Stiffened Design and Experimental Study of Axial Compressive Performance on Thin-walled CFT Square Columns
ZHENG Xinzhi
Abstract：Currently for the thin-walled rectangular (square) CFT columns, it is an important research subject to increase its stiffness and ductility, enhance its resistance to local buckling capability effectively and economically. Accordingly, researches on axial compression performance of 8 thin-walled square CFT columns are undertaken to compare ultimate bearing capacity, ductility, local buckling mode of stiffened concrete filled thin-walled steel tubular column and corresponding steel consumption with ordinary concrete filled thin-walled steel tube. Compared with ordinary CFT column and CFT column only setted with binding bars, researches show that stiffened set can make confinement effect of the tubular wall to core concrete more uniformly in less enhancement of steel consumption situation. It improves the overall binding effect to improve the strength of concrete, thus constitutive relationship was improved. So that axial compression bearing capacity and ductility of CFT column are increased, deformation state of local buckling are changed, its benefit and the economic benefit is considerable with good promotion value.
Keywords：Thin-walled CFT columnBinding barStiffenerAxial bearing capacityDuctility performanceEconomic benefit
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 94-102 )