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中文標題: 智慧型黏性阻尼器之研究開發(I)
英文標題: Smart Viscous Damper Research and Development Project (I)
編號: NCREE-11-031
語言: 中文
編輯:
媒體型式: 紙本
作者:
葉芳耀   張國鎮   陳宗?   游忠翰   
中文摘要: 台灣位處環太平洋地震帶,地震發生次數相當頻繁,亦飽受不少強烈
地震之威脅。耐震設計理念中考慮結構物的韌性、隔震及消能系統,以達
小震不壞、中震可修及大震不倒之目標。然而目前的被動控制系統,只能
依照耐震設計需求提供單一的設計阻尼係數,無法完全滿足結構物於中小
度地震、設計地震與最大考量地震之耐震性能需求。雖然目前主動控制系
統可利用外加能量輸入,及時改變阻尼器的物理參數(勁度、阻尼係數等),
以精準地控制結構物的行為。但是主動控制需要消耗的能量非常龐大,成
本過高不符經濟效益。基於上述種種因素,本計畫之目的為開發一種新式
智慧型黏性阻尼器,並提出一套適用於結構物耐震性能提升之分析程序與
設計方法,使結構物在最經濟之成本考量下,儘可能滿足中小度地震、設
計地震與最大考量地震之耐震性能需求,並以縮尺結構物進行試驗驗證。
本計畫主要工作項目包括:智慧型黏性阻尼器文獻蒐集;智慧型黏性阻尼
器開發與特性量測;結構物耐震性能分析程序與設計方法開發;縮尺含智
慧型粘性阻尼器結構物試驗驗證。
英文摘要: A significant number of researchers are convinced that the structural response could be reduced appropriately by installing damper devices. However, the damper deployed on buildings or bridges are generally designed only for the specific structural system under certain loading conditions. As a result, several researchers have developed the adjustable passive damper in recent years [Wereley et al., 2004; Dimock et al. 2002]. Electro rheological dampers (ER dampers) and magneto rheological dampers (MR dampers ) are well known the adjustable damper systems, but the durability and the stability of the external power supply needed for ER and MR dampers are doubtable questions for the long-term application during structure service life. Consequently, a new material, shear thickening fluids (STF), which changes its properties according to different loading rate without external power needed are considered to be a good filled material for innovative damper devices [Zhang et al., 2008]. Lee et al. (2002) applied STF to develop the liquid body armor which is bullet proof with flexibility. In this paper it will be shown that the studies of applying STF materials on a conventional viscous damper device by using a simplified piston device and changing the concentration of STF filled to develop an innovative viscous damper which behaviors like the MR damper. In this study, STF samples which were composed of three different sizes of silica nanoparticles (12, 16 and 40 nm) suspended in three types of solvent (polypropylene glycol, PPG) were fabricated in the laboratory. The shear properties of STF samples under the steady state and the oscillatory state were tested separately by using a rheometer. Furthermore, a prototype STF damper was developed and tested with preliminary performance experiments, followed by analytical models studied. Besides, hysteretic loops of the STF damper developed under various loading conditions were observed. The result shows the smart STF damper proposed in this paper and indicates that it might have a good potential in practical engineering applications.
關鍵字: 奈米粒子、剪切增稠(減稀)流體、智慧型黏性阻尼器
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