Analysis of Outrigger Structural System for Tall Building Subjected to Lateral Loads

Preeti .M. Nagargoje; Shilpa Kewate

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25-Apr-23

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Analysis of Outrigger Structural System for Tall Building Subjected to Lateral Loads

Author(s):

Preeti .M. Nagargoje , sarswati college of Engineering,kharghar Navi Mumbai; Shilpa Kewate, SCOE Kharghar Navi Mumbai

Keywords:

Outriggers, ETABS, storey drift, lateral displacement

Abstract:

The aim of this paper is to analyze the outrigger structural system for tall building subjected to lateral loads. Due to the urbanization and industrialization metro cities facing the problem of land so that tall buildings are generally preferred in metro cities. When the building increases the height, stiffness is very important criteria which can be reduced sufficiently by providing the outrigger beam between shear wall and outer columns. 40 storey RCC models has been developed and analyzed which is subjected to lateral loads by using ETABS software. The parameters of earthquake and wind load has been defined as per IS 1893 (Part-1): 2002 and IS 875 (Part-3): 1987 respectively. Dynamic analysis has been carried on RCC model without outrigger by using response spectrum method. The Results shows large values for lateral displacement, storey drift, velocity, acceleration, time period and base shear. To minimize the above parameters, four RCC models with single outrigger provided on 10th, 20th, 30th and 40th storey and one without outrigger model has developed and analyzed. The Comparative result show small reductions in above parameters. Therefore new four models has developed with Multioutrigger system (two outriggers) on different storey and analyzed. The comparative results of without outriggers model and Multioutriggers models shows considerable changes in parameters. This paper also have objective to find optimimum positions of Multioutrigger in Rcc model. From the result it is concluded that the provision of Outrigger system is very effective in Minimizing the lateral displacement, storey drift, base shear, acceleration, velocity.