کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6480980 1428780 2016 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influences by air voids on fatigue life of asphalt mixture based on discrete element method
ترجمه فارسی عنوان
تأثیرات حفره های هوا بر زندگی خستگی مخلوط آسفالت بر اساس المان های گسسته
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
The paper studied the impacts of different air void parameters on the fatigue life of asphalt mixture based on discrete element method (DEM). By using discrete element software PFC3D (Particle Flow Code in Three Dimensions), virtual three-dimensional fatigue test was built according to the laboratory four-point bending beam fatigue test with stress-controlled loading mode. And the feasibility of virtual fatigue test was confirmed by laboratory testing data. Based on virtual fatigue test, the influences by content, distribution, size and orientation of air voids on the fatigue life of asphalt mixture were evaluated. It is found that, higher air void content leads to lower fatigue life of asphalt mixture especially when the air void content exceeds the designed air void content of asphalt mixture, interconnected air voids with bigger size is more harmful to the fatigue life of asphalt mixture than the independent air voids with smaller size especially when the orientation of air voids is parallel to the fatigue loading direction, and the non-distribution of air voids within asphalt mixture specimen also has important influences on the fatigue life of asphalt mixture especially for the variation of the air void distribution within the central-bottom section of asphalt mixture specimen. Thus, to guarantee the fatigue durability of asphalt mixture, it is important to improve the content, distribution and microstructure of air voids within asphalt mixture.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 126, 15 November 2016, Pages 785-799
نویسندگان
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