct. Eng., ASCE, 116, 455-474. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:2(455)
  4. Erdik, M. (2007), "Seismic isolation for buildings", Sixth National Conference on Earthquake Engineering, 16-20 October, Istanbul, Turkey.
  5. Ergun, M. and Ates, S. (2014), "Comparing of the effects of scaled and real earthquake records on structural response", Earthq. Struct., 6(4), 375-392. https://doi.org/10.12989/eas.2014.6.4.375
  6. IdeCAD Statik Version 7.022 (2013), Ideyapi, Istanbul.
  7. Jangid, R.S. and Datta, T.K. (1995), "Seismic behavior of base isolated buildings: A-state of the art review", Struct. Build., 110(2), 186-203. https://doi.org/10.1680/istbu.1995.27599
  8. Khoshnoudian, F. and Rabiei, M. (2010), "Seismic response of double concave friction pendulum base-isolated structures considering vertical component of earthquake", Adv. Struct. Eng., 13(1), 1-14. https://doi.org/10.1260/1369-4332.13.1.1
  9. Kunde, M.C. and Jangid, R.S. (2003), "Seismic behavior of isolated bridges: A-state-of-the-art review", Electron. J. Struct. Eng., 3(2), 140-170.
  10. Morgan, T.A. and Mahin, S.A. (2008), "Performance-based design of seismic isolated buildings considering multiple performance objectives", Smart Struct. Syst., 4(5), 655-666. https://doi.org/10.12989/sss.2008.4.5.655
  11. Pacific Earthquake Engineering Research (PEER) Center (2006), PEER strong motion database, http://peer.berkeley.edu/smcat.
  12. TEC 2007 (2007), Specifications for Buildings to Be Built in Seismic Areas, Turkish Earthquake Code 2007, Ministry of Public Works and Settlement, Ankara, Turkey.
  13. Tracis, A.C. (1984), Report NSF and Country of San Bernardino, The Implementation of Base Isolation for Foothill Communities Law and Justice Center, San Francisco.
  14. Yang, Z.D. and Eddie, S.S. (2015), "Seismic mitigation of an existing building by connecting to a base-isolated building with visco-elastic dampers", Struct. Eng. Mech., 53(1), 57-71. https://doi.org/10.12989/sem.2015.53.1.057
  15. Yurdakul, M. and Ates, S. (2011), "Modeling of triple concave friction pendulum bearings for seismic isolation of buildings", Struct. Eng. Mech., 40(3), 315-334. https://doi.org/10.12989/sem.2011.40.3.315
  16. Zayas, V.A., Low, S.S. and Mahin, S.A. (1990), "A simple pendulum technique for achieving seismic isolation", Earthq. Spectra, 6(2), 317-333. https://doi.org/10.1193/1.1585573

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