The　influence　of　rise-to-span　ratio,　y-value　and　arch　rib　spacing　on　the　in-plane　and　out-of-plane　critical　flexure　load　and　critical　axial　force　of　arch　rib　were　studied　by　employing　an　existing　steel　arch　bridge.　The　results　show　that,　due　to　the　different　assumptions　in　multinational　criteria,　the　parameters　have　different　impact　on　the　in-plane　and　out-of-plane　critical　flexure　load　and　critical　axial　force.　Moreover,　the　comparison　analysis　with　FE　results　reveals　that　the　Chinese　code　and　Japanese　code　are　relatively　accurate　for　in-plane　and　out-of-plane　critical　loads,　respectively.