| 姓名 | 許植甯(Chih-Ning Hsu) | 電子郵件信箱 | E-mail 資料不公開 | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 93學年第1學期 | |
| 論文名稱(中) | 台中都會區卵礫石層地盤反應分析 | |||
| 論文名稱(英) | A Preliminary Analysis on the Seismic Response of Taichung Gravel Formation | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外都兩年後公開 | |
| 論文語文/頁數 | 中文/129 | |||
| 摘要(中) | 中文摘要 台中都會區為沉積盆地地形，主要土層為卵礫石層，厚達百米以上；因沉積盆地之主要特徵在於地層變異性很大，且會沉積較基岩(base rock)軟弱之土壤，易造成折射波之聚焦和表面波之生成及放大。惟921地震時，依據中央氣象局(1999)的資料顯示，霧峰國小的東西向地表最大加速度高達0.774g，但中興大學的東西向地表最大加速度只有0.367g；卵礫石層之衰減現象遠大於放大現象，使得衰減現象成為卵礫石層受震時之重要特性。 本研究目的為建立一個應用在卵礫石層地盤反應分析之分析流程；利用一維波傳理論(SHAKE 91)及二維有限差分法(FLAC 4.0)兩種分析軟體進行地盤反應分析，並探討二種分析軟體分析結果之差異性及適用性；探討在不同之基盤深度、動態參數及靜態參數下，何者對卵礫石層地盤反應分析有著主要或次要之影響，在卵礫石層耐震設計上提供實務應用之參考。 本研究結果顯示：(1)FLAC 4.0分析軟體較SHAKE 91分析軟體能呈現出卵礫石層之消能作用，且更適用在台中都會區卵礫石層地盤反應分析上。(2)卵礫石層為一堅硬之短週期地盤，且FLAC 4.0程式求得之最大週期0.33秒較接近測站紀錄0.47秒。(3)剪力模數值愈高者所得之地盤反應結果愈小；阻尼比愈高者所得之地盤反應結果亦愈小，且阻尼比值較剪力模數值對地盤反應結果之影響更大。(4)李仁森(2001)大型反覆單剪試驗所求得之剪力模數及阻尼比曲線進行分析其結果較接近測站記錄。(5)靜態參數中，土壤凝聚力c對地盤反應分析之影響最大，且不同場址有不同之土壤參數，故不可使用大區域為範圍之參數值。(6)動態參數較靜態參數在地盤反應分析上有較大之影響。(7)建立之分析流程應用在不同卵礫石場址之分析，其結果亦為不錯。 | |||
| 摘要(英) | Abstract With the reference to the geological conditions in Taichung areas, its topography was classified as the alluvial gravel formation and main gravel deposit was over 100 m in thickness. Due to the main characteristics of alluvial basin in which weak soil to be deposit easily, it is also apt to easily cause the focus of the refract wave and the formulation and enlarge of the surface wave. When 921 earthquakes, the east-west largest acceleration of the earth's surface of the Wu-Feng elemental school is up to 0.774g, but there is only 0.367g in the east-west largest acceleration of the earth's surface of the National Chung-Shing University. The decay phenomenon in gravel is greater than enlarge phenomenon, thus the decay phenomenon becomes important identity when the gravel formation be shaked by earthquake. it has already been a very important thing. This research purpose is to set up a analysis procedure which uses in the seismic response analysis of gravel formation of Taichung; Utilizing the theory of one-dimensional wave transmission (SHAKE 91) and two-dimensional finite difference method (FLAC 4.0 ) to do seismic response analysis, discussing both difference and suitability from these two kinds of numerical software；It’s needed to find out the mainly influence and the secondary influence from discussing the different depth of the base rock、 the different dynamic parameters and static parameters of gravel deposit. In the reference of the practice response design of gravel formation is able to bear seismic in Taichung. This research result shows: (1) FLAC 4.0 software can present the energy absorbing of gravel formation than SHAKE 91 software, and FLAC 4.0 software is more suitable to apply at the seismic response analysis of gravel formation in Taichung. (2) Gravel formation is a formation of hard and short seismic period, and FLAC 4.0 which gets predominant period (0.33 seconds) is more close to the seismic station which gets records (0.47 seconds). (3) When shear modulus values are higher, the result of seismic response analysis is smaller; When damping values are higher, the result of seismic response analysis is smaller. And damping values are more influence than Shear modulus values in the results of seismic response analysis. (4)Li (2001) cyclic simple shear tests get shear modulus and damping curve which get results more close to the records of seismic station. (5)In the static parameters, it is the most influential that is soil cohesiveness c. And there are different soil parameters in the different field location；Therefore, it can't use soil parameters value of the large range area. (6) The dynamic parameters are greater influence than the static parameters in the seismic response analysis. (7)The analysis procedure which uses in the gravel formation of different field location, its result is also good. | |||
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