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題 名 | 明挖覆蓋隧道受地震作用之結構與土壤互制行為研析=Study on Structure-Soil Interaction of Open-cut Tunnel Subjected to Seismic Excitation |
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作 者 | 宋裕祺; 陳竑瑋; 陳立憲; 何泰源; | 書刊名 | 地工技術 |
卷 期 | 138 2013.12[民102.12] |
頁 次 | 頁69-80 |
專 輯 | 岩盤工程與岩盤數值分析 |
分類號 | 441.9 |
關鍵詞 | 側推分析; 動力歷時分析; 塑性鉸; 明挖覆蓋隧道; OpenSEES; Pushover analysis; Seismic time history analysis; Plastic hinges; Open-cut tunnel; |
語 文 | 中文(Chinese) |
中文摘要 | 考量台灣地震發生頻繁之致災風險,關於地下隧道結構之耐震分析實屬設計重點,故於相關規範多明確揭櫫其行為應考慮結構與土壤之互制效應。然因其互制行為複雜,實務上多採較為保守之強制變位法作為地下隧道受震作用之模擬。本文針對明挖覆蓋之隧道案例,另提二種分析方法解此課題:(1) 將地盤變位透過等值土壤彈簧傳遞至地下結構;進行工程師熟知且簡易之側推分析作為擬靜態非線性模擬;(2) 撰編開放原始碼OpenSEES以建置有限元素模型進行動力歷時分析。最後再比對此二種分析方式之差異與適確性,驗證本研究簡易分析與數值模擬之可行。所得相關成果應可供作地下隧道結構耐震分析之參佐。 |
英文摘要 | Concerning the importance of seismic behavior on underground structure due to more frequent risk of earthquake in Taiwan, soil-structure interaction is required to analyze/design for such situation. Comparing with current conventional method of forced-displacement-analysis to solve this complicated structure-soil interaction in practice, this paper intends to study seismic response of open-cut tunnel with two methods: (1). Simply quasi-static pushover analysis, which is familiar to engineers having a better understanding of structural nonlinearity, was introduced by transferring ground displacement to structure through equivalent soil spring element ; (2). Time history analysis of the finite element model by modifying numerical open source of OpenSEES. The amplification of seismic wave from rock to ground surface as well as structural response of tunnel was conducted. In addition, a simplification model was then proposed and analytical results obtained were compared with those of time history analysis. The result shows the proposed pushover analysis gives engineers not only a straightforward insight of seismic behavior for underground tunnel but also a rapid and appropriate analysis. The result obtained form this paper can benefit engineers in seismic design of practical engineering. |
本系統中英文摘要資訊取自各篇刊載內容。