柔性鋪面於反覆載重下之車轍損傷評估

Damage Assessment for Flexible Pavement Rutting under Repeated Loading

張瑞宏(Jui-Hung Chang) ； 黃偉慶(Wei-Hsing Huang) ； 李奇瑋(Chi-Wei Li) ； 楊樹榮(Shu-Jung Yang)

《中國土木水利工程學刊》 21卷2期 (2009/06) Pp. 219-229

https://doi.org/10.6652/JoCICHE.200906_21(2).0009

摘要

本論文整合鋪面結構設計及計算規範、試體試驗、以及非線性有限元素力學分析等三種方法，進行柔性鋪面承受反覆載重後的車轍損傷分析；分析的主題分為鋪面結構之回彈應變場計算、以及車轍損傷評估兩部份。論文中針對我國現有省道之典型幾何斷面，在不同的胎壓、軸重、路基土壤含水量、及反覆載重次數等變因的組合之下，計算對應之車轍深度及損傷比值。研究結果顯示，胎壓對車轍深度並無顯著之影響，而軸重則與車轍深度呈現幾近正比之關係；另一方面，當路基土壤含水量增加時，車轍深度亦隨之升高；此外，鋪面之車轍損傷比值隨著反覆載重次數的增加而提高，車轍損傷的累積在反覆載重初期較為快速。

關鍵字

柔性鋪面 ； 反覆載重 ； 車轍 ； 回彈應變 ； 永久變形 ； 損傷比值

並列摘要

In this paper, damage assessment for flexible pavement rutting under repeated traffic loading is carried out by using an integrated approach with combined application of design guide for pavement structures, laboratory material experiments, and nonlinear finite element analysis. The analysis in this research includes two major subjects, i.e. calculation of resilient strain distribution and assessment of rutting damage for pavement structures. A series of parametric study is performed by evaluating the rutting depth and damage ratio for Taiwan Provincial Highway system under various combinations of tire pressures, dual axle loads, subgrade water content, and cycles of repeated loading. The results indicate that, while the rutting depth is not significantly affected by tire pressure, it appears to depend nearly linearly upon the magnitude of axle loads. Also, the damage ratio increases as subgrade water content increases. And, it is observed that rutting damage is more significantly accumulated in the early stage of repeated loading process.

並列關鍵字

flexible pavement ； repeated loading ； rutting ； resilient strain ； permanent deformation ； damage ratio