Steel-concrete-steel　(SCS)　sandwich　shells,　which　are　combined　with　steel　plates,　concrete　core　and　shear　connectors,　are　usually　applied　as　protective　structures　in　the　civil　engineering.　In　this　paper,　nine　curved　SCS　sandwich　shells　subjected　to　concentrated　load　by　a　hemi-spherical　head　were　tested　to　obtain　the　failure　characteristic,　ultimate　strength　and　load-displacement　response.　The　finite　element　(FE)　models　of　curved　SCS　sandwich　shells　were　also　established　by　using　LS-DYNA.　The　accuracies　of　the　FE　models　were　verified　by　comparing　the　load-displacement　curves,　local　and　global　deformation　between　the　experimental　results　and　FE　predictions.　The　factors　influencing　the　ultimate　strength　and　deformation　behavior　of　curved　SCS　sandwich　shells　were　analysed,　including　concrete　core　and　steel　plate　thickness,　top　to　bottom　steel　plate　thickness　ratio　and　spacing　of　shear　connectors.　Through　experiments　and　numerical　simulations,　three　failure　modes　could　be　summarized.　It　was　also　found　that　increasing　concrete　core　and　top　steel　plate　thickness　and　reducing　the　spacing　of　shear　connectors　could　increase　yield　strength　and　ultimate　strength　of　curved　SCS　sandwich　shell.　The　increase　of　concrete　core　and　steel　plate　thickness　also　led　to　higher　energy　absorption　capacity;　whereas,　the　spacing　of　shear　connectors　showed　little　effect　on　energy　absorption　capacity.