Comparative Study by Varying the Number of Outriggers for High Rise Building
Saif Azhar, Amit Pratap Singh
Outrigger System, Equivalent Static Method, Response Spectrum Method, Lateral Displacement, Storey Drift, Time Period
The demand for the high rise buildings has increased in the modern era. The taller and slender buildings are the most vulnerable to lateral loads due to wind and earthquake. Outrigger system proves to be very efficient solution for controlling excessive drift and displacement by increasing stiffness of the high rise building. The location and number of outriggers provided in a structure must be such that the maximum benefit is achieved in the minimum cost. In this paper, a comparative study is presented by changing the number of outriggers along with the belt trusses at the top and mid height levels of 20, 40 and 60 storey structural models. Since from the previous researches it is evident that the optimal location of outrigger system in tall building is at the top and mid height, therefore this location is chosen to increase the number of outriggers along with the belt trusses and the variation in the results in terms of maximum top storey displacement, storey drift and time period are studied by Equivalent Static Method and Response Spectrum Method.