COMPARATIVE STUDY OF VIBRATION CONTROL OF MULTI STOREY BUILDING WITH AND WITHOUT ISOLATION SYSTEM

Rolling base isolation system provides effective isolation to the structures from seismic base excitations by virtue of its low frictional resistance. Herein, dynamic analysis of flexible-shear type multi-storey building mounted on orthogonally placed elliptical rolling rod base isolation systems subjected to bi-directional components of near-fault earthquake ground motions is presented. The orthogonally placed rods would make it possible to resist the earthquake forces induced in the structure in both the horizontal directions. The curved surface of these elliptical rods has a self-restoring capability due to which the magnitude of peak isolator displacement and residual displacement is reduced. The roughness of the tempered curved surface of the rollers dissipates energy in motion due to frictional damping. The seismic performance of the multi-storey building mounted on the elliptical rolling rod base isolation system is compared with that mounted on the sliding pure-friction and cylindrical rolling rod systems. Parametric studies are conducted to examine the behavior of the building for different superstructure flexibilities, eccentricities of the elliptical rod, and coefficients of friction. It is concluded that the elliptical rolling rod base isolation system is effective in mitigation of damaging effects of the near-fault earthquake ground motions in the multi-storey buildings. Even under the near-fault earthquake ground motions, the base-isolated building mounted on the elliptical rolling rods shows considerable reduction in seismic response. The isolator displacement with the elliptical rolling rod base isolation system is less in comparison to the pure-friction and cylindrical rolling rod systems.

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A comparative study on the smart damping capabilities of cylindrically orthotropic piezoelectric fiber–reinforced composite actuators in vibration control of simply supported/fully clamped isotropic annular plate

Journal of Intelligent Material Systems and Structures ◽

10.1177/1045389x16679291 ◽

2016 ◽

Vol 28 (13) ◽

pp. 1839-1859

Author(s):

A Srinivas Pavan Kumar ◽

Satyajit Panda ◽

Narravula H Reddy

Keyword(s):

Comparative Study ◽

Vibration Control ◽

Annular Plate ◽

Fiber Reinforced ◽

Fiber Reinforced Composite ◽

Simply Supported ◽

Reinforced Composite ◽

Cylindrically Orthotropic ◽

Piezoelectric Fiber

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Roof Isolation System to Reduce the Seismic Response of Buildings: A Preliminary Assessment

Earthquake Spectra ◽

10.1193/1.1586013 ◽

1998 ◽

Vol 14 (3) ◽

pp. 521-532 ◽

Cited By ~ 24

Author(s):

Roberto Villaverde

Keyword(s):

Comparative Study ◽

Detrimental Effect ◽

Earthquake Ground Motion ◽

Vibration Absorber ◽

Preliminary Assessment ◽

Viscous Dampers ◽

Isolation System ◽

Steel Building ◽

Rubber Bearings ◽

Seismic Response Of Buildings

A roof isolation system is proposed as a means to reduce the detrimental effect of earthquakes in buildings. This roof isolation system entails the insertion of flexible laminated rubber bearings between a building's roof and the columns that support it, and the addition of viscous dampers connected between the roof and the rest of the building. The properties and dimensions of the rubber bearings and viscous dampers are selected in a way that makes the roof, bearings, and dampers form a highly damped vibration absorber. Presented also is a comparative study with a simple five-story steel building under a strong earthquake ground motion that is carried out to assess the effectiveness of the proposed system. In this comparative study, it is found that the roof isolation scheme reduces the floor displacements and interstory drifts of the analyzed building by as much as 83 percent. On the basis of these results and in view of its simplicity, it is concluded that the proposed roof isolation system has the potential to become a practical and effective way to reduce earthquake damage in buildings.

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A study on seismic isolation of building used LRB

Challenge Journal of Structural Mechanics ◽

10.20528/cjsmec.2020.02.001 ◽

2020 ◽

Vol 6 (2) ◽

pp. 52

Author(s):

Muhammet Yurdakul ◽

Mehmet Burak Yıldız

Keyword(s):

Seismic Isolation ◽

Base Isolation ◽

Dynamic Loads ◽

Isolation System ◽

Rubber Bearing ◽

Lead Rubber Bearing ◽

Earthquake Design ◽

Base Isolation System ◽

Internal Forces ◽

Storey Building

Base isolation system with lead rubber bearing (LRB) is commonly used to prevent structure against to damage of earthquake. Design of LRB system is detailed in this study. The isolated building with LRB design according to Uniform Building Code (UBC-97) and fixed building were examined. The six-storey building with LRB and fixed building were modelled in SAP2000 with the same dynamic loads. The relative floor displacement and internal forces of the seismic isolated and fixed building are compared. In addition, transverse and longitudinal reinforcement of any axis of seismic isolated and fixed building are compared. Analyse results showed that effectiveness of using seismic isolation system on building. The weight of longitudinal and transverse reinforcement of isolated building is smaller than fixed building about 36%, 40% respectively.

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530 Application of Active Base Isolation System Using Absolute Vibration Control Technology

The Proceedings of the Dynamics & Design Conference ◽

10.1299/jsmedmc.2011._530-1_ ◽

2011 ◽

Vol 2011 (0) ◽

pp. _530-1_-_530-10_

Author(s):

Osamu YOSHIDA ◽

Mitsuru KAGEYAMA ◽

Takeshi SANO ◽

Hideo KATSUMATA ◽

Fumiaki ENDO ◽

...

Keyword(s):

Vibration Control ◽

Base Isolation ◽

Control Technology ◽

Isolation System ◽

Base Isolation System ◽

Active Base

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3A33 Development of an active isolation system using the reference mass of a two DOF system(The 12th International Conference on Motion and Vibration Control)

The Proceedings of the Symposium on the Motion and Vibration Control ◽

10.1299/jsmemovic.2014.12._3a33-1_ ◽

2014 ◽

Vol 2014.12 (0) ◽

pp. _3A33-1_-_3A33-8_

Author(s):

Ryo NAWATA ◽

Katsumi ASADA ◽

Wataru TAMURA ◽

Naoki MARUYAMA

Keyword(s):

Vibration Control ◽

Isolation System ◽

International Conference ◽

Active Isolation

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Modeling and Control Analysis of a 3-PUPU Dual Compliant Parallel Manipulator for Micro Positioning and Active Vibration Isolation

Journal of Dynamic Systems Measurement and Control ◽

10.1115/1.4005036 ◽

2011 ◽

Vol 134 (2) ◽

Cited By ~ 36

Author(s):

Y. Yun ◽

Y. Li

Keyword(s):

Vibration Control ◽

Parallel Manipulator ◽

Vibration Isolation ◽

Active Vibration Control ◽

Parallel Robots ◽

Control Analysis ◽

Isolation System ◽

Wide Range ◽

Active Vibration ◽

Active Vibration Isolation

In recent years, many applications in precision engineering require a careful isolation of the instrument from the vibration sources by adopting active vibration isolation system to achieve a very low remaining vibration level, especially for the very low frequency under 10 Hz vibration signals. This paper presents a 3-PUPU dual parallel manipulator for both rough positioning and active vibration isolation in a wide-range workspace based on our previous research experiences in the systematical modeling and study of parallel robots. The manipulator is designed as a kind of macro/micro hybrid robot. Both the kinematics model for macro motion and dynamics model for micro motion are established by using stiffness equation and the Kane’s method, respectively. An active vibration control strategy is described by using the H2 method. Moreover, numerical simulations on the inverse solution for macro motion, workspace, and the active vibration control effects are performed at the end of this paper.

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