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題名 | 反共振理論於展示物耐震設計之應用=Application of Anti-Resonant Frequency Theory in Seismic Protection of Exhibition Objects |
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作者 | 姚昭智; 練乃齊; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 10:2 1998.06[民87.06] |
頁次 | 頁307-315 |
分類號 | 441.571 |
關鍵詞 | 反共振頻率; 展示物; 防震措施; 質量比值; Anti-resonant frequency; Exhibition objects; Seismic protection; Mass ratio; |
語文 | 中文(Chinese) |
中文摘要 | 由頻率反應函數尋找結構物的自振頻率是大家所熟悉的,但頻率反應函數不僅只 能表現自振頻率,本文探討頻率反應函數另一特徵,即反共振頻率,及其於非結構物,如博 物館展示物等可視為單自由度物體者,之防震適用性,對大部份的建築結構物而言,各樓板 的反共振頻率值可由理論推導而得,由此可藉調整非結構物的自振頻率至樓板的反共振頻率 處,做為一種防震措施。經二個地震記錄作用下的樓板反應譜證實,當非結構物的自振頻率 調整至支撐樓板的反共振頻率時,確可使非結構物的反應為反應譜上局部最小值。本文亦探 討展示物與樓板質量對反共振頻率防震措施設計的影響,並提出其適用的建議。 |
英文摘要 | By system identification of the vibration of a structure, the resonant frequencies can be found from transfer functions. In reality, there are more information contained in a transfer function than just the resonant frequencies. This paper discusses the application of another property in the transfer function, i.e., the anti-resonant frequency (ARF), and its application to the earthquake protection of nonstructural elements, especially those that can be idealized as a SDOF system, such as museum artifacts. For building structures, derivation of ARF is demonstrated in this paper. By tuning their natural frequencies to ARF, non-structural elements can be protected from earthquake damages. As verified through the floor response spectrum of a structure under two different earthquake motions, the response of a SDOF system on different floors of the structure can be shown to exhibit small vibration if its natural frequency is tuned to ARF of the supporting floor. Further analysis on the influence of mass ratio between nonstructural elements to the supporting floor has revealed a certain rule of thumb concerning the usage of ARF in seismic application. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。