土木工程与管理学报2017，Vol.34Issue(1)：94-99,112,7.
PBL加劲肋方钢管混凝土界面力学性能试验
Experiment on Mechanical Properties of Concrete-filled Square Steel Tube with PBL
摘要
Abstract
The tight bonding between the two materials is the prerequisite for the performance of CFST, so the combination of the outsourcing steel tube and core concrete should be strengthened. Three forms of steel pipe cross-section were designed:no stiffener, setting stiffener and PBL stiffener. A total of 20 specimens of concrete-filled square steel tube short columns under axial compression. It analyzed the variation law of load transfer and interfacial bond strength between different cross sections. The reason of load-slip curve trend was revealed by 3D scanning technique. According to the testing results, setting stiffener significantly improved local buckling resistance of specimens and bond strength, and its bond-slip shear modulus is nearly doubled, but the influence of the rib plate is not obvious. PBL stiffener have the best interfacial bonding effect due to the formation of concrete dowels. Combining the experimental results with the previous experimental data, the relationship between interfacial average bond strength with coupling coefficient, the width to thickness ratio as well as slenderness ratio were analyzed.关键词
钢管混凝土/粘结强度/推出试验/PBL加劲肋/3D扫描Key words
concrete-filled steel tube/bond strength/launch test/PBL stiffener/3 D scanning分类
建筑与水利引用本文复制引用
靳忠强,张宁,尚柏羽,李慧..PBL加劲肋方钢管混凝土界面力学性能试验[J].土木工程与管理学报,2017,34(1):94-99,112,7.基金项目
国家自然科学基金(51378068) （51378068）
中央高校基本科研业务费资助项目(310821151101) （310821151101）
