建筑钢结构进展2025，Vol.27Issue(11)：75-87,13.DOI:10.13969/j.jzgjgjz.20240522001
基于多因素的钢管混凝土界面黏结性能分析与强度预测模型评价
Analysis of Interfacial Bond Behavior and Strength Prediction Model Evaluation of Concrete-Filled Steel Tube Based on Multiple Factors
赵轩 1杨晨 2胡朝晖 1李贤 2聂影 3刘俊 4廖栩 2刘西光5
作者信息
- 1. 中冶赛迪工程技术股份有限公司,重庆 400013||中国矿业大学 力学与土木工程学院,江苏 徐州 221116
- 2. 中国矿业大学 力学与土木工程学院,江苏 徐州 221116
- 3. 中冶赛迪工程技术股份有限公司,重庆 400013
- 4. 西安建筑科技大学 土木工程学院,西安 710055||西安建筑科大工程技术有限公司,西安 710055
- 5. 西安建筑科技大学 土木工程学院,西安 710055
- 折叠
摘要
Abstract
In order to study the effects of concrete aggregate size,steel tube diameter-to-thickness ratio,length-to-diameter ratio,roughness of steel tube inner wall and fatigue load on the interface bonding properties of concrete-filled steel tube(CFST),9 specimens were designed and push-out tests were carried out.The interface bonding strength and bond stiffness were analyzed by load-slip curve and the distribution of longitudinal and circumferential strains on the outer surface of steel tube during the push-out test.The results show that the displacement of the free end lags behind that of the loading end,and the displacement increment of the free end gradually synchronises with that of the loading end during the loading process.The bonding properties of CFST columns decrease with the increase of the diameter-to-thickness ratio of steel tube and length-diameter ratio,and with the decrease of the inner roughness of steel tube.Fine aggregate concrete will reduce the bond performance,and fatigue will significantly reduce the bond performance of CFST columns.The longitudinal strain of the outer surface of the steel tube increases with the increase of the distance from the loading end,and the load is not uniformly transferred on the steel tube as the bonding is destroyed.The existing CFST bond strength model and test data were sorted out and analyzed.Based on the method of statistical analysis,a bond strength calculation model was fitted with the concrete strength,diameter-to-thickness ratio and length-to-diameter ratio as parameters,which is in good agreement with the actual data.关键词
钢管混凝土/推出试验/界面性能/黏结滑移/黏结强度模型Key words
concrete-filled steel tube/push-out test/interfacial performance/bond-slip/bond strength model分类
土木建筑引用本文复制引用
赵轩,杨晨,胡朝晖,李贤,聂影,刘俊,廖栩,刘西光..基于多因素的钢管混凝土界面黏结性能分析与强度预测模型评价[J].建筑钢结构进展,2025,27(11):75-87,13.
