Change of Axial Forces in Layered Rubber–Steel Base Isolators of High-Rise Buildings at Earthquake Impact

Authors

DOI:

https://doi.org/10.54338/27382656-2024.6-004

Keywords:

base isolation, high-rise building, earthquake, nonlinear analyses

Abstract

Seismic isolation technology makes buildings more capable of withstanding earthquakes, protecting them from major damages or collapse. The same methods of analyses are not suitable for all types of buildings. The isolation system used Armenia, unlike foreign countries ones, cannot take any tension forces since the system doesn't have structural connections to superstructure and substructure of a building. The consequence of this fact can be the occurrence of additional stresses after the redistribution of axial forces in rubber base isolations in high-rise buildings during a seismic action. The stress-strain state analyses of rubber base seismic isolation systems in reinforced concrete dual frame-wall buildings with application of a finite element method carried out in the manuscript. An increase of the stresses during seismic action is discussed and investigated using both Fast-nonlinear time history analysis (FNTHA) and Direct-integration nonlinear time-history analysis (DINTHA). Analysis of the results of the study shows that the axial forces after their redistribution during horizontal earthquake loads in most seismic isolators of high-rise building do not exceed 8%, but for some isolators this difference varies within the range of 12-18%. Taking into account the vertical component, the difference does not exceed 20%, with the exception of three isolators, where it can reach up to 23%. An average increase of the compressive axial forces in the seismic isolation bearing systems of the tall building as a result of redistribution can be taken about 10%. In this case, the displacements and the axial forces of the seismic isolators during analysis of their bearing capacity must be considered simultaneously, but not separately from each other.

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Author Biographies

Tigran Dadayan, National University of Architecture and Construction of Armenia

Doctor of Science in Engineering (RA, Yerevan) - National University of Architecture and Construction of Armenia, Full Professor at the Chair of Building Structures

Lusine Karapetyan, National University of Architecture and Construction of Armenia

Doctor of Philosophy (PhD) in Engineering (RA, Yerevan) - National University of Architecture and Construction of Armenia, Associate Professor at the Chair of Building Structures

References

RABC 20-04-2020, Building Code, Earthquake resistant construction design codes, Yerevan, 2021.https://www.arlis.am/Annexes/6/2020_N102hav.inc25.docx

F. Naeim, J. Kelly, Design of Seismic Isolated Structures: From Theory to Practice. John Wiley & Sons, Hoboken, New Jersey, 1999.

A. Martelli, P. Clemente, A.De Stefano, M. Forni, A. Salvatori, Recent Development and Application of Seismic Isolation and Energy Dissipation and Conditions for Their Correct Use, in: A. Ansal, (ed.), Perspectives on European Earthquake Engineering and Seismology, Springer, Cham, 2014, 449-488. Doi: https://doi.org/10.1007/978-3-319-07118-3

M. Melkumyan, Lusabats, New Solutions in Seismic Isolation. Lusabats, Yerevan, 2011.

J. Kelly, Base Isolation: Linear Theory and Design. Earthquake Spectra, 6 (2), 1990, 223-244.Doi: https://doi.org/10.1193/1.1585566

J. Kelly, D. Konstantinidis, Mechanics of Rubber Bearings for Seismic and Vibration Isolation. John Wiley & Sons, Hoboken, New Jersey, 2011. Doi: https://doi.org/10.1002/9781119971870

T.L. Dadayan, Redistribution of Forces in Rubber Base Isolations of Multistory Buildings During Earthquake Action. Proceedings of the 9th International Conference on Contemporary Problems of Architecture and Construction, Batumi, Georgia, September 13-18, 2017, 141-144.

E.L. Wilson, Static and Dynamic Analysis of Structures, Computers & Structures, Inc., New York, 2004.

J. Kelly, J.J. Lee, Seismic Isolation - A Primer. Computers & Structures, Inc., New York, 2019.

N. Newmark, W. Hall, Earthquake Spectra and Design. Earthquake Engineering Research Institute, Oakland, 1982.

T.L. Dadayan, Bending moments influence on shear strength of reinforced concrete elements. Proceedings of 3rd International Conference on Contemporary Problems in Architecture and Construction, Beijing, China, November 20-24, 2011, 237–239. Doi: https://doi.org/10.1049/cp.2011.1181

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Published

03/03/2024

How to Cite

Dadayan, T., & Karapetyan, L. (2024). Change of Axial Forces in Layered Rubber–Steel Base Isolators of High-Rise Buildings at Earthquake Impact. Journal of Architectural and Engineering Research, 6, 27–37. https://doi.org/10.54338/27382656-2024.6-004

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Articles