Abstract
To study the mechanical performance of recycled aggregate concrete filled square steel short tube under eccentric compression load,15 specimens were designed and used in the monotonic loading test to obtainfailure modes, failure loading, and curves on loading-deformation and loading-strain. Two factors were considered in the experiment which was recycled aggregate, replacement ratio and eccentricity in an effort to analyse consequence on mechanical property. The ultimate bearing capacity and bearing capacity formulas for axial compression and partial compression of RACFSST short column for different parameters is calculated by ABAQUS. The results show similarities between natural aggregate concrete filled square steel short tube and recycled aggregate concrete filled square steel short tube in the aspects of the bearing capacity, failure modes, deformation features and strain distribution in the section; bearing capacity of the aggregate concrete filled square steel short tube would slightly decrease as the rise of the recycled aggregate replacement ratio and would have a remarkable fall with the growth of eccentricity; the formula value of axial compression and bias short column is in good agreement with the test results.
