Correlation Curve Analysis of Compression-Bending Capacity for High-Strength Concrete-Filled Steel Tubular
Circular concrete-filled steel tubular(CFST) has been widely used in modem bridge structures due to its good structural behavior.Besides, the research on the mechanical behavior of Circular CFST has been relatively complete because of its simpler cross-section and the basis for the study of the mechanical behavior of truss and dumbbell cross-section.However, there have been relatively few studies on the mechanical behavior of HSCFT compression-bending members.So the static tests of 4 HSCFT members under compression-bending were carried out based on the parameter of axial load ratio in this paper.Then, the load-strain curves and load-Poisson ratio curves during the test were analyzed, which demonstrates the flexural capacity of members increase with the increase of axial load ratio when the axial load ratio is small, the flexural capacity of members decrease with the increase of axial load ratio when the axial load ratio is relatively high (n>0.33).Combined with 3 domestic codes towards HSCFT members, the correlation curves under compression-bending of the codes and the test results were compared and analyzed, which demonstrates that the calculation results of the specifications on compression-bending capacity are mostly conservative.Among them, the Technical code for concrete filled steel tubular structures (GB 50936-2014) is closer to experiment data and relatively accurate, which is more suitable for the simulation of the correlation curve of HSCFT members under compression-bending.
High-strength concrete-filled steel tubular(HSCFT) Axial load ratio Compressi on-bending capacity Correlation curve
Jing Liu Ye Sheng Shoukai Xue
College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fujian, China
国际会议
福州
英文
949-956
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）