A Review on the Development of Outriggers and Introduction to Hybrid Outrigger System on Tall Buildings

John, Neethu Elizabeth; Kamath, Kiran

doi:10.1007/978-981-16-2826-9_5

Cited by 1 publication

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“…The behaviour of hybrid outrigger system was evaluated based on the roof displacement (disp roof ), roof acceleration (acc roof ), base bending moment (BM base ) and absolute maximum inter storey drift ratio (ISD max ) which were considered as the dependent parameters in this study. A preliminary analysis was done for hybrid outrigger system which showed the efficiency of using hybrid outrigger system over conventional and virtual outriggers (John & Kamath, 2022). From those preliminary analysis results, need for a detailed analysis of hybrid outrigger system was required to authenticate its efficiency.…”

Section: Procedures For Parametric Analysismentioning

confidence: 99%

An investigation on optimal outrigger locations for hybrid outrigger system under wind and earthquake excitation

John

Kamath

2022

Asian J Civ Eng

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Outriggers are considered as an effective system to alleviate the responses caused due to the lateral loads on high rise buildings. The concept of hybrid outrigger system which has a conventional and a virtual outrigger at different levels has been proposed. This study analyzes the static and dynamic behaviour of hybrid outrigger system based on stiffness of core, stiffness of outrigger beam and belt wall, length of the outrigger arm, and height of the building as varying parameters, and investigated on optimal positions of hybrid outrigger system under wind and earthquake loads. The dynamic behaviour was evaluated using nonlinear time history analysis, and the static wind and earthquake response using Indian Standard codes. Analytical models of 40, 60 and 80 storeys having building heights of 140 m, 210 m and 280 m, respectively were considered for the parametric study. The optimal positions for hybrid outrigger system were obtained based on the response from absolute maximum inter storey drift ratio (ISDmax), roof displacement (disproof), roof acceleration (accroof) and base bending moment. A performance index criterion was introduced which was utilized to obtain the optimal position of the hybrid outrigger system considering the combined effect of ISDmax, accroof and disproof under each load. The study concludes with a flowchart giving the preliminary recommendations for choosing the optimal position of hybrid outrigger system.

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Section: Procedures For Parametric Analysismentioning

confidence: 99%