A practical formula for predicting compressive strength of axially loaded circular CFDST short columns

摘要

Based on the published experimental results, the applicabilityof the empirical formulas and the proposed formula wasinvestigated in this paper. From the investigation, the followingconclusions can be drawn:(1) A confinement coefficient ηc was proposed to reflect theconfinement effect of concrete strength in axially loadedcircular CFDST short columns;(2) The proposed formula can effectively predict thecompressive strengths of circular CFDST short columnsfabricated not only within a large range ofdiameter-to-thickness ratio and hollow ratio, but alsowithin normal- and high- strength steel and concrete.