方形薄壁钢管混凝土轴压短柱约束模型的建立

陈勇, 董志峰, 张耀春

陈勇, 董志峰, 张耀春. 方形薄壁钢管混凝土轴压短柱约束模型的建立[J]. 工程力学, 2012, 29(9): 157-165,176. DOI: 10.6052/j.issn.1000-4750.2010.12.0912
引用本文: 陈勇, 董志峰, 张耀春. 方形薄壁钢管混凝土轴压短柱约束模型的建立[J]. 工程力学, 2012, 29(9): 157-165,176. DOI: 10.6052/j.issn.1000-4750.2010.12.0912
CHEN Yong, DONG Zhi-feng, ZHANG Yao-chun. THE CONFINED MODEL ON SQUARE STUB COLUMN OF CONCRETE-FILLED THIN-WALLED STEEL TUBE[J]. Engineering Mechanics, 2012, 29(9): 157-165,176. DOI: 10.6052/j.issn.1000-4750.2010.12.0912
Citation: CHEN Yong, DONG Zhi-feng, ZHANG Yao-chun. THE CONFINED MODEL ON SQUARE STUB COLUMN OF CONCRETE-FILLED THIN-WALLED STEEL TUBE[J]. Engineering Mechanics, 2012, 29(9): 157-165,176. DOI: 10.6052/j.issn.1000-4750.2010.12.0912

方形薄壁钢管混凝土轴压短柱约束模型的建立

基金项目: 中国建筑股份有限公司科研创新计划项目(CSCEC-2008-Z-29)
详细信息
    作者简介:

    董志峰(1978―),男,辽宁沈阳人,工程师,硕士,从事结构研究与设计工作(E-mail: bpzf@163.com);张耀春(1937―),男,黑龙江哈尔滨人,教授,博导,从事结构研究(E-mail: ych_zhang@163.com).

  • 中图分类号: TU318; TU398.9

THE CONFINED MODEL ON SQUARE STUB COLUMN OF CONCRETE-FILLED THIN-WALLED STEEL TUBE

  • 摘要: 为了对薄壁钢管混凝土轴压短柱在外部钢管屈曲后仍能达到较高极限承载力的试验现象与有限元分析结果进行理论解释,通过薄板的大小挠度理论,推导出计算四边夹支和两边夹支两边简支钢板屈曲后受力性能的公式;得到管壁屈曲后对内部混凝土产生的主动约束力,进而利用约束混凝土模型求得钢管中受约束混凝土极限压应力值;从理论上解析了薄壁钢管混凝土柱在外部钢管屈曲后仍能达到较高极限承载力的机理,给进一步的薄壁钢管混凝土柱理论分析研究提供了依据.
    Abstract: In order to explain the phenomenon that the square concrete-filled thin-walled steel tube (CFTST) stub column under axial loading can also reach higher ultimate load capability after its outside steel tube has been buckled, the formula to research the postbuckling mechanical capability of clamed steel plates are deduced by using the small and large deflection theories, the active confined force inside concrete caused by the outside post-local buckling steel plate is then obtained, thusly the ultimate compressive stress of concrete inside CFTST stub columns can figured out by the confined concrete model, the reason that CFTST stub column under axial loading can reach higher ultimate load capability after its outside steel tube has been buckled is explained, it is very useful for the further theoretical analysis.
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出版历程
  • 收稿日期:  2010-12-12
  • 修回日期:  2011-03-30
  • 刊出日期:  2012-09-24

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