Axial compression behavior of circular recycled concrete-filled steel tubular short columns reinforced by silica fume and steel fiber

被引：24

作者：

Chen, Juan ^{[1
]}

Liu, Xuan ^{[1
]}

Liu, Hongwei ^{[1
]}

Zeng, Lei ^{[1
]}

机构：

[1] Yangtze Univ, Sch Urban Construct, 1 Nanhuan Rd, Jingzhou, Hubei, Peoples R China

来源：

STEEL AND COMPOSITE STRUCTURES | 2018年 / 27卷 / 02期

关键词：

recycled concrete-filled steel tube (RACFST); axial compression; steel fiber reinforced concrete; mechanical performance; AGGREGATE CONCRETE; STRUCTURAL CONCRETE; DEMOLISHED CONCRETE; ROAD CONSTRUCTION; SUBBASE MATERIAL; FRESH CONCRETE; PERFORMANCE; LOADINGS; WASTES; COARSE;

D O I：

10.12989/scs.2018.27.2.193

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents an experimental work for short circular steel tube columns filled with normal concrete (NAC), recycled aggregate concrete (RAC), and RAC with silica fume and steel fiber. Ten specimens were tested under axial compression to research the effect of silica fume and steel fiber volume percentage on the behavior of recycled aggregate concrete-filled steel tube columns (RACFST). The failure modes, ultimate loads and axial load-strain relationships are presented. The test results indicate that silica fume and steel fiber would not change the failure mode of the RACFST column, but can increase the mechanical performances of the RACFST column because of the filling effect and pozzolanic action of silica fume and the confinement effect of steel fiber. The ultimate load, ductility and energy dissipation capacity of RACFST columns can exceed that of corresponding natural aggregate concrete-filled steel tube (NACFST) column. Design formulas EC4 for the load capacity NACFST and RACFST columns are proposed, and the predictions agree well with the experimental results from this study.

引用

页码：193 / 200

页数：8

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