Bài viết trình bày lý thuyết cơ bản về phương pháp phân lớp hữu hạn (Finite Layer Method) được trình bày và là cơ sở phát triển mã nguồn FastKM bằng ngôn ngữ lập trình Python và giao diện người dùng cho phép mô phỏng bài toán kết cấu mặt đường nhựa nhiều lớp. | Transport and Communications Science Journal Vol 72 Issue 3 04 2021 291-305 Transport and Communications Science Journal DEVELOPING PROGRAM FOR ASPHALT PAVEMENT STRUCTURE ANALYSIS BY FINITE LAYER METHOD Khuong LE NGUYEN University of Transport Technology No 54 Trieu Khuc Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 12 01 2021 Revised 26 02 2021 Accepted 28 02 2021 Published online 15 04 2021 https Corresponding author Email khuongln@ Abstract. Finite element method FE has been widely used in simulating and predicting degradation of asphalt pavement. However the three-dimensional 3D model in commercial software such as ABAQUS or open-source software like Cast3M requires an important computation time and resources. To solve this problem several simplified models are developed for specific purposes. In this study the basic theory of finite layer method is presented. This method is the basis for developing FastKM source code in Python programming language and user interface that allows simulation of multi-layered asphalt pavement structures. The obtained results are graphs and color charts showing displacement stress and deformation of the structure under static load. Next a typical asphalt pavement was simulated on 3 softwares CAST3M ABAQUS and FastKM with 3 different analysis methods LET Layer Elastic Theory FEM Finite Element Method and Finite Layer Method FLM to verify the accuracy of FastKM as well as compare computation time between these three models. FastKM using FLM method gives accurate results equivalent to 3D finite element model on Abaqus and computation time is faster than the other two methods. Keywords Finite layer method asphalt pavement FEM Cast3M Abaqus FastKM. 2021 University of Transport and Communications 291 Tạp chí Khoa học Giao thông vận tải Tập 72 Số 3 04 2021 291-305 Tạp chí Khoa học Giao thông vận tải PHÁT TRIỂN CHƯƠNG TRÌNH TÍNH TOÁN KẾT CẤU MẶT ĐƯỜNG NHỰA THEO PHƯƠNG PHÁP PHÂN LỚP
