Seismic Analysis of High-Rise Tube in Tube Structures with Different Bracing Conditions

Abstract

Abstract: Tall structures frequently have tubular structures. Frame tube, braced tube, tube in tube, and bundled tube constructions are examples of tubular structures. With a tubular structure, lateral loads can be resisted by designing the building to resemble a hollow cantilever that is perpendicular to the ground. Because they have less storey shear, storey displacement, and storey drift than other tubular systems, tube in tube structures are preferable. According to IS1893:2016 (Part 1), the influence of bracing type and position has been investigated in this study for a 20-story building in zone IV. Seismic metrics for braced and unbraced buildings are compared. The study at the building's corner and centre uses bracing made of angles and tubular sections. Seismic parameters are compared for unbraced and braced building. Angle and tubular section bracing are designed and used for the study at centre and corner of the building. From the study a comparative statement has been made for the use of bracing at different locations of tube in tube building. Comparative analysis will ease the designer to select the proper bracing type and location for high-rise tube in tube buildings.