Comparative Effectiveness of Equivalent Static Analysis & Response Spectrum Analysis in Extreme Seismic Zones

Abstract

Earthquake is one of the horrible natural disasters. With the considerable developments in the constructional science, the experts have been able to find out the factor forces that cause earthquakes the damage and destructions in different types of buildings, including residential and commercial buildings, caused by earthquake are of high importance and need to be considered. The damage caused by earthquakes in multi-story buildings is usually in the weak points of the building, which is caused by Strength and changes in stiffness. this paper deal with two methods of analyze, linear static analysis (Equivalent Static Analysis) and linear dynamic analysis (Response Spectrum Analysis) on three different height structures(5-Storey, 10-Storey, 15-Storey) with regular plan in two various seismic zones (IV, V) as per IS1893-2016 and compared parameters, max story displacement, max drift ratio, base shear, max axial force in column, max bending moment in column and fundamental time period from the effect of two analysis methods, using ETABS software. After the analysis, these conclusions were made:Effect of equivalent static analysis in both seismic zones IV, V in Max Story Displacement is more than response spectrum analysis, 36% in 15 Storey building, 38% in 10 Storey building and 34% in 5 Storey building. Fundamental Time Period is equal in equivalent static analysis and response spectrum analysis in both seismic zones and with the 5 storey gap between each buildings time period, 9.5% less from 15 storey to 10 storey and 29% less from 10 storey to 5 storey. Effect of equivalent static analysis in both seismic zones at Max Drift Ratio 27%, 33%, 30% in (15,10,5) storeys buildings is more than response spectrum analysis. In general, it can be said that the values coming from the all parameters in equivalent static analysis are to most of the values of response spectrum analysis.