多孔材質諧調液體阻尼器應用於結構之穩態特性分析

Abstract

隨著建築技術革新與環保意識的興起，兼具經濟效益與永續價值之液體阻尼器逐漸受到重視。本文係以裝置不鏽鋼組之多孔材質諧調液體阻尼器進行研究，實驗設計基於質量阻尼器穩態簡諧理論與液體阻尼器之等效模型，透過於單自由度結構物上放置液體阻尼器，並使用振動台輸出不同頻率之簡諧外力，以獲取結構系統穩態簡諧反應，通過比較系統與水槽內液體之動力行為得出最佳阻尼設計，最後運用地震歷時模擬實際地表振盪，依據結構系統承受地震外力時，結構最大位移與槽內液體作用於壁面之衝擊力，分析不同阻尼器之特性及成效。實驗結果顯示，使用窄線徑之多孔材質諧調液體阻尼器能夠有效的抑制液體激盪，在頻率域上比起一般液體阻尼器具有更好的諧調性，使得結構承受地震外力侵擾時，有較佳的制震成效。

With the advancement of building technology and the rise of environmental awareness, liquid dampers are gradually gaining attention. The Tuned Liquid Dampers with stainless metal was investigated in this thesis. The experiment design was based on the steady-state harmonic theory of mass dampers and the liquid dampers equivalent model.Experimentally, applying the harmonic excitation with different frequencies to the single-degree-of-freedom structure by shaking table. Comparing the dynamic behavior of the structure system by steady-state harmonic response and the characteristic of liquid in the tank, the optimal damping design was determined. Finally, using earthquake to simulate the actual ground oscillations. Based on the maximum displacement of the structure and the liquid impact force exerted on the tank, analyzing the characteristics and effectiveness of different dampers design. According to the experimental results, using the narrow line diameter of porous media could effectively suppress the sloshing behavior. Therefore,the Tuned Liquid Damper with Porous Media compared to other liquid dampers could exhibit better tuned properties in the frequency domain. When the structure was subjected to seismic forces, it would have improved seismic damping effects.