Design method of concrete-filled circular stainless steel tubular columns using ferritic stainless steel
To study the axial compressive behaviour of the concrete-filled circular stainless steel tubular stub columns using ferritic stainless steel,its finite element model was first of all established and verified.The model was then used to create a database of typical samples.Based on the samples database,the influences of parameters such as the diameter-thickness ratio,nominal yield strength and concrete strength on its axial compressive behaviour were analyzed.And the validity of existing design approaches for the concrete-filled circular steel tubular stub column were verified using the sample database.Finally,simplified models of the axial compressive bearing capacity,axial compressive stiffness and peak strain were rec-ommended for the concrete-filled circular stainless steel tubular stub columns using ferritic stainless steel.The results obtained by using the simplified models match well with the fi-nite element results.