Dynamic Behavior of Full-Scale Viscoelasticlly Damped Structures

• Main Authors: Hong ,Min-Yung, 洪銘揚
• Other Authors: Chang,K.C.
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/76318560305706802202

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.