黏彈性阻尼器的特性參數
對構架地震下行為之效益研究

黏彈性阻尼器為一種低勁度、高阻尼比的被動消能控制器，可用於大幅提高結構之阻尼比，以降低在強風或地震下結構之動力反應。在過去數年中，關於黏彈性阻尼器其在地震發生時對於結構物的貢獻的相關研究，已經相當豐富。並且也根據相關研究，發展出了相當成熟的阻尼器結構設計方法。本研究為了瞭解壁式黏彈性阻尼器的相關動力參數與其運用於真實結構時可發揮的消能效益，於是在國家地震工程研究中心從事了壁式黏彈性阻尼器反覆循環載重試驗與振動台試驗。反覆循環載重試驗運用了國家地震研究中心的兩套系統：反力牆系統與MATS系統。同時考慮其溫度、頻率與剪應變對於其阻尼器材料性質的影響，最後並經由參數回歸得到其動力參數的經驗公式。在振動台試驗中，我們選用了一勁度較高之2/5縮尺三樓兩垮鋼結構模型，來進行我們的振動台試驗。在結構中我們每層樓設置一黏彈性阻尼器，總共有三組。對試驗結構輸入11筆不同類的地震歷時，分別為EL Cectro、Captiola、 Kobe、Newhall、四組921集集地震與三筆人造地震歷時記錄。探討加壁式黏彈性阻尼器結構其結構阻尼比與動力反應，了解其黏彈性阻尼器對結構所貢獻的阻尼比與減震行為。

關鍵字

被動消能控制器；反覆載重循環試驗；振動台試驗；加速度反應譜；位移反應譜；阻尼係數法。

並列摘要

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.

並列關鍵字

the seismic performances of structure ； cyclic loading tests ； shaking table tests ； environmental temperature ； vibration frequency and shear strain .

參考文獻

[1] M.C. Constantinou, M.D. Symans,(1993), “Experimental Study of Seismic Response of Buildings with Supplemental Fluid Dampers”

[5] Cermak,J.E., Woo, H.G.C, Lai,M.L., Chan,J. and Danielson, S.L.(1993), “Aerodynamic Instability and Damping on a Suspension Roof”, 3rd Asia-Pacific Symposium on Wind Engineering, Hong Kong, Dec. 13-15.

[6] T.T. Soong and G..F. Dargush, “Passive Energy Dissipation System in Structural Engineering” JOHN WILEY & SONS.

[7] Anil K. Chopra, “Dynamics of structures theory and applications to earthquake engineering” PRENTICE HALL.

[10] Yaomin Fu, Kazuhiko Kasai, Member, ASCE, “Comparative Study of Frames Using Viscoelastic and Viscous Dampers”

國際替代計量

黏彈性阻尼器的特性參數對構架地震下行為之效益研究

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