Experimental Research on Mechanical Behavior of Circular CFST Member under Compression-bending-torsion Condition
With the axial load ratio and ratio of bending moment to torsion as the changing parameters, the tests of four circular concrete-filled steel tubular (CFST) members were carried out under compression-bending-torsion condition.The variation of bending moment-deflection curve and torque-twist curve of each member under different axial load ratio and ratio of bending moment to torsion are analyzed.The results show that the bending capacity and torsion strength of each member increase when axial load ratio increases from 0 to 0.22 and the invariant ratio of bending moment to torsion, the specimen is reduced earlier and the ductility is poor at the later stage.When axial load ratio is invariant and ratio of bending moment to torsion is increased from 0.9 to 2.8, the bending capacity of the specimens show a rising trend with the increase of the ratio of the bending moment to torsion, while the ultimate torque of the specimens are in decline with the increase of the ratio of the bending moment to torsion, ratio of bending moment to torsion is larger, there is the phenomenon of Bending failure, while ratio of bending moment to torsion is relatively small, there is the phenomenon of Torsion failure.Compared with axial load ratio, ratio of bending moment to torsion has a greater influence on the yield state of the specimens.With the increase of the ratio of bending moment to torsion, the specimens go into yield period earlier.
Concrete-filled steel tubular (CFST) Axial load ratio Ratio of bending moment to torsion Compression-bending-torsion Experiment
Chenghuo Lai Ye Sheng Cheng Meng
College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fujian, China
国际会议
福州
英文
957-964
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）