Performance Assessment of Outrigger System for High Rise Slender Structures

Abstract

High-rise slender structures have become increasingly prevalent in modern urban landscapes due to the demand for efficient land use and sustainable development. However, these tall and slender buildings are susceptible to various structural challenges, including wind-induced vibrations and lateral deformations. To mitigate these issues and ensure the safety and comfort of occupants, outrigger systems have emerged as a popular structural solution. Through a thorough examination of their structural performance, the outrigger systems used in high-rise, slender structures are examined in this study to determine how they behave and how successful they are. In this way, the design base shear for the entire structure is calculated and distributed over its height. Response spectrum analysis employs eigen value analysis to identify natural frequencies and mode shapes. While time history analysis is a method for figuring out the precise reaction of a structure as a function of time, it is used to compute the peak response. The equation of motion is typically numerically integrated step by step to calculate the response history. This paper explores the impact of earthquakes on outrigger systems in high-rise slender structures. Outrigger systems, which typically consist of horizontal beams connecting the core and the perimeter of the building, play a crucial role in mitigating the effects of seismic activity. These systems provide stiffness and strength to the structure, limiting lateral sway and reducing damage during an earthquake. This paper innovative technologies and construction techniques that enhance the earthquake resilience of outrigger systems. This includes the use of advanced materials, base isolators, and dampers to improve the performance of high-rise slender structures during seismic events.