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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/69034

    Title: 單站地動預估式建立及場址特定地震危害度分析;Single-station Ground Motion Prediction Equation and Site-specific Seismic Hazard Analysis
    Authors: 高嘉謙;Gao,Jia-cian
    Contributors: 應用地質研究所
    Keywords: 單站地動預估式;強地動衰減式;場址特定地震危害度分析;場址特性地動預估式
    Date: 2015-07-23
    Issue Date: 2015-09-23 15:11:49 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 台灣地震頻繁,重要工程如核電廠及大型水庫,會進行個案的地震評估,擬定設計地震參數,此技術稱為地震危害度分析(seismic hazard analyses)。分析過程須評估震源規模、震源距離及工址震度大小,其中震源釋放地震波隨距離傳遞至工址之震度預測關係式或稱地動預估式(ground motion prediction equation,GMPE)研究尤為重要。過去的危害度分析所使用的地動預估式是以全區域內多個測站記錄到多個不同震源的強地動紀錄所建立的,包含過多的地動值變異性,會造成危害度過估。
    ;Due to frequent earthquakes in Taiwan, Probabilistic seismic hazard analysis (PSHA) is a common approach to evaluate potential earthquake motions at sites of critical facilities such a nuclear power plant and dams. It includes the estimation of the earthquake magnitude and distance of source, and earthquake intensity at a site. Ground motion prediction equation (GMPE) reflects the fact that the amplitude of the ground-motion increases with earthquake magnitude and decreases with propagation distance. Modern GMPEs are based on datasets of ground-motion parameters recorded at multiple stations and different earthquakes in various source regions. It causes excessive variability and leads to increase seismic hazard estimates.
    In the present study, only strong-motion data record at a site is selected to establish a GMPE. We processed strong-motion data from TSMIP in Taiwan which used these data to establish GMPEs. A total of 30602 records are selected and are used to accomplish the regression analysis of a regional GMPE in the first step. Then, 9 stations are selected to complele a single-station GMPE, respectively. The results reveal that the sigma of the regional GMPE is 0.626 in ln unit and the sigma of single-station GMPE is ranging 0.416 to 0.567. The single-station sigma is about 9% to 33% reduction from the regional one. When PSHA is performed by adopting the single-station sigma, the hazard is 11% to 48% smaller then that regional sigma is used. If source zones are further involved in GMPEs, the sigma of single-station GMPEs can reduced 16% to 36% relative to regional GMPE′s. It is expected to further reduce the result of seismic hazard analysis.
    Appears in Collections:[應用地質研究所] 博碩士論文

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