Comparative seismic study of G+10 building with and without floating column
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Date
2019-08
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
In present scenario buildings with Floating Column is a typical feature in the modern multi-storey construction in urban India. Such features are highly undesirable in building built in seismically active areas. The behavior of a building during earthquakes depends on its shape and size which arise due to architectural extravaganzas and result to re-entrant corners at which load is disturbed requiring sharp bends while the earthquake forces are carried to the ground. The earthquake forces developed at different stories in building need to be brought down vertically to the ground by the shortest path and if any deviation or discontinuity in this load transfer path occurs can result in poor performance of the structure. In case of floating column, shear is induced to overturning forces to another resting element at lower level. This imposition of overturning forces overwhelms the columns of lower level through connecting elements. Therefore the most critical region of damage is the connecting element (link between discontinuous columns to lower level column) and lower level columns. Therefore, the primary concern in load path irregularity is the strength of lower level columns and strength of the connecting beams that support the load of discontinuous frame. This study highlights the importance of explicitly recognizing the analysis of multistorey buildings with and without the presence of the floating column. A residential building comprising of G+10 storeys have been selected for carrying out the project work. The Response Spectrum Analysis is carried out on the entire project mathematical 3D model using the software ETABS and the comparison of these models on the basis of various parameters like displacements, storey shear, overturning moments, storey drift and stiffness are been presented. This will help us to find the various analytical properties of the structure and it may also have a very systematic and economical design for the structure.
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