Optimum seismic control systems for vertically irregular buildings. (2022)

• Record Type: Journal Article
• Authors: Wasey, M.A.; Masihuddin Siddiqui, Muhammed; Azeem, M.A.
• Is Part Of: Materials today. Volume 65:Part 2(2022)
• Page Start: 1674
• Page End: 1689
• Publication Date: 2022
• Subjects: Vertical irregularities -- Lead rubber bearing base isolators -- Fluid Viscous Dampers (FVD) -- Non-linear time history analysis; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.04.710
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: This study uses Fluid Viscous dampers (FVD), Base Isolators, Shearwalls to evaluate the response of RC building models. The aim of any structure is to withstand the lateral loads and transfer them to the foundation through its members. Due to the dynamic nature of lateral loads imposed on a structure, causes vibrations in the structure. In the previous studies conducted, only one or two types of vertical irregularities were considered with only one type of seismic control system. In present study vertically irregular structures are analysed using non-linear time history analysis (NLTHA). Five, ten and fifteen storey buildings with each type of vertical irregularities and a regular building are modelled and analysed. All the building models are tested with seismic control systems such as base isolators, fluid viscous dampers and shearwalls to find out the optimum seismic control system for any type of vertical irregularities. These building models are analysed for gravity and seismic forces using ETABS 2017 software, Bhuj (Gujrat, India) earthquake data are considered for seismic analysis which comes under seismic zone-v, with zone factor Z = 0.36. Seismic parameters such as base shear/weight ratio, maximum displacement/height ratio, maximum storey drifts were recorded. Base shear/weight ratio improved in the range of 65% to 99% when base isolators and dampers were used, maximum disp./height ratio improved in the range of 35% to 90% when dampers and shearwalls were used and maximum storey drifts improved in the range of 55% to 91% when base isolators and shearwalls were used. Buildings with base isolators and dampers were more efficient in reducing the effect of an earthquake. Displacements of the buildings were efficiently reduced with the help of a shear wall in the structure.