Strength of Short Concrete Filled Steel Tube columns of Annular Cross Section

[摘要] The procedure for calculating the strength of short centrally compressed concrete filled steel tube columns of annular cross-section is presented in the paper. The procedure takes into account the complex stress state of the concrete core and the steel shell as well as the nonuniform distribution of transversal stresses across the cross-section of the calculated element. When there are reinforcement bars in the concrete, the stress in these bars must be calculated taking into account the increased deformability of concrete. The proposed calculation procedure is applicable to structures made of different concrete types and steel grades.

[发布机构] Department of Building Design and Constructions, Nosov Magnitogorsk State Technical University, Uritsky, 11, Magnitogorsk; 455000, Russia^1;Russian Academy of Architecture and Construction Sciences, Institute of Urban Development, Moscow; 107031, Russia^2;Department of Construction Engineering, Nosov Magnitogorsk State Technical University, Uritsky, 11, Magnitogorsk; 455000, Russia^3

[关键词] Calculation procedure;Complex stress state;Concrete core;Concrete filled steel tube columns;Concrete types;Non-uniform distribution;Reinforcement bar;Steel shells