Nonlinear Dynamic Analysis of the Wind–Train–Bridge System of a Long-Span Railway Suspension Truss Bridge

In order to study the coupling vibration between a bridge and train under action of crosswind loads, dynamic interaction model wind–train–bridge system is established considering geometric nonlinear factors long-span suspension bridge. A calculation frame composed, corresponding computer program written. highway–railway scheme studied as an example. The linear responses simultaneous both loads wind are compared using self-written program, influence velocity speed on studied. results show that large displacement nonlinearity structure does not changing tendency acceleration time histories, but reduces maximum values responses. accelerations more obvious than displacements. natural frequencies this very low it sensitive action. changes in average have great value displacement, especially when lateral deformation increase sharply with velocity, wind, train, can easily occur. research provide references for safe operation maintenance bridges.