A Study on Column Discontinuity on Behavior of Structure

The behavior of a multi-storey framed building during strong earthquake motions depends on the distribution of stiffness, mass and strength in both the vertical and horizontal planes of the building. In multistoried framed buildings, damage from earthquake ground motion generally occur at locations of structural weaknesses present in the RC frames. This weaknesses may be created by discontinuities in stiffness, strength or mass between adjacent storeys. Such discontinuities between storeys are often associated with sudden variations in the frame geometry along the height. There are many examples of failure of buildings in past earthquakes due to such vertical discontinuities. A common type of vertical irregularity in building due to column discontinuity provided at specific levels of the structure. This building category is known as the vertically irregular structure. Many investigations have been performed to understand the behavior of irregular structures with column discontinuity.Here for analysis G+5, G+9, and G+13 storey building would be taken with column discontinuity at the various location of the building. Here in building column discontinuity is provided at bottom floor, first floor and middle floor. Non-linear static Pushover analysis is carried out and study the response of structure in terms of story displacement, story drift, and variation of base shear using a SAP2000v15.