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題 名 | 滑動結構震動臺試驗研究=Shaking-Table Experiments of Sliding Structures |
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作 者 | 王文清; 林明諭; 蔡錦松; | 書刊名 | 高苑學報 |
卷 期 | 6:1 1997.02[民86.02] |
頁 次 | 頁173-178 |
分類號 | 441.2 |
關鍵詞 | 滑動隔震結構; 質量比; 正弦線性變頻外力; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要探討滑動結構受力之振動特性及隔震效能評估。滑動隔震結構藉由摩擦 層界面消能減低上部結構所受地表外力,但因摩擦層之存在,使結構形成不連續現象,因此 其受力行為將迴異於基礎固定結構。為探討滑動結構受震之反應,乃進行模型震動臺試驗, 模型為鋼製單自由度結構,質量比分別為 1/2 及 1/4, 摩擦界面採用二種組合,分別為鐵 弗龍╱鐵弗龍及鐵弗龍╱不�袗�板,其靜摩擦係數分別為 0.22 及 0.25; 承受外力震幅為 0.1g 及 0.025g 及外力頻率為 1.0 ∼ 4.0 Hz 及 0.6 ∼ 4.0Hz。 試驗結果顯示,在滑動 狀態下,並不改變結構本身之自然振動頻率,亦即消能機制是藉由摩擦層阻隔地震能量之傳 入,而非滑移時結構勁度之改變進而增加抗震能力。而在隔震效能上,顯示滑動結構可消減 上部結構之反應可達 80 %以上,若能有效控制滑移量,滑動隔震為一相當有效之隔震裝置 。 |
英文摘要 | This paper presents a study of the structure responses of sliding structure subjected to ground excitation. To observe the response of the sliding structure under ground excitation, shaking-table experiments was conducted. The model using in the experiments is a steel-made one-story structure with mass ratio 1/2 and 1/4. Two kinds of sliding interfaces, teflon/stainless-steel and teflon/teflon, have static friction coefficients of 0.22 and 0.25, respectively. Dynamic loading provided by the shaking table is in the form of linear sinusweep excitation with a frequency range from 1.0 to 4.0 Hz and 0.6 to 6.0 Hz. The amplitudes of the excitation are 0.1 and 0.025g. The results obtain by the experiments show that the natural frequency of structure in sliding remains unchanged comparing to that of fixed-base condition. It was also found that the peak acceleration of structure would be reduced at least 80%. |
本系統中英文摘要資訊取自各篇刊載內容。