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題 名 | 三維有限元素法於柔性路面之破壞分析研究=The Flexible Pavement Distress Analysis by the 3-D Finite Element Method |
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作 者 | 劉明樓; 呂雨蓉; | 書刊名 | 技術學刊 |
卷 期 | 20:3 民94.09 |
頁 次 | 頁269-278 |
分類號 | 442.15 |
關鍵詞 | 車轍; 疲勞龜裂; 現有服務指標; Rutting; Fatigue cracking; Present serviceability index; |
語 文 | 中文(Chinese) |
中文摘要 | 由於國內路面之交通量及車輛荷重有明顯的趨勢,而現有柔性路面厚度設計方法如美國AASHTO及AI等都未明確的由力學觀點探討不同型輪重對路面續效的影響。內有些研究都以多層線性彈性理論或二維軸向對稱有限元素法用於路面之結構分析,但並未能考慮材整非線性及不同型輪重因素。本研考採用能合理模擬瀝青混凝土之非線性模式與三維有限元素法結合,並探討一軸兩輪重之鋪面結構反應並與二維數值解作比較。接著將結構分析結果與破壞模式結合預測鋪面對在車輛反覆荷重所造成之車轍與疲勞龜裂,其結果亦與程式,並比較二維及三維續效分析所得鋪面續效PSI之差異。 |
英文摘要 | Even though the traffic flow of heavy vehicles has increased in Taiwan, the current flexible pavement design methods such as AASHTO and AI methods do not consider the effect of different vehicles, wheels on pavement performance form the mechanics point of view. Some researchers in Taiwan have started to investigate the structural response of pavement by using the multi-layer linear elastic theory, and the axisymmetric nonlinear finite element method to investigate the structural response of asphalt concrete, is incorporated with the 3-dimentional finite element method to investigate the structural response of pavement and the results are compared with the result from 2-dimentioal finite element analysis. The stresses from the structural analysis are combined with the pavement distress models to predict the rutting and fatigue cracking of pavement and the results are compared with the results from 2-dimentional finite element analysis. The stresses from the structural analysis are combined with the pavement distress models to predict the rutting and fatigue cracking of pavement, and compared with the measured distress. Finally, the distress from the 2-D and 3-D finite element methods are incorporated into the Present Serviceability Index equation to compute the PSI by the number of vehicle exposures. |
本系統中英文摘要資訊取自各篇刊載內容。