動態車輪載重對鋪面績效影響的評估

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姓名

王鈞平(Jun-Ping Wang) 查詢紙本館藏

畢業系所

土木工程學系

論文名稱

動態車輪載重對鋪面績效影響的評估

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摘要(中)

本研究採用三維有限元素分析鋪面結構，分成二部份，一是靜態非均佈載重，另一是探討動態均佈載重。分別說明如下：
在靜態非均佈載重方面，續用前人將輪胎模型模擬成輪胎與鋪面表面的接觸應力分佈，模擬車輛停止時對鋪面的影響。
在動態均佈載重方面，使用均佈車輪載重，並讓載重隨時間改變作用位置，模擬車輛等速移動時對鋪面的影響。
以上兩種情形，再針對路基土壤材料彈塑性、不同含水量、以及覆土應力作用下，分析不同胎壓與載重作用下鋪面的反應。研究結果顯示，載重型式相同時，動態對鋪面的影響比靜態小；但由於均佈載重和非均佈載重會隨載重和胎壓的增加而造成差異增大，導致表面撓度和應變會有所差異。

摘要(英)

In this study, 3-dimensional finite element model is used to analyze pavement response. Two parts are included in the analysis. On one hand, non-uniformly static contact stresses are considered; on the other hand, uniformly dynamic contact stresses are discussed.
In the condition of non-uniformly static contact stress, pavement structure effect of vehicle stop is simulated and the effect of tire pressure on pavement structure under traffic load was observed.
In the condition of uniformly dynamic contact stress, load positions are changed with time to simulate pavement structure effect of vehicle moving at uniform speed.
In the analysis, plastic material property, water content, and earth stress are used to analyze the pavement response under different loads and tire pressures. The results show that, when the loading type is the same, the dynamic influence is smaller than static. However, there are different between the results from uniform and non-uniform loads. Increasing load and tire pressure lead to different deflections of surface and strains.

關鍵字(中)

★ 靜態非均佈載重
★ 動態均佈載重
★ 彈塑性

關鍵字(英)

★ non-uniformly static contact stress
★ uniformly dynamic contact stress
★ static-plastic property

論文目次

摘要………….…………………………………………………I
目錄……………………………………………………….……….......IV
表目錄……………………………………………..……………..…..VII
圖目錄……………………………………………………....………VIII
第一章緒論 1
1.1前言 1
1.2研究動機及目的 2
1.3研究方法 2
1.4論文架構 3
第二章文獻回顧 4
2.1 多層彈性理論 4
2.1.1 Boussinesq理論 4
2.1.2 多層系統 5
2.1.3多層彈性理論鋪面設計程式KENLAYER 6
2.2 路面結構強度指數 8
2.3有限元素法應用於三維柔性鋪面結構研究分析 9
2.3.1 有限元素程式 9
2.3.2邊界條件 10
2.3.3 車輪荷重 10
2.3.4 鋪面幾何模擬 12
2.4材料回彈系統 13
2.4.1回彈模數設計法 13
2.4.2 回彈模數組成模式 14
2.4.3 路基土壤之回彈模數組成模式 16
2.5 鋪面破壞形式 17
2.5.1 疲勞破壞準則 17
2.5.2 車轍破壞準則 18
2.6輪胎載重模擬 20
2.7 輪胎與鋪面間接觸應力分佈之相關研究 21
2.8 材料塑性行為 23
第三章鋪面模型的建立及驗證 24
3.1三維有限元素柔性鋪面模型建立 24
3.1.1 ABAQUS/CAE簡介 24
3.1.2幾何模擬 24
3.1.3邊界條件 25
3.1.4車輪載重 25
3.1.5 材料性質 26
3.1.6有效路基深度的分析 26
3.2 柔性鋪面模型的驗証 27
3.2.1均質半空間網格數驗証 27
3.2.2 載重作用處網格劃分驗證 28
第四章路基土壤使用彈性與塑性模式之分析 38
4.1 路基土壤材料性質 38
4.1.1 路基土壤含水量變化對材料性質影響 38
4.1.2 在不同含水量下之 Mohr-Coulomb 塑性模式參數 40
4.1.3 土壤性質及試驗結果 41
4.1.4 大地應力與側向土壓力係數 42
4.2 路基土壤在不同含水量下彈性與塑性模式分析比較 43
4.2.1表面撓度分析比較 43
4.2.2 水平應變分析比較 44
4.2.3 垂直應變分析比較 45
4.2.4 綜合討論 46
第五章移動載重對柔性鋪面績效之影響 58
5.1 鋪面模型 58
5.1.1 模型驗證 58
5.1.2 邊界條件 59
5.1.3 增量控制 59
5.1.4 車速選擇 59
5.1.5 分析方法比較 59
5.2 均佈移載重非均佈靜態載重比較 60
5.3 鋪面疲勞破壞與車轍損壞分析 60
5.3.1 鋪面疲勞破壞經驗準則 61
5.3.2 鋪面車轍損壞經驗準則 62
5.4 路基土壤彈性與彈塑性模式對鋪面損壞分析之比較 63
5.4.1 瀝青層疲勞龜裂分析 63
5.4.2 路基土壤車轍變形分析 63
第六章結論與建議 75
6.1 結論 75
6.2 建議 76
參考文獻 77

參考文獻

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指導教授

張瑞宏(Jui-Hung Chang)

審核日期

2007-1-20

推文