钢筋增强钢管混凝土短柱的轴心受压性能  

Axial Load Performance of Concrete-Filled Steel Tube Stub Column Strengthened with Reinforcing Bars

作　　者：阿里甫江·夏木西[1] 刘晓蕊 Alifujiang Xiamuxi;LIU Xiaorui(School of Architecture and Civil Engineering,Xinjiang University,Urumqi Xinjiang 830047,China)

机构地区：[1]新疆大学建筑工程学院,新疆乌鲁木齐830047

出　　处：《新疆大学学报（自然科学版）（中英文）》2021年第1期91-99,共9页Journal of Xinjiang University(Natural Science Edition in Chinese and English)

基　　金：国家自然科学基金项目(51968068).

摘　　要：为了探究混凝土强度对钢筋增强钢管混凝土短柱(R-CFST)轴压性能的影响规律,进行了试验研究.试验中,将混凝土的强度等级作为主要参数,制备了6种混凝土强度的R-CFST、钢管混凝土和普通钢筋混凝土等54根圆形截面短柱试件.根据试验结果,分析了混凝土强度对受力性能、破坏模式、延性、套箍效应和峰值荷载的影响.结果表明:由于钢筋的贡献,R-CFST轴压性能的退化不随混凝土强度的提高而增加,具有较好的塑性性能;钢筋对R-CFST延性、套箍效应和强度的改善随混凝土强度的提高而变得更加明显;混凝土强度的提高不造成破坏模式的改变;高强度混凝土填充时配置适量钢筋可以有效增强R-CFST的受力性能;给出的计算公式能合理计算R-CFST承载力.To clarify the effect of concrete on loading performance of concrete-filled steel tube stub column strengthened with reinforcement(R-CFST),compression tests were conducted.Using the concrete strength as parameter,R-CFST,concrete-filled steel tube and reinforced concrete specimens were prepared in 6 concrete strength-grades,and total 54 specimens were tested.Based on the test results,the loading performance,failure mode,ductility,confinement effect and peak load were analyzed.Finally,conclusions were attained as follows:because of interaction of the reinforcement,performance-degradation of R-CFST will not increase as the concrete strength increases,and shows better plastic deformability;improving effect of reinforcement on ductility,confinement effect and strength of R-CFST will increase as the concrete strength increases;increase of concrete strength will not cause significant changes in failure mode;proper reinforcement will bring enhancement of performance of R-CFST filled with high-strength concrete;the proposed equation is applicable to predict the strength of R-CFST.

关 键 词：钢筋增强钢管混凝土 混凝土强度 受力性能 延性 套箍效应 破坏模式 承载力 

分 类 号：TU398.9[建筑科学—结构工程] TU317.1