Abstract
SEISMIC ANALYSIS OF MULTISTORIED BUILDING WITH AND WITHOUT VERTICAL MASS IRREGULARITY
Rashmi S. Patil*, Prof. H. S. Vidyadhar and Dr. S. B. Patil
ABSTRACT
Structures designed for gravity loads, in general, may not be able to safely sustain the effects of horizontal earthquake shaking. Hence, it is necessary to ensure adequacy of the structures against horizontal earthquake effects. In this study, 3D Analytical model of G+15 storeyed buildings have been generated for vertical mass irregularity. Ten models are generated with difference in vertical mass irregularity and steel bracings (angle section 127mm? 95mm?12mm) analysed by using analysis tool ?ETABS Non-linear Version 9.5.0?. The parameters considered in this paper are fundamental time period, base shear and displacement. The analysis is done with two different methods namely linear static Method (Equivalent Static Method) and Linear Dynamic Analysis (Response Spectrum Analysis). In this study, the displacements values are increasing as the irregular mass shifts towards top. The base shear values are considerably high in buildings having vertical mass irregularity and as the vertical mass shifts towards top, base shear decreases.
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