Parametric Study of Seismic Response Analysis of High Rise Structure

Abstract

High rise structures with complex planning and irregular vertical elevations are trending nowadays. Such high rise structures are more susceptible to seismic forces which are quite devastating and cause a huge loss to human lives and property. Hence it is very important to study the behavior of such structure to help structural engineers to create better earthquake resistant design. The usefulness of the shear walls in the structural planning of the multistory buildings to resist the lateral forces has been recognized long back. Shear walls also dissipates a great amount of energy if detailed properly, however there are many factors such as placement of shear walls, its thickness, aspect ratio, plan of the building which affects the response of the building towards lateral loads. In the present study attempt is made to study the effect of different location of shear walls on the response of the building in terms of time period and maximum displacement. The detailed investigation is carried out for zone II of Seismic zones of India as per IS 1893 (part 1):2016, considering primary loads (dead, live and seismic loads) and their combinations with appropriate load factor. Analysis is carried out in ETABS 2016. Further a case study of a U-shaped plan is carried out, to reduce the torsional irregularity structural wall system with spandrels and seismic joints were provided at certain locations.