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Journal of Tashkent Institute of Railway Engineers

Abstract

The dynamic reaction of a building to earthquake ground motion is the most critical reason for earthquake actuated damage to structures. The basic concept in seismic isolation is to protect the structure from the damaging effects of an earthquake by introducing a flexible support isolating the building from the shaking ground. Seismic isolation consists of essentially the installation of mechanisms such as isolators which decouple the structure from base. In the present study, the seismic response of the reinforced concrete building, base isolated by lead rubber bearings (LRBs) is compared with the seismic response of the same structure which does not have base isolation system. The main objective is to check effectiveness of base isolation system and to find story displacement, story drift and base shear. A time history analysis is carried out for the 10 storey buildings for El Centro earthquake by using SAP2000 software.

First Page

100

Last Page

105

References

1. A.N.Lin and H.W.Shenton, “Seismic performance of fixed-base and base-isolated steel frames”, ASCE, Vol., 118 No5, ISSN 0733-9399, May, 1992.

2. Dr. Hadi Nasir Ghadhban Al-Maliki, “Analytical behavior of multi-storied building with base isolation subjected to earthquake loading”, Journal of Engineering and Development, Vol. 17, No2, 2013, ISSN 1813-7822.

3. Mehmet A.Komur, “Soft storey effects on the behavior of fixed base and LRB base-isolated reinforced concrete buildings”, Springer, DOI 10.1007/s13369-015-1664-3, 28 April 2015

4. Luis Andrade and John Tuxworth, “Seismic protection of structures with modern base isolation technologies”, Concrete solutions 09, Paper 7a-3.

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