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Seismic Analysis of Medium Rise Open Ground Storey Framed Building by Response Spectrum Analysis Method

Author(s):

R. Suresh , ANNAMACHARYA INISTITUTE OF TECHNOLOGY AND SCIENCES,TIRUPATI

Keywords:

Open Ground Storey Building, Soft Storey, Bare Frame, ETABS, Equivalent Diagonal Strut Approach, Response Spectrum Analysis

Abstract

The present study primarily focuses on the construct of Open Ground Storey (OGS) building. The collapse mechanism of such style of building is preponderantly owing to the formation of soft- storey behavior within the ground storey of this kind of building the IS 1893 code was revised in 2002, Incorporating new recommendations to handle OGS Frame buildings. in line with this clause 7.10.3(a) of a seismic code states: "The columns and beams of the soft-storey area unit to be designed for the multiplication factor of 2.5 times the structure shears and moments calculated foer seismic loads of bare frame". The given multiplication factor (MF) of 2.5, applicable for all OGS framed buildings, However as knowledgeable by the engineer during the design, MF of 2.5 in not realistic for low and medium rise buildings. This calls for assessment and review of the code suggested multiplication factor for low rise and medium rise Open Ground Storey buildings. The objective of the paper is to check the applicability of the multiplication factor of2.5 within the seismic Analysis of a medium rise open ground storey building. A RC framed building (G+9) with open ground strorey Placed in Bhuj (seismic Zone-V)is thought about for this study. This building is analyzed for 2 different cases by response spectrum analysis method (a) considering infill strength and stiffness (open ground storey), (b) Not considering infill strength and stiffness (Bare frame). Infill Stiffness was created in ETABS by using Equivalent Diagonal Strut approach. ETABS software is used for Structural modelling and Response spectrum analysis. Analysis is carried out for these models and results were compared.

Other Details

Paper ID: IJSRDV5I100008
Published in: Volume : 5, Issue : 10
Publication Date: 01/01/2018
Page(s): 4-6

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