The Optimum Location of Lift Core Wall for Flat Slab and Conventional Beam System Using Generated Response Spectra

Abstract

The performance based seismic analysis has become widespread, growing awareness is being set to improve structural recital throughout seismic actions. Increased frequency and magnitude of seismic waves fetching a requisite of more earth quake resistant structures comprising shear wall and frames. The study considers field evidence on probable structural effects of strong ground movements. Shear wall is the best way to control deflection during earthquake, but it interferes with architecture and feasibility. To eliminate this discrepancy, lift core wall analysis is presented in this paper. Reinforced concrete coupled lift core wall with open sections structure is a resourceful seismic improved structural method. It has huge lateral stiffness and strength and can afford good control of seismic hazards of buildings under earthquake loads. In this framework of probabilistic seismic hazard analysis, the ideal approach for obtaining the maximum ground movements is in sense of acceleration, velocity, displacement which is scaled to 15 sec. Based on extensive theoretical study on characteristics of seismic ground response, improved response spectral values are proposed in this paper for medium soil site conditions. The enlargement of acceleration based approaches for consideration and design has formed the need for reliable/ feasible acceleration response spectra for a extensive sort of response periods and damping ratio to defeat few correlations in IS 1893-2002(part I) code. The study reviews comparative evolutions
of dynamic analysis of flat slab system and conventional beam system in reinforced concrete buildings of G+10 storey
with most favorable locations of lift core wall by considering case study of Indian earthquakes, response spectrum is
generated for the damping ratio of 5% with the period 4 sec with an increment of 0.05sec. The consequences emphasize on the structural behavior of multi storey buildings of symmetric and asymmetric configuration/ models by 3D modeling using E-Tabs Software in the terms of storey displacement, storey drift, storey stiffness, time period and frequency. Conclusions obtained will help in identifying the optimum location of lift core wall that will help in achieving the earthquake performance objective.