Effect of VE damper properties on eismic Behavior of Viscoelastically Damped Structures
Date Issued
2009
Date
2009
Author(s)
Lin, Jui - Mien
Abstract
This thesis reviews and compares various types of panel-type viscoelastic (VE) dampers, and the seismic performances of structure with these dampers were studied through a series of experimental tests. A summary on the experimental and analytical study of panel-type VE dampers would be included in the study. Cyclic loading tests and shaking table tests of panel-type VE dampers were carried out at the National Center for Research on Earthquake Engineering (NCREE). Under the cyclic loading tests, the full scaled panel-type VE dampers were used to study the force-displacement hysteresis behavior. Shaking table rests had been carried out on a 2/5 scale three story steel frame with panel-type VE dampers. Ground motions records such as the EL Centro, Capitola, Kobe, Newhall, Chi-Chi and three artificial earthquake time histories were used as the input ground motions for the shaking table tests. It can be concluded that the panel-type VE dampers are effective in reducing seismic vibrations of structures. The effectiveness of VE dampers does depend on the environmental temperature, vibration frequency and shear strain. Base of the experimental and analytical studies show that the seismic performance of panel-type VE dampers was also depend on the bending stiffness of the connect beams. Results of this study may be used in practical application of seismic resistant design of structures with panel-type VE dampers. Results from this study suggest that the bending stiffness of the connect beams would be stiffened enough to ensure the well action of the panel-type VE dampers. Finally, this study provides a revised equation for determining the damping ratio of the panel-type VE dampers considering the rotation of the connect beam, and the analysis results would be a reference for application of structures with panel-type VE dampers.
Subjects
the seismic performances of structure
cyclic loading tests
shaking table tests
environmental temperature
vibration frequency and shear strain .
Type
thesis
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