Damping　system　represents　the　energy　dissipation　characteristics　of　the　overall　structural　system.　The　correct　identification　of　damping　system　is　not　only　the　premise　of　selecting　dynamical　analysis　method,　but　also　the　foundation　of　obtaining　accurate　results　in　seismic　analysis.　Traditionally,　the　identification　of　damping　system　under　dynamic　action　is　based　on　material　properties.　However,　this　method　is　lack　of　theoretical　and　experimental　research.　Based　on　fundamental　identification　method,　the　paper　presents　the　study　on　the　consistency　of　dynamic　characteristics　between　different　parts　by　shaking　table　test.　The　changing　law　of　SSI　damping　system　in　different　dynamic　processes　is　investigated.　The　experimental　results　indicate　that　SSI　system　manifest　obviously　classical　energy　dissipation　characteristics　under　certain　conditions　and　can　be　considered　as　an　approximate　classical　damping　system.　©　Published　under　licence　by　IOP　Publishing　Ltd.