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《结构与土木工程前沿(英文)》 >> 2019年 第13卷 第3期 doi: 10.1007/s11709-018-0501-7

Behaviors of recycled aggregate concrete-filled steel tubular columns under eccentric loadings

. Department of Structural Engineering, Tongji University, Shanghai 200092, China.. University of Western Sydney, School of Computing, Engineering and Mathematics and Institute for Infrastructure Engineering, Locked Bag 1797, Penrith, NSW 2751, Australia

录用日期: 2018-08-01 发布日期: 2018-08-01

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摘要

The paper investigates the behaviors of recycled aggregate concrete-filled steel tubular (RACFST) columns under eccentric loadings with the incorporation of expansive agents. A total of 16 RACFST columns were tested in this study. The main parameters varied in this study are recycled coarse aggregate replacement percentages (0%, 30%, 50%, 70%, and 100%), expansive agent dosages (0%, 8%, and 15%) and an eccentric distance of compressive load from the center of the column (0 and 40 mm). Experimental results showed that the ultimate stresses of RACFST columns decreased with increasing recycled coarse aggregate replacement percentages but appropriate expansive agent dosages can reduce the decrement; the incorporation of expansive agent decreased the ultimate stresses of RACFST columns but an appropriate dosage can increase the deformation ability. The recycled coarse aggregate replacement percentages have limited influence on the ultimate stresses of the RACFST columns and has more effect than that of the normal aggregate concrete-filled steel tubular columns.

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