Sayali S. Takale, V. D. Gundakalle, Hemant Sonawadekar
An Open ground storey is the typical and unavoidable feature in modern multi-storey construction in many countries like India. Studies of the building failed in past Earthquake shows that, open ground storey building are most vulnerable. In industrial practice, it is common to ignore the presence of infill wall for analysis of framed building but presence of infill wall alters the behavior of structure. Flexibility of soil also affects the behavior of structure, failing of consideration of effect of soil-structure interaction under-estimates the drift and strength demand in open ground storey column, resulting in incorrect design of building. In present paper, an extensive computational study has been conducted with soil-structure interaction, to find out the behavior of open ground storey building and their seismic vulnerability. Four different models are considered and comparative study is carried out. Infill stiffness is modeled using diagonal strut approach and soil stiffness is calculated as per FEMA. The models are analyzed for earthquake loads by both linear analysis and non-linear analysis by using commercial ETABS software.
Open ground storey, Linear Analysis, Pushover Analysis, Soil-structure interaction.