本研究主要探討橋梁遭受地震時之傳遞特性及列車行為，首先確立橋梁之型式以及高鐵之橋梁種類，再藉由模型驗證確立建模之流程與模型之可靠性，模型驗證完後，再利用CSiBridge軟體進行有線元素分析，主要選定高鐵主線上三種預力混凝土箱型梁之橋梁結構，分別為簡支梁、等梁深連續梁與變梁深連續梁，模擬之橋梁參數主要依據交通部高速鐵路工程局出版之高速鐵路土建工程相關書籍設定。透過有限元素軟體的分析，求得高鐵橋梁遭受地震力時橋版各處之地震響應歷時。
根據分析結果作後續深入探討，透過傅立葉轉換得到頻譜，並利用歷時與頻譜了解地震力之傳遞特性，由分析結果顯示地震力對於橋梁側向及垂向有明顯的放大作用。在轉換函數的部分，藉由轉換函數計算出另一地震來臨時，橋梁中點之響應頻譜圖，並藉由計算與模擬之比較，了解轉換函數的正確性。再來根據橋梁的模態頻率與列車車輛之轉向架頻率與蛇行動頻率作最後探討，由結果顯示，在簡支梁橋部分，可能使得轉向架產生垂向共振，對於安全性存在風險，而在最後針對蛇行動頻率做計算，並注意側向可能產生之共振行為，確保列車安全性，避免脫軌現象發生。

This research mainly discusses the transmission characteristics of the bridge and behavior of trains when subjected to an earthquake. First, the type of Taiwan High Speed Rail’s bridge are established, and then the modeling process and the reliability of the model are established through model verification. After the model is verified, the CSiBridge is used to wire Finite element analysis, selected three types of pre-stressed concrete box girder bridge structures on the main line of the high-speed railway, namely simply supported beams, continuous beams with constant beam depth and continuous beams with variable beam depth. The bridge parameters are mainly based on the publication of the Taiwan High Speed Rail Corporation. Through the analysis of finite element method, the seismic response duration of various parts of the bridge plate when the high-speed railway bridge is subjected to seismic force is obtained.
Through the Fourier transform to obtain the frequency spectrum, and use the time and frequency spectrum to understand the transmission characteristics of the seismic force, the analysis results show that the seismic force has a significant amplification effect on the lateral and vertical directions of the bridge. In the part of the transfer function, the transfer function is used to calculate the response spectrum of the midpoint of the bridge when another earthquake comes, and the correctness of the transfer function is understood by comparing the calculation with the simulation.
Next, a final discussion is made according to the modal frequency of the bridge, the frequency of the bogie or train and the frequency of the Hunting Movement, and the results show that in the simply supported beam bridge part, the bogie may have vertical resonance, which is a risk to safety. Finally, calculate the frequency of the Hunting Movement, and pay attention to the possible resonance behavior in the lateral direction to ensure the safety of the train and avoid derailment.

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