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Earthquake vibration control of structures using hybrid mass liquid damper

DSpace at IIT Bombay

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Title Earthquake vibration control of structures using hybrid mass liquid damper
 
Creator BANERJI, P
SAMANTA, A
 
Subject NUTATION DAMPER
SLOSHING DAMPER
TLD
EXCITATION
MOTION
MODEL
Earthquake response
Energy dissipation
Harmonic motion
Liquid sloshing
Passive device
Tuned liquid damper
Hybrid mass liquid damper
Vibration control
 
Description A tuned liquid damper (TLD) is a passive vibration control device consisting of a rigid tank filled with water that relies on the sloshing of water inside it to dissipate energy. In a standard TLD configuration the TLD is connected rigidly to the top of the building structure. Earlier research has shown that the TLD is more effective when its base acceleration amplitude is larger, as it dissipates more energy through increased sloshing. This characteristic has been utilized to design this alternate TLD configuration. In this alternate TLD configuration, the TLD is rigidly attached to a secondary mass that is attached to the primary structure through a spring system. This alternate configuration is, thus, defined as a hybrid mass liquid damper (HMLD). For particular values of the secondary spring's flexibility, the motion of the secondary structure is in phase with that of the primary structure and the TLD base is subjected to a large amplitude acceleration that increases its effectiveness. It should be noted that when the secondary spring is rigid, the alternate and standard TLD configurations are identical for very small values of the secondary mass. His seen that, for a given structure with HMLD there exists an optimum value of the secondary spring's stiffness for which the HMLD effectiveness is maximum. An optimally designed HMLD configuration is shown to be more effective as a control device than the standard TLD configuration for both harmonic and broad-band earthquake motions. (C) 2011 Elsevier Ltd. All rights reserved.
 
Publisher ELSEVIER SCI LTD
 
Date 2012-06-26T06:41:23Z
2012-06-26T06:41:23Z
2011
 
Type Article
 
Identifier ENGINEERING STRUCTURES,33(4)1291-1301
0141-0296
http://dx.doi.org/10.1016/j.engstruct.2011.01.006
http://dspace.library.iitb.ac.in/jspui/handle/100/14063
 
Language English