Comparative and Parametric Analysis of Different Lateral Load Resisting System for Tall Building

Abstract

Globally, high-rise buildings have been developed as a result of advancements in construction technology, the evolution of efficient structural systems, and the scarcity of urban land. In recent years, taller and more slender buildings are being built across the globe with the intention of maximizing rentable space and as means of creating a signature structure in the heart of a city. The design of structural systems generally depends on the availability of the materials, services systems and the usage of the building. In the design of tall building, not only gravitational loading, but also lateral loading caused by wind or earthquakes plays important role. To resist these lateral force, efficient lateral load resisting systems are required. Along with the strength, stiffness of the structure is also important because lateral stiffness requirements for tall structures to resist lateral loads induced by wind or earthquakes governs as the structure’s height increases. In this paper two different types of lateral load resisting system Shear wall frame system and Bracing system have been studied. The objective of the present study is to gain better understanding about the behavior and design of Shear wall frame system and Bracing system, including the impact of lateral loads induced by wind and earthquakes. In this study, a building with 35 m × 50 m plan dimension with Shear wall and Bracing system of 50 story RCC structure is considered in the study under wind and earthquake load. The type of building considered is residential and is located in Ahmedabad (Seismic zone III and basic wind speed 39 m/s). For analysis Response Spectrum analysis in accordance with IS 1893 (Part 1): 2016 is performed for seismic lateral load analysis. For analysis and design purposes, both along and across wind forces in accordance with IS 875 (Part 3): 2015 are considered concurrently. All the models are analyzed and designed in accordance to IS 16700: 2017, IS 875 (Part 3): 2015, IS 1893 (Part 1): 2016, IS 456: 2000, and IS 13920: 2016 using ETABS software. After analysis various parameters like Modal mass participation factor, displacement, storey shear, storey drift and time period are studied and its behavior is understood. Further parametric analysis is carried out to determine the optimum location of shear wall and bracing and comparative study is carried out between both the systems to determine the most efficient and economical system for the construction of G+50 RCC building.