含钢率对方钢管再生混凝土短柱受力性能的影响

兰州理工大学学报 ›› 2026, Vol. 52 ›› Issue (1): 120-126.

含钢率对方钢管再生混凝土短柱受力性能的影响

阿里甫江·夏木西^*, 麦麦提艾力·麦麦提敏, 柳才坚

新疆大学建筑工程学院, 新疆乌鲁木齐 830047

收稿日期:2022-11-30 出版日期:2026-02-28 发布日期:2026-03-05
通讯作者: 阿里甫江·夏木西(1975-),男,新疆乌鲁木齐人,博士,教授.Email:ilikyurt@xju.edu.cn
基金资助:
国家自然科学基金(51968068)

Influence of steel ratio on axial compressive behavior of recycled aggregate concrete-filled square steel tube short column

ALIFUJIANG Xiamuxi, MAIMAITIAILI Maimaitimin, LIU Cai-jian

College of Civil Engineering and Architecture, Xinjiang University, Urumqi 830017, China

Received:2022-11-30 Online:2026-02-28 Published:2026-03-05

摘要/Abstract

摘要： 为研究100%再生粗骨料取代率下含钢率对方钢管再生混凝土短柱(RACFST)受力性能的提升作用及规范公式的适用性,进行了轴心受压试验.试验中,分别设计了10根方形钢管混凝土(CFST)和RACFST试件,根据试验结果对比分析了含钢率对破坏模式、荷载-位移特性、刚度、断裂韧性、延性、承载力等关键力学指标的影响机理,同时对承载力计算方法进行了探讨.结果表明:随着含钢率的增加,方形RACFST的各项力学性能得到一定改善,但改善效率并不可观;含钢率较低时,现有规范公式承载力预测值比实际值高,可靠性较低,但随着含钢率的增加,预测值的可靠性增加;当含钢率大于9%时,可使用规范给出的承载力计算公式来预估再生骨料取代率为100%的方形RACFST短柱的轴压承载力.

关键词: 方钢管再生混凝土, 100%再生粗骨料取代率, 含钢率, 承载力, 试验研究

Abstract: To clarify the improving effect of the steel ratio on mechanical performance and applicability of Code formulas of recycled aggregate concrete-filled square steel tube (RACFST) short column with 100% recycled coarse aggregate replacement ratio, experimental studies were performed. A total of 10 specimens, including both square CFST and RACFST columns, were designed and tested. Based on the experimental results, the influencing mechanism of steel ratio on failure mode, load-displacement behaviour, fracture toughness, ductility and load-carrying capacity was analyzed, and the strength predicting method was discussed. Results show that the increase of steel ratio can effectively improve the mechanical performances of square RACFST, but the improvement is not proportional to the steel ratio. With the lower steel ratio, the prediction results of the code are higher than experimental values and reliability reduces, and the reliability of prediction results, however, tends to stabilise with the increase of steel ratio. When the steel ratio is greater than 9%, the load-carrying capacity evaluation formulas given by the code can be used to predict the axial strength of square RACFST short columns with 100% recycled coarse aggregate replacement ratio.

Key words: recycled aggregate concrete-filled square steel tube, 100% recycled coarse aggregate replacement ratio, steel ratio, load-carrying capability, experimental study

中图分类号:

TU398+.9

阿里甫江·夏木西, 麦麦提艾力·麦麦提敏, 柳才坚. 含钢率对方钢管再生混凝土短柱受力性能的影响[J]. 兰州理工大学学报, 2026, 52(1): 120-126.

ALIFUJIANG Xiamuxi, MAIMAITIAILI Maimaitimin, LIU Cai-jian. Influence of steel ratio on axial compressive behavior of recycled aggregate concrete-filled square steel tube short column[J]. Journal of Lanzhou University of Technology, 2026, 52(1): 120-126.

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