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題名 | 加黏彈性阻尼器橡膠隔震支承之試驗與分析=Test and Analysis of Rubber Bearings with Added Viscoelastic Damper |
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作者 | 張國鎮; 蔡孟豪; 張耀輝; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 9:4 1997.12[民86.12] |
頁次 | 頁581-592 |
分類號 | 441.571 |
關鍵詞 | 橡膠層墊; 結構隔震; 粘彈性阻尼器; Rubber bearings; Isolated structure; Viscoelsctic dampers; |
語文 | 中文(Chinese) |
中文摘要 | 橡膠層墊應用於結構隔震支承上,能有效的延長結構週期,降低結構在地震時的慣性力;粘彈性阻尼器能提高結構系統的阻尼比,得以減低結構在地震或強風下的反應。本文藉由橡膠層墊隔震單元(簡稱BB)和含粘彈性阻尼器之橡膠層墊隔震單元(簡稱RBVD)二種隔震裝置反覆載重實驗之結果,建立其數學分析模型,由所得之模型計算在各不同振動頻率下隔震裝置的水平勁度及複合阻尼比。進而預測隔震橋梁模型在地震時之反應,並和震動臺實驗比較來探討其準確性。研究結果顯示,含粘彈性阻尼器之橡膠層墊隔震單元能有效的增加結構之阻尼比來控制隔震結構的位移;所採用之分析模型可準確的估計RB隔震結構系統及RBVD隔震結構系統的儲存勁度和阻尼比,從隔震橋梁模型之動力分析的位移歷時和實驗值之比較,其預測結果相當良好。 |
英文摘要 | It has been widely accepted that a seismically isolated structure is effective in reducing the inertia force under earthquake ground motions. The lateral displacements, however, will be increased due to the larger period of the seismic isolation system. Viscoelastic dampers have been shown to be an effective energy dissipation devices in reducing seismic structural response. this paper is concerned with the displacement control of seismically isolated bridges using viscoelastic dampers. The results of cyclic loading tests of rubber bearings (RB) and rubber bearings with added viscoelastic dampers (RBVD) are first described. Analytical models for predicting the storage stiffness and composite damping ratio of the system are then established. comparisons between the dynamic analysis and the results of shaking table tests of a seismically isolated bridge model are also made. It has been shown that the RBVD isolation unit can effectively control the structural displacement through increasing the damping of the structure. Seismic response of bridge structure with RBVD isolation bearings can also be accurately predicted by the proposed models. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。