建筑钢结构进展2025，Vol.27Issue(12)：89-100,12.DOI:10.13969/j.jzgjgjz.20240712001
圆形和方形截面钢管再生混凝土中配筋的效率研究
Efficiency of Reinforcement in Recycled Aggregate Concrete-Filled Circular and Square Steel Tubes
摘要
Abstract
To assess the improvement efficiency of reinforcement for the mechanical performance of recycled aggregate concrete-filled steel tube(RACFST)with a 100%replacement rate of recycled coarse aggregate(RCA),axial compression tests were conducted on 28 short column specimens by varying the longitudinal reinforcement ratio with 10 different configurations.Based on experimental results,the efficiency of reinforcement on the mechanical performance was explored using key indicators such as failure mode,stiffness,yield-to-strength ratio,strength per unit reinforcement ratio,ductility,composite effects,and the confinement efficiency of reinforcement as evaluation criteria.The results show that the influence of reinforcement on the mechanical properties of square section RACFSTs,at lower reinforcement ratios,is more significant;reinforcement significantly affects the internal failure mode and mechanical properties of a square section RACFST;when the ratio is between 1.15%and 2.85%,the longitudinal reinforcement has a better improvement efficiency for a circular section RACFST;reinforcement does not significantly affect the external failure modes of the two sections;increasing the amount of reinforcement does not necessarily improve the mechanical performance of the component,as the efficiency of reinforcement will decrease after a certain reinforcement ratio is exceeded.After a comprehensive consideration of various indicators,the recommended range of reinforcement ratios for circular and square section RACFSTs are 1.49%to 3.36%and 0.80%to 3.36%respectively.关键词
钢管再生混凝土/100%再生骨料取代率/纵筋配筋率/轴压试验/承载力/钢筋的约束效率Key words
recycled aggregate concrete-filled steel tube/100%replacement rate/longitudinal reinforcement ratio/axial compression test/bearing capacity/confinement efficiency of reinforcement分类
建筑与水利引用本文复制引用
阿里甫江·夏木西,郑甜甜,乔玲玲..圆形和方形截面钢管再生混凝土中配筋的效率研究[J].建筑钢结构进展,2025,27(12):89-100,12.基金项目
国家自然科学基金(51968068) （51968068）
