The Impact assessment of shear Wall Position on Plan Irregular Structure Seismic Response

During seismic excitation, the behaviour of regular and irregular shape buildings is totally different. When earthquake hits the building, the damages in building which have lack of symmetry are more severe than regular shape building. The lack of symmetry in a building act as the weakness point during earthquake excitation, so in building damages starts at that point. Building Plans with re-entrant corner forms are a most useful set of building shapes for urban sites, particularly for residential apartments and hotels, which enable large plan areas to be accommodated in relatively compact form, yet still provide a high percentage of perimeter rooms with access to air and light. + -shaped, L-shaped and C- shaped buildings with re-entrant corners are common for school buildings to accommodate spaces for playgrounds and assembly areas. But these configurations pose a great deficiency in the seismic behaviour of the structure. Most of the building codes recognize re-entrant corners as one of the serious irregularities in buildings but no vital recommendations for proper evaluation of these structures yet or incorporation way of retrofit strategies leads to accurate design methods. The objective is to study the seismic behaviour of multi-story buildings having in plan irregularity with re-entrant corners. Main objective is To study the behaviour of multi-storied buildings of height 30m, 45m, 60m having re-entrant corners of two plan areas having plan irregularities about 30% and 36% under static and dynamic load and find out the optimize location of shear wall.