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研究生:劉妍麟
研究生(外文):Yen-Lin Liu
論文名稱:使用等效簡化扣件組模型之軌橋互制行為分析
論文名稱(外文):Track-Bridge Interaction Analysis Using Simplified Effective Fastener Model
指導教授:王仲宇
指導教授(外文):Chung-Yue Wang
學位類別:碩士
校院名稱:國立中央大學
系所名稱:土木工程學系
學門:工程學門
學類:土木工程學類
論文出版年:2020
畢業學年度:108
語文別:中文
論文頁數:157
中文關鍵詞:鋼軌扣件系統軌橋互制行為墊片破壞現地監測SAP2000
外文關鍵詞:Rail fastening systemTrack-bridge interactionPad damageField measurementSAP2000
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當軌道與橋梁互制作用影響時,鋼軌扣件系統必須有效束制鋼軌移動,若扣件系統中有組件破損,則會大幅增加鐵路上的養護成本。本研究主要探討現地三種不同路段之行為模式,分別為平直段、陡坡段與曲線段,路段中有鋼軌墊片與基鈑墊片大量破損問題,故此研究旨在發展一套能快速而精確模擬軌橋互制行為的數值分析模型,且根據鋼軌扣件組行為以LS-Dyna進行詳細3D接觸動力行為的模擬分析結果,以有限元素軟體SAP2000使用剛架與彈簧元素建立精確分析之等效簡化扣件組模型,依據欲分析之不同路段行為提出相應簡化程度之模型,應用於現地橋梁與軌道系統當中,探討長區段軌橋系統在溫度荷載、列車荷載、扣件組螺栓鎖固力等等外力載重產生之行為變化,並與現地檢監測數據做比對驗證,確保模型正確性,然而找出墊片破壞的可能原因與範圍並研擬可行之改善方法,將來可作為大尺度軌道橋梁數值模擬分析的參考依據,具經濟性及效益性。
The rail fastening system must effectively fix the rails due to the track- bridge interaction. If any component in the rail fastening system is damaged, it will greatly increase the maintenance cost of the railway. This research mainly discusses the behavior patterns of three different spans, namely straight span, steep slope span and curved span. There are a large number of damage to rail pads and intermediate pads in the spans. Therefore, the research progresses to develop a set of numerical analysis models that can quickly and accurately simulate the behavior of track-bridge interaction. Based on the behavior results of the rail fastening system that use LS-Dyna to perform detailed 3D contact dynamic behavior simulation analysis. From the results, use the finite element software SAP2000 establish an equivalent simplified fastener model for accurate analysis by rigid frame and spring elements , propose corresponding simplified model based on the behavior of different segments to be analyzed. Replace it on field track-bridge system and discuss the behavioral changes of the rail bridge system under external load such as temperature change , train moving load, fastener bolt locking force, and so on. In addition, finite element analysis was conducted and the results were compared with the measured track-bridge interaction response. Find out the possible cause and the influence area of pad damage then develop feasible improvement methods. In the future, it can be used as a reference basis for numerical simulation analysis of large-scale rail bridges, which is economical and beneficial.
摘要 I
Abstract II
誌謝 III
目錄 IV
圖目錄 VII
表目錄 XIV
第一章 緒論 1
1.1研究動機與目的 1
1.2研究方法與論文架構 2
第二章 文獻回顧 5
2.1長焊鋼軌理論及相關規定 5
2.1.1鋪設條件 6
2.1.2鋪定溫度 6
2.1.3橋上長焊鋼軌受溫度變化之軸力分析 8
2.2軌道與橋梁互制文獻探討 9
2.3鋼軌扣件組行為模擬文獻探討 12
第三章 鋼軌扣件組簡化模擬分析 14
3.1鋼軌扣件組簡化模型構想 14
3.2鋼軌扣件系統介紹 14
3.3扣件組之簡化力學模型 17
3.4扣件組行為說明與參數設定 18
第四章 橋梁與軌道系統靜力模擬分析 27
4.1軌橋數值模型分析案例探討及分析流程 27
4.2軌橋互制行為監測說明 27
4.2.1溫度數據整理 30
4.2.2鋼軌軸力數據計算 30
4.3 平直段軌橋互制行為數值模擬分析 34
4.3.1軌橋結構 34
4.3.2分析模型參數設定 36
4.3.3監測數據與數值模擬分析方法比對說明 40
4.3.4 大梁伸縮縫相對位移量數值模擬分析 42
4.3.5道版與鋼軌相對位移數值模擬分析 43
4.3.6鋼軌與鋼軌墊片相對位移數值模擬分析 45
4.3.7鋼軌軸力數值模擬分析 47
4.3.8鋼軌初始應力狀態推算 49
4.3.9鋼軌墊片破壞區間探討 54
4.3.10 ST-A/ST-B/ST-C行為比較 59
4.4陡坡段軌橋互制行為數值模擬分析 60
4.4.1軌橋結構 60
4.4.2分析模型參數設定 61
4.4.3監測數據與數值模擬分析方法比對說明 65
4.4.4大梁伸縮縫相對位移量數值模擬分析 67
4.4.5道版與鋼軌相對位移 68
4.4.6鋼軌與鋼軌墊片相對位移數值模擬分析 70
4.4.7鋼軌軸力數值模擬分析 72
4.4.8鋼軌初始應力狀態推算 74
4.4.9鋼軌墊片破壞區間探討 76
4.4.10 SS-A/SS-B之行為比較 80
4.5曲線段軌橋互制行為數值模擬分析 81
4.5.1軌橋結構 81
4.5.2分析模型參數設定 82
4.5.3監測數據與數值模擬分析方法比對說明 88
4.5.4大梁伸縮縫相對位移量數值模擬分析 90
4.5.5道版與鋼軌相對位移 91
4.5.6鋼軌與鋼軌墊片相對位移數值模擬分析 93
4.5.7鋼軌軸力數值模擬分析 94
4.5.8鋼軌初始應力狀態推算 96
4.5.9鋼軌墊片破壞區間探討 98
4.5.10 CS-A/CS-B之行為比較 102
第五章 橋梁與軌道系統動力模擬分析 103
5.1前言 103
5.2鋼軌墊片受外力荷載影響分析 103
5.2.1參數設定 103
5.2.2分析結果 107
5.3基鈑墊片受外力荷載影響分析 111
5.3.1參數設定 111
5.3.2分析結果 112
5.4軌橋系統溫差行為變化模擬 114
第六章 結論與建議 120
6.1結論 120
6.2建議 122
參考文獻 124
附錄A SGS墊片拉伸試驗曲線及報告書 127
附錄B 螺栓鎖固扭矩反算 134
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