In　order　to　understand　the　seismic　behavior　of　concrete　filled　steel　tubular　(CFST)　arch　ribs　under　the　rare　earthquakes　excitation　of　ELcentro　wave　and　Hanshin　wave,　a　CFST　model　of　scaled　1:10　was　constructed　on　the　unique　Earthquake　Simulator　of　Triple　Shaking　Tables　Array　at　Fuzhou　University.　The　testing　results　indicate　that　the　CFST　arch　rib　structure　has　entered　into　the　nonlinear　elastic-plastic　phase　since　the　strains　of　the　steel　tube　and　core　concrete　in　the　mainly　sections　of　an　arch　rib　are　far　larger　than　their　limit　elastic　stains.　However,　the　stiffness　and　natural　frequencies　of　the　arch　rib　model　do　not　have　significant　decrease　because　of　the　hooping　effect　on　the　core　concrete　subjected　by　the　steel　tube.　Moreover,　there　are　no　distinct　cracks　or　damage　on　the　surface　of　the　steel　tube,　which　reveals　that　the　CFST　arch　rib　structure　has　a　favorable　seismic　performance.　The　testing　results　also　show　that　the　different　earthquake　response　spectrums　will　relatively　induce　the　varying　seismic　performance,　and　the　magnifications　of　response　are　related　to　the　waves＇　predominant　frequencies,　ranges　and　peak　vales　as　well　as　the　model＇s　dynamic　behavior.　Furthermore,　the　responses　of　accelerations,　displacements,　and　strains　under　the　excitation　in　the　Y-transverse　direction　are　generally　larger　than　that　in　the　X-longitudinal　direction,　especially　at　the　arch　crown.　Otherwise,　compared　to　the　strains　in　the　top-bottom　edge　at　the　cross-section　of　springs,　the　strains　in　right-left　edge　are　larger　and　more　disadvantageous,　which　need　to　be　considered.　©,　2015,　Tsinghua　University.　All　right　reserved.