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研究生:陳漢峻
研究生(外文):Han-ChunChen
論文名稱:改善橋梁用以減少在基礎沉陷下列車行車脫軌之研究
論文名稱(外文):Improvement of Bridge Structures for Decreasing Train Derailments Under Foundation Settlements
指導教授:朱聖浩
指導教授(外文):Shen-Haw Ju
學位類別:碩士
校院名稱:國立成功大學
系所名稱:土木工程學系碩博士班
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:英文
論文頁數:83
中文關鍵詞:橋梁-列車-軌道互制脫軌軌道不整度基礎沉陷Newmark 法
外文關鍵詞:bridge-train-rail interactionderailmentrail irregularityfoundation settlementNewmark method
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  • 被引用被引用:0
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  • 下載下載:25
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本論文之主要目的為改進高鐵橋梁結構,以降低高速列車在基礎發生沉陷時造成脫軌之可能性。本研究經由有限元素法建立一精確之橋梁-列車-軌道模型,其中包含輪元素、彈簧-阻尼元素與集中質量、以及剛性聯結。於脫軌分析中,靜力有限元素分析使用於基礎沉陷之模擬;紐馬克直接積分法則使用於求解列車行經橋梁之模擬。由分析結果顯示,提升整體軌道之勁度與使用額外的鋼梁對軌道加勁皆無法有效降低脫軌係數,然而,縮短大梁偏心距可有效降低脫軌係數。軌道不整度會明顯提升脫軌係數,因此平滑的軌道可以降低列車行經基礎沉陷地段之脫軌係數。此外,由於列車脫軌係數會隨著行車速度提高而增加,因此,當列車行經基礎沉陷之區域時,降低行車速度為最安全的方法。
The main purpose of this thesis is to improve the bridge structures to decrease the derailment when the high-speed train passes a location with foundation settlements. In order to obtain the precise results, a bridge-train-rail interaction model combined with wheel element, spring-damper, lumped mass, and the rigid link effect is established to perform the train derailment analysis by using the finite element method. For the derailment analysis, the static finite element analyses is applied to study the high-speed train moving on bridges under the foundation settlement, and the Newmark direct integration analyses is applied to find the solution of the high-speed train moving on bridges calculated in static analyses. The results indicate that strengthening the track rail stiffness and reinforcing the track rail by additional beams were not effective methods to decrease the derailment coefficients. Shortening the length of bridge girder eccentricity was an effective method to decrease the derailment condition of high-speed trains during foundation settlement. The influences of rail irregularities will increase the derailment coefficients, as a result, a smooth rail can decrease the derailment coefficient when passing the location with settlement. Moreover, the derailment coefficients increase with the train speed. Thus, when passing the location with foundation settlements, decrease the train speed is the best way to ensure safety.
摘要 I
Abstract II
誌謝 III
List of Tables VI
List of Figures VII
Chapter 1 Introduction 1
1.1 Background and purpose 1
1.2 Literature review 2
1.3 Brief account of research 10
Chapter 2 Theory Illustrations 11
2.1 Introduction 11
2.2 The major theories used in the finite element program 11
2.2.1 The moving wheel element 12
2.2.2 Spring-damper and lumped mass element 13
2.2.3 The rigid link effect 14
2.3 The coefficient of derailment 16
2.4 Rail irregularity 17
2.5 Newmark method 19
Chapter 3 Programs and Models 24
3.1 Introduction 24
3.2 Programs in the finite element analysis 24
3.2.1 The AB program 24
3.2.2 The AE program 25
3.2.3 The AD program 25
3.2.4 The AN program 25
3.2.5 The GBD95SDA program 26
3.3 Model and mesh illustration 26
3.3.1 Wheel and rail model 27
3.3.2 High-speed train model 27
3.3.3 Bridge model 28
Chapter 4 Settlement Response Analysis 36
4.1 Introduction 36
4.2 Finite element simulation of the foundation settlement 36
4.3 The settlement analysis results 37
4.3.1 The case of strengthening the track rail stiffness 38
4.3.2 The case of additional reinforcement of the track rail 38
4.3.3 The case of shortening the eccentricity of the girder 39
4.3.4 The relationship between train speed and settlement 40
4.4 Discussions and conclusions 40
Chapter 5 Conclusions and Future Works 72
5.1 Conclusions 72
5.2 Future works 73
References 75
Appendix 82

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