Inelastic Effects of Biaxial Excitation on Geometrically Asymmetric Plan Building with Biaxial Eccentricity
Nishant Kumar K.1, Rajul K. Gajjar2
1Nishant Kumar K, Applied. Mechanics, L.D. College of Engineering, Ahmedabad, India.
2Rajul K. Gajjar, G.E.C. Gandhinagar, India.
Manuscript received on March 18, 2013. | Revised Manuscript received on April 15, 2013. | Manuscript published on April 30, 2013. | PP: 530-533 | Volume-2, Issue-4, April 2013. | Retrieval Number: D1515042413/2013©BEIESP
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Abstract: Seismic analysis is generally performed by creating a structural model which is excited with forces in two orthogonal directions separately i.e. they are subjected to uniaxial excitation. But an actual earthquake will have its effect in both the directions simultaneously. Limited research has been carried out on effect of such biaxial excitation on two way geometrically asymmetric plan having biaxial eccentricity. This paper deals with the inelastic effect of biaxial excitation on non-linear performance of geometrically two way asymmetric multi-storey buildings with biaxial eccentricity using various time-histories. The angle of incidence of earthquake forces will be varying between 0 to 360 degrees. The building, having of L-shaped plan with eccentricity along each of x and y directions, has been studied. Time history analysis has been carried out using SAP2000 after validating a preliminary model with experimental results available in reference literature.
Keywords: Biaixial excitation, Multi-storey building, geometrically asymmetrical plan, Inelastic effects.