tailieunhanh - Phân tích tĩnh dầm trên nền đàn hồi có kể đến sự không tiếp xúc giữa dầm và nền sử dụng phần tử dầm - nền dị hướng

Bài viết Phân tích tĩnh dầm trên nền đàn hồi có kể đến sự không tiếp xúc giữa dầm và nền sử dụng phần tử dầm - nền dị hướng trình bày xây dựng ma trận độ cứng của phần tử dầm nền dị hướng; Thành lập công thức tính ma trận độ cứng của phần tử dầm-nền dị hướng. | Transport and Communications Science Journal Vol 72 Issue 5 06 2021 552-564 Transport and Communications Science Journal STATIC ANALYSIS OF BEAM RESTING ON ELASTIC FOUNDATION BY ANISOTROPIC BEAM-FOUNDATION ELEMENT TAKING INTO ACCOUNT NON-CONTACT BETWEEN BEAM AND FOUNDATION Do Xuan Quy Vu Thi Nga University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam ARTICLE INFO TYPE Research Article Received 08 04 2021 Revised 10 05 2021 Accepted 14 05 2021 Published online 15 06 2021 https Corresponding author Email quysbvl@ Tel 0989556088 Abstract. Beam resting on the elastic foundation is a common structure in the construction engineering especially in civil engineering for instance ground beams buoys floating on water piles resting in foundation or rails acting on railway sleepers. The well-known computing models used in design based on the assumption that beam is fully contacted with foundation. In fact there are some non-contact regions between beam and foundation and hence the above assumption is not always valid. As a result such conclusions or recommendations made by construction consultants are sometimes inappropriate with the actual behaviors of beam and foundation. This paper proposes a new element in FEM so-called anisotropic beam-foundation element. Each proposed anisotropic beam-foundation element characterizes a combined model between beam element and foundation. This anisotropic beam-foundation element allows the FE analysis of beam resting on foundation considering contact and non-contact regions between beam and foundation. The behavior of beam and foundation is presented through explicit formulations. As a result the analysis of beam resting in foundation with these explicit forms leads to faster convergence compared to other methods. Keywords beam resting on elastic foundation FEM nonlinearity anisotropic restraints anisotropic beam-foundation element. 2021 University of Transport and .