کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4918687 1428781 2016 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Prediction on dynamic modulus of asphalt concrete with random aggregate modeling methods and virtual physics engine
ترجمه فارسی عنوان
پیش بینی در مورد مدول پویای بتن آسفالت با روش های مدل سازی تصادفی جمع آوری شده و موتور فیزیک مجازی
کلمات کلیدی
بتن آسفالت، مدول پویا، مدل سازی تصادفی، موتور فیزیکی مجازی شبیه سازی عددی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
Asphalt mixture usually needs compaction prior to servicing in field. Traditionally, finite element methods cannot simulate the compaction of asphalt mixture in field. Although discrete element methods (DEM) are able to describe such a process, the intrusion among aggregates always exists and influences the calculation accuracy. Additionally, the central difference method used in DEM requires very fine elements, which significantly jeopardizes the calculation efficiency. This study proposed an innovative systematic method to generate virtual asphalt mixture based on random aggregate modeling method and virtual physics engine theory. The aggregates were virtually generated with random aggregate modeling methods and imported into the virtual physics engine, where the movements of aggregates in asphalt concrete during compaction was simulated. The coordinates of aggregates after compaction were extracted, which were incorporated into the Convex Hull Algorithm to determine the new locations of aggregates after compaction. The original contribution of this study is that a pre-processing method of generating virtual asphalt concrete was proposed, which can successfully introduce compaction of asphalt mixture into finite element models and solve the intrusion problem of aggregates. The dynamic modulus of asphalt concrete simulated in finite element method (FEM) based on this modeling method was found much closer to the experimental results, comparing to the traditional analytic methods. It indicates the proposed method valid in generating virtual asphalt concrete in FEM.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 125, 30 October 2016, Pages 987-997
نویسندگان
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