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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/5619


    Title: 整合性應力波傳法評估場址頻率特性之研究;Study of Site Frequency Characteristics with Integrated Stress Wave Propagation Method
    Authors: 張麟軍;Lin-Chun Chang
    Contributors: 應用地質研究所
    Keywords: 應力波傳法;表面波頻譜法;衝擊反應法;非破壞檢測;速度構造;NDT;IR;SASW;Stress Wave Propagation Method;Velocity Structure
    Date: 2002-05-21
    Issue Date: 2009-09-22 09:58:16 (UTC+8)
    Publisher: 國立中央大學圖書館
    Abstract: 論文內容提要: 地震工程相關之分析與設計,如強地動預估、場址分類、土壤液化評估等,皆需先評估土層之速度構造(包含剪力波速、土層厚度、剪力模數等),而評估速度構造之方式,則以有無鑽井分為破壞性及非破壞性,其中非破壞性之方式,因快速、經濟且準確,逐漸被受到重視及應用,本研究即就其中之表面波頻譜法(SASW)及衝擊反應法(IR)作一整合之可行性探討。目前以表面波頻譜法分析土層之速度構造,對於表層速度及厚度等參數尚有相當之改進空間,若能整合衝擊反應法對上述參數作更有效之評估,將可使分析結果之準確度大為提高。影響土層系統中波傳行為之參數包括各層之剪力波速、厚度、密度、阻尼比及柏松比等,而各波傳法應對不同參數有其相對之高低敏感度,本研究將以數值模擬之方式探討當土壤參數改變時,各波傳法之反應曲線有何改變,若能有效辨別各波傳法對何參數之敏感度最佳,即可以其優點作為整合之依據。本研究將以現地試驗及波傳模擬進行土層之速度構造評估,試驗場址將以中央大學校園為主,數值模擬則採用柱狀座標之理論波傳解,以場址現地試驗之結果,配合數值模擬之分析,利用試驗曲線及模擬曲線之符合度,建立波速分析之整合模式,以期能準確預估場址之剪力波速構造及相關參數。本研究之分析結果,與他法之結果比較後,均有不錯之吻合度,顯示經整合後之應力波傳法在評估場址速度構造之應用上,有相當程度之可靠度,並對厚度之決定更為準確,若能與鑽探資料及其它非破壞檢測法結合,結果應會更具代表性。 Abstract: The analyzing and design of earthquake engineering, eg. prediction of strong ground motion, site classification, and evaluation of liquefaction potential etc., must evaluate velocity structure first. The Nondestructive testing is quick, economy, and reliable. The purpose of this study was to Integrate with SASW method, and IR method. Presently, the application of SASW on velocity structure still can be improved.There are some problems of SASW method: velocity of first layer, and thickness of each layers. If IR method can improve previous problems, the result may be better. In this study, Numerical simulation method based on wave propagation theory was used to discuss the effect of soil parameters on the behavior of wave propagation. Result showed different sensitivity of each soil parameters on the different methods. In this study, we choose NCU as the main site to proceed the case study. After compared with the result of other method, the result in this study correspond with the result of other method. Moreover, the result of thickness of each layers was better. The result is more representable, if it can Integrate with the drilling datas or other NDT method.
    Appears in Collections:[應用地質研究所] 博碩士論文

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