Concrete Core Strength and Deformability in Prestressed Concrete Filled Steel Tube Columns

[摘要] The article reviews efficient methods of accomplishing stronger bonds between concrete and outer steel shell through transverse prestressing of the concrete core. Load-strain diagrams are provided for concrete subject to uniaxial and triaxial compression. The authors describe formulas of the basic parametric point, a vertex, of a deformation curve of triaxially compressed concrete. When making estimations using these formulas, the following is considered: long-term stressing of concrete, specifics of its behavior under triaxial compression, and whether it was prestressed.

[发布机构] Design Department, Nosov Magnitogorsk State Technical University, 11 Uritsky Str., Magnitogorsk; 455000, Russia^1;Saint-Petersburg Mining University, 21 line, Vasilievsky Island 2, Saint-Petersburg; 199106, Russia^2;Department of Building Design and Constructions, Nosov Magnitogorsk State Technical University, 11 Uritsky Str., Magnitogorsk; 455000, Russia^3

[关键词] Concrete core;Concrete filled steel tube columns;Deformation curves;Pre-stressed;Steel shells;Strain diagrams;Transverse prestressing;Triaxial compression