文档介绍：Engineering Structures 25 (2003) 1611–1626 ate/engstruct A new three-dimensional ?nite element analysis model of high-speed train–bridge interactions Myung-Kwan Song a, ?, Hyuk-Chun Noh b, Chang-Koon Choi c aStructural Division, Yooshin Engineering Corporation, Seoul 135-936, South Korea bSmart Infra-Structure Technology Center, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea cDepartment of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, South Korea Received 12 February 2003; received in revised form 20 May 2003; accepted 21 May 2003 Abstract In this study, a new ?nite element model for three-dimensional FE analysis of high-speed train–bridge interactions is proposed, in which various improved ?nite elements are used for modeling the structural constituents of a railway bridge. Speci?cally, the deck of a railway bridge is modeled by nonconforming ?at shell (NFS) elements with 6 DOFs, which have shown high performance in the numerical examples of previous research. The track structures are idealized using beam ?nite elements with the offset of beam nodes and assumed to be beams on a two-parameter elastic foundation. Also, the vehicle model devised for a high-speed train is employed, which has an articulated bogie system. Using Lagrange’s equation, the equations of motion of the vehicle–bridge system can be formulated. In addition, by deriving the equations of the forces acting on the bridge considering the vehicle–bridge interaction forces, plete system matrices of the total vehicle–bridge system can be constructed. As numerical examples of this study, a simply supported steel–posite bridge and a two-span PC box-girder bridge are analyzed and results pared with those of previous research and experimental results. ? 2003 Elsevier Ltd. All rights reserved. Keywords: Railway bridge; Vehicle–bridge interaction analysis; Three-dimensional ?nite element analysis; Nonconforming ?at