On the Stress-Strain of Steel Tube Column Filled with Steel-Reinforced Concrete Subject to Compression-Flexure Loading
In order to study the bearing capacity and section stress-strain distribute on the steel tube filled with steel-reinforced concrete (STSRC) compression-flexure column, four compression-flexure members of STSRC were tested and theoretical researched. The major parameters of the test were axial compression ratio (n=0.5~0.85). The result of the study showed that: load-deformation() typical curve includes three stages, elastic characteristic, elastic-plastic characteristic, and disruption; Along with the increase of axial compression ratio, the bearing capacity and ductility reduced, but the peak displacement had not change enough; The composite column conformed to plane section, and the larger the axial compression ratio, the further distance of neutral axis of section to the centric axis and closer to the tensile region. ; During the loading process, the steel skeleton in compressive zone yield, but in tensile region never yielded. According to the test results and the limit equilibrium method, the formula for calculating the compression-flexure member of STSRC was established. A good agreement between the calculation results and testing results illustrates, which is feasible to using the calculating formula to calculate the bearing capacity of STSRC.
Dongye Sun, Wen-Pei Sung and Ran Chen
X. Liu and M. Li, "On the Stress-Strain of Steel Tube Column Filled with Steel-Reinforced Concrete Subject to Compression-Flexure Loading", Applied Mechanics and Materials, Vols. 71-78, pp. 3855-3860, 2011