Aiming　at　a　complex　coupled　vehicle-bridge　problem,　a　triple-beam　model　was　applied　to　model　bridge　structure　and　a　simple　separation　iteration　solution　method　was　presented　based　on　ANSYS　program.　The　detailed　derivation　process　and　computational　procedures　of　the　problem　were　also　presented　and　validated　by　the　field　dynamic　test　of　a　preselected　dual-box　girder　curved　bridge.　The　inverse　fast　Fourier　transformation　was　applied　to　generate　road　irregularity　and　its　velocity　term　of　grade　B　according　to　power　spectral　density　of　road　roughness.　The　curvature　radius　and　vehicle　speed　effects　were　analyzed　based　on　the　dynamic　amplification　factor　(DAF)　of　a　curved-bridge　considering　the　traveling　eccentricity　of　vehicles.　The　results　indicated　that　the　DAF　of　the　curved　bridge　is　larger　than　that　of　a　straight　bridge,　and　DAFs　of　internal　forces　and　displacement　at　different　positions　are　different　significantly;　the　internal　forces　and　displacements　have　different　sensitivities　to　curvature　radius,　and　their　DAFs　vary　greatly　while　the　curvature　radius　is　smaller　than　a　certain　characteristic　value.