In the offshore engineering platform tower structures,circular double steel tubes are the main load-bearing members,and the compressive and corrosion resistance behavior is a great concern to design engineers.In order to study the axial compressive behavior of mortar-filled double-skin stainless steel tubular stub column,a set of twelve column specimens was designed using the outer stainless steel tube wall thickness,the inner carbon steel tube diameter and the mortar between two steel tubes as test variables.The failure modes,load-displacement curves,bearing capacity,deformation performance and strain characteristics were analyzed,and the influences of different parameters on the ultimate bearing capacity were studied.The results show that the failure modes of the specimens are the local buckling failure at the end or middle of the outer steel tube.With the increase of the wall thickness of stainless steel tube,the bearing capacity increases linearly.Infilled mortar can effectively improve the bearing capacity,reduce the deformation of the outer steel tube,and improve the ductility of the specimens.For the specimens with infilled mortar,the bearing capacity decreases with the increase of hollow ratio,while for the specimens without mortar,the bearing capacity increases with the increase of hollow ratio.According to different design codes and theoretical formulas proposed by other scholars,the calculated ultimate bearing capacity and test results were compared and analyzed,and the design suggestion was proposed.
stainless steel tubedouble-skininfilled mortaraxial compressive behaviorbearing capacityhollow ratio
万方数据
维普
