Analysis of Base Shear and Displacement of Long, Short and Medium Steel Reinforced-Concrete Filled Tubular Column under Effect of Axial Concentrated Load

Abstract

Nowadays, using concrete-filled tubular (CFT) columns has become common increasingly in the construction projects and this is to some extent because of excellent properties of seismic resistance. The limitation caused by the steel frame could improve concrete properties under a three axial mode and on the other hand, prevents inner buckling of the steel tube. The increased properties of the sections by the concrete could be expressed based on composite behavior of steel tube and concrete core. Hence, in this study, inelastic buckling behavior of short, medium and long columns under uniform loading is studied with regard to different buckling stiffness in form of anchor indication in peak of column using Abaqus software. The results obtained from the modeling show that with the analysis of the real time ideal ultimate load caused by the analysis and maximum strain values, maximum spring force equivalent for anchor indication, base shear, displacement, factors affecting buckling of composite columns such as column and anchor conditions affecting this field are undeniable and through comparing them, significant difference could be observed between ideal force tolerable by columns with real values caused by inelastic analysis in buckling of columns