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題 名 | 場址相依反應譜比值之研擬=Study of Site Dependent Spectra Ratio |
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作 者 | 陳立言; 陳正興; 黃富國; | 書刊名 | 高苑學報 |
卷 期 | 5:2 1996.08[民85.08] |
頁 次 | 頁209-215 |
分類號 | 440.1 |
關鍵詞 | 場址相依反應譜; 反應譜比值; 正規化周期; |
語 文 | 中文(Chinese) |
中文摘要 | 本文使用單向度波傳理論之分析模型,探討各種土層剖面在人造地震及40個實際地震作用下之反應,並分別比較基盤及地表反應譜與露頭反應譜之比值。由研究結果可以發現,基盤反應譜比值在結構周期等於土層周期處有一谷值,而地表反應譜比值則有一峰值,而且谷值或峰值之大小及形狀均類似,因此可用土層周期作為正規化參數,求得反應譜比值與正規化周期之關係曲線。因該曲線之橫軸為結構周期與土層周期之比值,可反應不同周期地盤之影響,所以本文稱該關係曲線為場址相依反應譜比值。由於該曲線可同時反應地震特性及地盤特性,在結構耐震設計之運用上,將較傳統場址相依反應譜更其代表性。 |
英文摘要 | For engineering design using spectrum methed, it is important to have a site-dependent response spectrum which accounts for the varying characteristics of ground from place to place. In this paper, a simplified model was introduced to correlate the earthquake motions at the soil surface and basement with respect to a given motion on rock outcrop. Based on that, 40 earthquake aceelerograms, the data base for generating the hard-site design response spectrum of Taiwan area, were assigned as the earthquake motions on outcrop to calculate the ratios of spectral amplification at soil surface, and ratios of spectral reduction at basement. Finally, averaged curves were proposed to represent the speetral ratios in terms of the normalized period To/Ts, where To is the fundamental period of a single-degree-of-freedom system and Ts is the fundamental period of ground. |
本系統中英文摘要資訊取自各篇刊載內容。