| Summary: | 碩士 === 國立臺灣大學 === 土木工程研究所 === 82 === The first part of this study is the investigation of a 2/5
scale model structure with added V.E. dampers . The results
showed that by using the model strain energy method , the
damping ratio of the viscoelastically damped model structure
can be predicted accurately . The dynamic behavior of this
model structure with added V.E. dampers can also be simulated
correctlly using commonly available structural analysis
programs such as SAP90 , ETABS . The half-dampers test of the
model structure was used to study the torsional behavior due to
the unsymmestric stiffness of the structure . The results
showed that the effect of torsion was insignificant . The
second part of this study is examine the test results of the
Beijing full-scale structure with added V.E. dampers . The
results showed that damping ratio of the full-scale
viscoelastically damped structure is equal to the design value
by following the damper design flow chart . The study on
scaling laws shows that we can use the experience learned from
model structure to the full-scale structure without any
significant modification in V.E. damper design. The third part
of this study is to design the dampers and to predict the
dynamic behavior of the I-Lan full-scale structure . From the
predited results, we can see that under general ambient
temperature condition , the energy disspating capacity of V.E.
dampers are very impressive . The study on the effect of
bracing stiffness shows that the best choice of bracing (
conneted to damper ) stiffness is between 30~70 times the
damper stiffness . Finally , the study of torsional behavior
due to unsymmestricl assembled dampers shows that high damping
ratio contributed by the V.E.dampers greatly reduces the effect
of torsional behavior.
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