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EXPERIMENTAL STUDY OF CONCRETE-FILLED DOUBLE SKIN STEEL TUBULAR COLUMNS WITH OCTAGON SECTION UNDER ECCENTRIC LOADS
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摘要: 以长细比和偏心率为变化参数,对4个八边形中空夹层钢管混凝土偏心受压构件进行试验研究。通过对试验现象和试验结果的详细分析,总结出此类构件的一些力学特点,并与相同条件下的圆中空夹层钢管混凝土、方中空夹层钢管混凝土进行比较,发现其承载能力比方形截面柱高,比圆形截面柱稍低。其承载力影响因素主要有构件的轴压性能、抗弯性以及偏心率。在分析试验结果和利用数值分析的基础上,提出压弯构件承载力验算公式,与试验结果吻合良好。Abstract: The main parameters varied in the study are the slenderness ratio and eccentricity of load.Four concrete-filled double skin steel tubular(CFDSST) columns under eccentric loads and two columns under axial compression are studied. Based on the analysis of the experimental phenomenon in detail, some mechanic characteristics are put forward. Through the comparison with other two kinds of CFDSST (one with circular section, and the other with square section), the bearing capacity of the members is larger than that of the former and lesser than that of the latter. Finally, a simplified formula is proposed in the paper, and the calculated results are in good agreement with the test results or the mathematic results. The results are valuable for engineering designers
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Key words:
- double skin /
- octagon /
- slenderness ratio /
- eccentricity /
- load-displacement curve /
- bearing capacity
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[2] .韩林海, 陶忠, 黄宏. 中空夹层钢管混凝土构件力学性能的研究[R]. 福州: 2002. .韩林海. 钢管混凝土结构[M]. 北京: 科学出版社, 2000. [3] .韩林海.钢管混凝土结构理论与实践[M]. 北京: 科学出版社, 2004. [4] .杨俊杰, 徐汉勇, 彭国军. 八边形中空夹层钢管混凝土轴压短柱力学性能的研究[J]. 土木工程学报, 2007 , 40(2): 33-51. [5] .陶忠, 韩林海, 黄宏.圆中空夹层钢管混凝土柱力学性能研究[J]. 土木工程学报, 2004, 37(10):56-67. [6] .陶忠, 韩林海, 黄宏.方中空夹层钢管混凝土偏心受压柱力学性能的研究[J]. 土木工程学报, 2003, 36(2): 33-35. -
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