Analytical and Experimental Studies on Seismic Behavior of Structures with Building Mass Dampers
Date Issued
2010
Date
2010
Author(s)
Ao, Wai-Kei
Abstract
Ductility design is rely on large deformation of beams and columns to absorb earthquake energy. Frequently, serious damage of beams and columns cause structures difficult to be repaired. Therefore, more engineers developed the control element that make the transmission path of earthquake force is well known after adding control elements. It also can reduce the input energy and structure vibration, so that the safety and functionality can be ensured.
In this study will perform the control element in structure such as rubber bearing, viscous damper and lead rubber bearing and use Tuned Mass Damper concept to control the structural behavior. The stiffness and damping coefficient of TMD system are provided by isolation bearing and VD. Bearing systems are installed on the top of high story level.
TMD can reduce substructure responses. Isolation system can reduce the superstructure responses. Therefore attempt to use TMD design and change some parameters to gain both advantage. The main design method is performed by Sadek[31] and Villaverde[32]. They proposed the optimum of TMD and mass criteria equation.
Corresponding to the new design concept it is building the numerical model of SAP2000N to prove the effectiveness of itself. After that plan the shaking table test.
On the other hand can adjust the mass ratio of TMD parameter, such as tuning the large mass ratio and matching the optimize design formula. TMD is also applied on the structural building by passive control elements which can reduce the superstructure and substructure response at the same time. So it is using the SAP2000N program to perform the numerical studies and predictions.
Subjects
Tuned Mass Damper
Mid-story isolation
high mode
model coupling effect
linear system
bilinear system
mass ratio
frequency ratio
Type
thesis
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