In　order　to　better　understand　the　behavior　of　CFST-CSW　arch,　experiment　on　two　hingeless　CFST-CSW　arches　are　described　in　this　paper,　subjected　to　in-plane　symmetrical　and　asymmetrical　loading　respectively.　The　experiment　yield　important　information　regarding　the　manifestation　of　the　limit　state　and　also　afford　an　opportunity　to　verify　finite　element　modeling　techniques　for　use　in　a　parametric　study.　The　parametric　study　reveals　that　the　load-carrying　capacity　is　influenced　by　many　factors　including　the　rise-to-span　ratio,　slenderness　ratio,　loading　cases　and　material　properties.　©　(2011)　Trans　Tech　Publications.