Comparative Analysis of Responses of a Plane Building, with Outriggers and Water Tank as Tuned Liquid Damper

The Tuned Liquid Damper (TLD) is a passive supplemental damping device which can be used for effective mitigation of wind and earthquake induced responses. The use of TLDs in low to medium rise reinforced concrete (RC) buildings is a less explored area and needs to be investigated. The outrigger and belt truss system are commonly used as one of the structural system to effectively control the excessive drift due to lateral load, so that, during small or medium lateral load due to either wind or earthquake load, the risk of structural and non-structural damage can be minimized. For high-rise buildings, particularly in seismic active zone or wind load dominant, this system can be chosen as an appropriate structure. An outrigger is a stiff beam that connects the shear walls to exterior columns. When the structure is subjected to lateral forces. During the last three decades, numerous studies have been carried out on the analysis and behavior of outrigger structures. Studies have shown that a tuned liquid damper (TLD) is effective in controlling the response of a structure to small amplitude and narrow-banded motions. But when these two are combined it may give further reduction in response of building. This work presents the working of water as tune mass damper with outriggers at different levels. TLDs have been mounted with outrigger on the roof of the building model and two intermediate stories, the response of the building without TLD and with TLD using outriggers and without outriggers have been carried out. The response of building was analyzed in terms of displacement, base shear and over turning moments at all stories and stresses in outriggers using Csi ETABS with application of wind and seismic loads separately. It has been noticed that providing the combination of TLD and Outriggers has very great impact of 65%, 3%,and 67% decrease on Storey displacements, Overturning moments, Base shear. It has been found that Outriggers and TLD can control the displacement of high rise building model satisfactorily. Also, TLDs at different heights gives better performance in reducing the structural response.