tailieunhanh - Nghiên cứu trạng thái ứng suất nhiệt trong tấm bê tông xi măng mặt đường bằng phương pháp phần tử hữu hạn

Bài viết "Nghiên cứu trạng thái ứng suất nhiệt trong tấm bê tông xi măng mặt đường bằng phương pháp phần tử hữu hạn" trình bày các phân tích trạng thái ứng suất nhiệt của mặt đường bê tông xi măng do sự phân bố phi tuyến của nhiệt độ trong tấm gây ra. Điều kiện nhiệt độ khu vực thành phố Hồ Chí Minh được sử dụng. Mời các bạn cùng tham khảo! | Journal of Science and Transport Technology University of Transport Technology Investigation of thermal stress in concrete pavement based on the finite element method Tran Nam Hung Pham Duc Tiep Military Techincal Academy 236 Hoang-Quoc-Viet Street Hanoi Vietnam Article info Abstract The variation of ambient temperature in days causes thermal stress Type of article in the cement concrete slabs of the road rigid pavement. There have been Original research paper many studies on this issue in the literature. However because the thermal stress in the pavement depends a lot on the climatic condition of the region Corresponding author where the road is located so this topic is still being interested by scientific E-mail address community. In the technical standards of rigidpavement calculations of some tranhung@ countries thermal stress is calculated from the temperature gradient between the concrete slab surface and slab bottom and this quantity is usually taken Received as a constant value. In fact the temperature gradient varies continuously with November 23 2021 depth from the slab surface. This paper presents the analysis of thermal stress Accepted state of concrete pavement caused by the nonlinear distribution of Fabruary 14 2022 temperature in the slab. Ho Chi Minh City area temperature conditions were Published used. Numerical calculations in this study were based on the finite element March 2 2022 method. The obtained results showed that the concrete pavement slab is continuously subjected to convex and concave bendings and the tensile and compressive thermal stresses occur at all positions in the slab depending on the time of day that could result in thermal fatigue damage of the pavement. Keywords concrete pavement thermal stress temperature gradient convex bending concave bending. JSTT 2022 2 1 23-35 https vn Tạp chí điện tử Khoa học và Công nghệ Giao thông Đại học Công nghệ Giao thông vận tải Nghiên cứu trạng thái ứng suất .