| 研究生: |
蔣子凡 Chiang, Tzu-Fan |
|---|---|
| 論文名稱: |
道碴阻力對軌道挫曲溫度之影響 Influences of railway ballast resistance on track buckling temperature |
| 指導教授: |
郭振銘
Kuo, Chen-Ming |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2017 |
| 畢業學年度: | 105 |
| 語文別: | 中文 |
| 論文頁數: | 56 |
| 中文關鍵詞: | 長焊鋼軌 、挫屈溫度 、道碴橫向阻力 、軌道斷面 |
| 外文關鍵詞: | Continuously Welded Rail, Buckling temperature, ballast lateral resistance;railway cross section |
| 相關次數: | 點閱:99 下載:17 |
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鐵道運輸現今往長軌化發展,提供乘客較為安靜且舒適的服務,但缺少伸縮縫會導致應力累積,溫度變化大時可能會有挫曲及斷軌的危險,而挫曲對安全之嚴重性大於斷軌,因此著手於軌道挫曲的研究。
本研究發現,橫向阻力為最易影響挫曲的因素,因此建立預測橫向阻力與挫曲溫度的簡單公式,以利工程界使用。
研究結果顯示,增加挫曲容許升溫最容易的方式為堆積道碴,又以路肩堆高效果最佳。在重軌化的條件下,鋼軌挫曲溫度降低,而台灣使用的有碴軌道規範已不合時宜,須對橫向阻力的要求做修正。
In order to provide better service for passengers, Continuously Welded Rail (CWR) has been used in the railway industry. However, rails can’t stretch with the change of temperature, stress accumulation will cause buckling and tension crack.
The study found that lateral resistance impact buckling temperature a lot. Therefore, setting up a model of predict buckling temperature and lateral resistance. Further, the best way to increase buckling temperature and lateral resistance is accumulating ballast. Moreover, heaping on shoulder is the most effective.
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