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HUAN, SUI CHUNG
Displacement Semi-active Hydraulic Damper
|摘要:||現在耐震設計的觀念為增加結構的阻尼，靠結構物的動態遲滯廻圈吸收地震力輸入結構的能量，使結構物不產生破壞，避免使用結構的韌性。本研究針對位移相依半主動油壓阻尼器( Displacement Semi-active Hydraulic Damper, DSHD ) 做數值模擬，探討其消能特性及其元件之受力行為。
Nowadays the idea of earthquake resistance is to increase the structural damping ratio. Instead of employing the structural ductility, it uses the dynamic hysteresis of structure to absorb the energy input from earthquake into the structure, making the structure not damaged. This study is numerically simulating the Displacement Semi-active Hydraulic Damper (DSHD), in an attempt to find out its energy dissipation characteristics and the load bearing behavior of its elements. Generally, the thesis is divided into the following five chapters: Introduction; Brief Description of DSHD; Deduction of Analytical Theory; Data Analysis; Conclusion & Development. In the Chapter “Deduction of Analytical Theory”, a vibration system at the single degree of freedom has been used to simulate the structure equipped with DSHD, and Duhamel's Integral been applied to find out the movement models of the structure and the load bearing behavior of its elements at various stages. In the Chapter “Data Analysis”, as DSHD changes the dynamic characteristics of the structure, resonance forms respectively occurred in the initial and later periods of vibration have been reviewed. From the analysis it is found that DSHD has good energy dissipation characteristics in regard to the resonance in the initial period. However, as to the resonance in the later period, performance of such an energy dissipation shall be subject to the brace's strength. Under the condition that there is no relief, DSHD has excellent adaptability. Nevertheless, when it comes to the condition of relief, DSHD shows no adaptability. In this case, the control thereof depends on the brace's strength. The more the brace's strength is, the better its control is. In this way, it is not easier for DSHD to enter into the stage of relief, thus becoming more adaptable to the external force.
|Appears in Collections:||土木工程學系所|
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