Experiments　on　concrete　filled　steel　tubular　(CFST)　dumbbell　shaped　rib　model　arches　have　been　carried　out　with　loads　concentrated　at　crown　and　L/4　sections　respectively.　The　result　indicates　that　CFST　dumbbell　shaped　rib　arch　has　good　elastic-plastic　behavior　and　high　strength,　and　no　local　buckling　during　the　whole　loading　process.　Its　in-plane　mechanic　behavior　is　similar　to　that　of　the　CFST　arch　with　single　tube.　A　dual　nonlinear　finite　element　model　is　developed　and　the　calculation　results　agree　well　with　the　experiment　results.　A　comparison　of　the　load-carrying　capacity　of　arches　is　carried　out　between　the　finite　element　method　and　the　equivalent　beam-column　method.　The　parameters　considered　are　the　ratio　of　rise　to　span,　slenderness　ratio,　steel　ratio　and　loading　patterns.　It　is　found　that　the　variation　of　load-carrying　capacity　of　CFST　dumbbell　shaped　rib　arch　are　similar　to　those　of　the　single　tube　rib　arch.　It　is　also　found　the　calculated　curves　by　the　equivalent　beam-column　method　and　that　by　the　finite　element　method　have　the　same　pattern.