SEISMIC ANALYSIS OF RCC FRAMED REGULAR AND VERTICAL GEOMETRIC IRREGULAR BUILDING

Abstract

The performance of the multi-storey framed building during the sturdy earthquake motions depends on distribution of mass, stiffness, and strength in the both horizontal and vertical planes of the building. In multi-storey framed buildings, smash up from earthquake ground motion generally initiates at the locations of structural weaknesses present in lateral load resisting frame. In the some cases, these weaknesses may be produced by the discontinuities in stiffness, strength or mass between adjoining storey. Such discontinuities between the storeys are often allied with the sudden variations in frame geometry along height. A common type of the discontinuity is a vertical geometrically irregularity arising from rapid drop of height. This work shows performance & behavior of the regular & vertical geometrically irregular RCC framed structure under seismic motion. Five types of building geometry are taken in this project: one regular frame & four irregular frames. A comparative study is made between all these building configurations ht wise and bay wise. All building frame are modeled & analyzed in software Etabs 2016. Various seismic responses like shear force, bending moment, storey drift & storey displacement is obtained. The seismic analysis is done according to IS 1893: 2002 part (1). Seismic zone IV & medium soil strata are taken for all the cases. The change in the different seismic response is observed along different height.