A　2D　finite　element　model　for　a　semi-infinite　space　with　layered　media　and　Rayleigh　wave　input　was　built　by　using　equivalent　viscous-elastic　artificial　boundary　elements.　The　responses　in　free-field　of　even　and　layered　media　were　computed.　The　results　indicated　that　the　finite　element　method　has　excellent　estimation　precision　compared　with　the　theoretical　solutions.　The　dynamic　response　of　a　pile-soil-bridge　structure　with　dynamic　interaction　under　Rayleigh　waves　was　analyzed.　A　typical　rigid　frame　bridge　was　included　in　this　case　study.　The　influence　of　different　site　conditions,　changes　of　location　of　soft　interlayer,　different　Rayleigh　wave　input　and　pile　length　on　Rayleigh　wave　propagation　and　the　seismic　response　were　considered.　The　influencing　factors　of　the　rigid　frame　bridge　structure　were　also　discussed.