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Semi-active stiffness dampers for seismic control of structures

DSpace at IIT Bombay

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Title Semi-active stiffness dampers for seismic control of structures
 
Creator KORI, JG
JANGID, RS
 
Subject of-the-art
response control
isolated buildings
control-systems
structural control
semi-active control
variable stiffness damper
control algorithms
earthquake
 
Description This paper describes the application of semi-active variable stiffness damper (SAVSD) for response control of the seismically excited structure. The SAVSD consists of hydraulic damper connected in the form of bracing in a selected story of frame structure. The SAVSD changes its stiffness depending upon the structural response and accordingly adds the control forces in the structural system. In this paper, the comparative study and the performance of SAVSD under different ratios of damper stiffness to structural story stiffness is presented. The specific objective of this study is to evaluate the optimum value of damper stiffness ratio and its importance in structural response reduction. The optimum stiffness ratio is investigated for the structure subjected to four different types of earthquake ground motions. Here, the switching control law and newly proposed modified switching control law are used and the results are compared with uncontrolled and passive control cases. A numerical study is performed on five and ten-story shear building with different configurations of damper placement. The numerically evaluated optimum parametric values are considered for the analysis of the optimum damper placement in the structure. It is revealed that, the proposed modified switching control law is very effective in reducing the story displacements and inter-story drifts without increasing the top floor accelerations. The numerical results of various analyses indicate that SAVSD shows better performance over the passive dampers in reducing the structural responses.
 
Publisher MULTI SCIENCE PUBL CO LTD
 
Date 2011-08-18T20:29:40Z
2011-12-26T12:55:54Z
2011-12-27T05:43:17Z
2011-08-18T20:29:40Z
2011-12-26T12:55:54Z
2011-12-27T05:43:17Z
2007
 
Type Article
 
Identifier ADVANCES IN STRUCTURAL ENGINEERING, 10(5), 501-524
1369-4332
http://dx.doi.org/10.1260/136943307782417744
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10125
http://hdl.handle.net/10054/10125
 
Language en