- 學位論文
地震作用下車軌橋互制分析之脫軌係數研究
Derailment coefficient analysis of earthquake off the bridge rail system interoperability
摘要
本研究建立真實橋梁數值分析模型，並且經由車軌橋現地量測實驗結果驗證數值模型精確性，再由數值模型模擬地震作用下真實車軌橋互制下脫軌行為與脫軌係數。本研究進行脫軌振動台實驗，使用國家地震工程研究中心台鐵TR81型貨車轉向架脫軌實驗系統，考慮於不同正弦波及921集集地震歷時之振動下的脫軌機制，並且建立脫軌實驗曲線。車軌橋現地量測實驗，分別比對橋梁變位、鋼軌應變、橋梁振動速度、伸縮縫、軌道橋梁結構振動頻率。車軌橋數值分析模型中，混凝土強度與軌道參數均取自現地實驗量測數據。無地震下不同車速下車軌橋互制下車速與位移等曲線圖，並求得共振頻率。 此外、探討振動台脫軌曲線與現地車軌橋互制數值分析模型脫軌值差異性。本研究首度克服實驗量測技術問題，成功完成轉向架脫軌曲線圖，並且以接近真實車軌橋互制數值模型，計算出列車脫軌係數值。
並列摘要
In this study, a real numerical model of a vehicle-rail bridge interaction is established. In order to confirm accuracy of this numerical model, numerical results of are compared with field test results. The shake table tests under strong earthquakes are to study derailment coefficient. The shaking table test is using TR81 Taiwan Railway Freight bogie for derailment experimental system in the NCREE. Earthquake records are using sine waves and 921 earthquake records. Two experimental derailment curves are established from using shake table tests. The vehicle-rail bridge interaction model is used to simulate bridge displacements and strains, rail strain, bridge velocities, expansion joint displacements and X, Y and Z first natural frequencies of field tests. Bridge resonance frequency under various speed of train is computed. In addition, in order to verify the derailment coefficient from shake table test, derailment coefficient of vehicle-rail bridge interaction model is compared with shake table test. The proposed simulation analysis of vehicle-rail bridge interaction model is success to simulate the derailment behaviors of the vehicle.
參考文獻
延伸閱讀
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