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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/1008

    Title: 土石壩受震應變潛能法之整合研究;An Integrated Strain Potential Methodology for Analyzing Seismic Permanent Deformation of Earth Dams
    Authors: 吳嘉賓;Chia-Pin Wu
    Contributors: 土木工程研究所
    Keywords: 土石壩;應變潛能;永久變形;總應力;有效應力;土壤液化;soil liquefaction;effective stress;total stress;permanent deformation;earth dam;strain potential
    Date: 2009-01-16
    Issue Date: 2009-09-18 17:17:48 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 為能得到合理的土石壩震前靜力、受震反應與震後變形分析結果,如何取得代表性的築壩材料土壤參數是其主要關鍵。本研究蒐集國內多座土石壩築壩材料之靜動態特性資料,並從某規劃中土石壩借土區取樣,製作夯實重模試體進行動態特性與動態強度試驗,期望蒐集的靜動態特性資料與動態試驗結果能初步建立台灣土石壩靜動態性質參數資料庫,並提供相關土石壩靜、動態分析之參考依據。 此外,為能合理地估計輾壓式土石壩震損所發生的有限變形,本研究以商業軟體FLAC2D程式為基礎,撰寫一系列相關的FISH副程式,改良Seed等人(1973)的總應力應變潛能分析程序,使單一的FLAC2D程式能簡易且完整地執行傳統繁雜的分析程序,深具實際應用價值。在有效應力分析方面,本研究建議兩種簡易的孔隙水壓激發模式,以分別用於模擬水力淤填式與輾壓式土石壩在地震荷載下之力學行為。最後,根據真實土石壩震害案例的模擬與分析,顯示本研究的各分析方法能獲得尚稱合理之分析成效,可提供土石壩耐震安全評估工作參考使用。 Representative properties of earth dam materials are very important parameters in stress analysis of dam construction and seepage, seismic response analysis and seismic permanent deformations analysis. Therefore, this study first collected soil static and dynamic properties from the reports of safety assessments of major earth dams in Taiwan, and performed a series of dynamic property and strength tests on compacted soils from the borrow areas of a planning earth dam. The collected data and dynamic test results can be used to establish static and dynamic parameter database of earth dam materials in Taiwan. This thesis presents a new integrated procedure to perform earth filling and seepage analysis, dynamic analysis and seismic residual deformation computation for an earth dam by a single program FLAC2D to prevent engineers from using so many different programs adopted in the strain potential methodology that first proposed by H. B. Seed and his group in 1973. All the models and parameters needed in the strain potential methodology were coded into FLAC2D program by FISH language. The procedure also proposes two kinds of simple pore water pressure generation models to analyze seismic responses of hydraulic fill and compacted fill dams in an effective stress manner. Liyutan Dam and Lower San Fernando dam are the two cases used to verify the performances of the proposed procedure. The results of case analyses are reasonable and the numerical simulations are similar to the recorded post-earthquake deformation behavior. This suggests that the proposed integrated procedure is practical and efficient. It can provide engineers an easy way to perform the complicated seismic analysis of earth dam using strain potential methodology.
    Appears in Collections:[土木工程研究所] 博碩士論文

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