Seismic Behaviour of Tall Building Having Twisted Floors with Re-Entrant Corners

Flat slab buildings using shear wall have become common due to significant contribution in lateral stiffness. Especially for taller buildings, the structural configuration using combination of flat slab and shear wall is generally used in multi-storey building. Many researchers have investigated the behaviour of irregular building, but tall structure having floors with imparted angular rotation have not been sufficiently studied yet, especially flat slab systems having twisted floors with re-entrant corners have not been researched over much. Seismic behaviour of the flat slab tall structure having rotated floors at certain angles for different storey with re-entrant corners with different locations of shear walls were studied over various parameters like drift, lateral displacement, contribution factor and drift reduction percentage. The best fit configuration of shear walls over these parameters was analysed. Shear walls when placed at core and re-entrant corners simultaneously performed much better.