A PARAMETRIC STUDY OF MULTY- STOREY R/C BUILDINGS WITH HORIZONTAL IRREGULARITY

Abstract

In designing the multistoried buildings, irregularity in structures is inevitable due to the functional requirement of the buildings. In the present paper horizontally irregular buildings are analyzed for their stability. Multistory horizontally irregular buildings, as described in IS 1893:2002, were modeled in program STAAD.pro. Irregular plan like L-shape, H-shape and U-shape are considered for study. Each building is raised 20 storeys high. Assessment is done on the basis of lateral length ratio for each shape. Buildings are analyzed for Dead loads, Live loads and Wind loads are set as described in IS 875 part 1, 2 and 3 respectively. Earthquake load is set as per IS 1893: 2002. Combinations of loads are taken as per the relevant Indian Standard codes. Parameters like internal forces and roof displacement are used for the assessment. Results are plotted for internal forces of critical members and roof displacements versus lateral length ratios for different shapes.