STATIC PUSHOVER ANALYSIS FOR REGULAR AND IRREGULAR STRUCTURES IN ALL ZONES

Abstract

In many earthquake-prone countries, structures may be suffers to various seismic loads in any stage of structures life. For this situation it is expected that the structures designed will show ductile behaviour under the various loads like vertical loads and lateral loads and also shows a stable behaviour without any major damage. Most of Indian lands behave insecure owing to the vibrations which are caused by the seismic effects. Also, it’s not possible to stop earthquake or vibrations on the structures but it may be controlled by some effective seismic techniques. Pushover analysis is a simply nonlinear analysis to estimate the static and dynamic demand imposed on any structures under earthquake excitation. In now days for design purpose, irregularity in structures is under highly demand. In this paper regular and irregular building structures are taken to study the behaviour during under seismic zone. Here various type highrise buildings are analyzed; behaviour of high rise building during earthquake depends on their structural design. In this study a G+8 rugular structure and multi-storeyed irregular structures are analyzed by nonlinear static pushover analysis. Zone factor for analysis is taken as zone III & zone V. This concerned work all building are designed as per IS 456:2000 and IS1893:2002. The aim of this work is to compare the result of symmetrical and unsymmetrical structure behaviour after applying pushover analysis in behalf of storey drift, storey displacement, base shear and storey shear. Keywords- Pushover analysis, seismic loads, lateral loads, regular and irregular building, nonlinear analysis, storey drift, storey displacement, base shear.