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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

24卷

期数:

2007年02期

页码:

74-79

栏目:

出版日期:

2007-06-20

文章信息/Info

Title:

Ultimate Bearing Capacity of Concrete-filled Circular Steel Tubular Long Columns with Axial Compression

作者:

田宏伟^1,2,赵均海¹,魏锦¹

1. 长安大学 建筑工程学院,陕西 西安 710061; 2. 昆山市建筑设计院有限公司,江苏 昆山 215300

Author(s):

TIAN Hong-wei^1,2, ZHAO Jun-hai¹, WEI Jin¹

1. School of Architectural Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. Kunshan Architectural Design Ltd, Kunshan 215300, Jiangsu, China

关键词:

圆钢管混凝土柱;  长柱;  极限承载力;  双剪统一强度理论

Keywords:

concrete-filled circular steel tubular column;  long column;  ultimate bearing capacity;  twin shear unified strength theory

分类号:

TU392.3

DOI:

-

文献标志码:

A

摘要:

基于双剪统一强度理论,考虑钢管中间主应力(径向压力)对环向拉力和纵向压力的影响,建立了钢管的承载力公式; 同时,避开混凝土破坏准则中侧压影响系数的不确定性分析,根据混凝土破坏时的统一强度准则建立其承载力公式,进而叠加建立了钢管混凝土短柱的承载力公式。在此基础上,按照弹性模量理论推导出钢管混凝土长柱的稳定影响系数,建立了其极限承载力公式。结果表明,改变加权参数值,计算得出的承载力也随之发生变化。通过与相关文献中的试验值进行比较,发现试验值与计算值吻合良好。

Abstract:

Considering the intermediate principal stress effect of the steel tube on the circumferential tension and longitudinal compression based on the twin shear unified strength theory,a formula of bearing capacity of steel tube was established. Meanwhile,in terms of the unified strength criterion of concrete and avoiding uncertainty analysis of effect factor of circumferential compression in concrete failure criterion,the formula of bearing capacity of core concrete was established. And then by splicing the bearing capacity of short concrete-filled steel tube(CFST), the formula of bearing capacity was formed. Based on it,through elastic modulus theory,the stability effect factor of concrete-filled steel tubular long columns was deduced and then the formula of its ultimate bearing capacity was built. The results show that by altering weighted parameter value, the bearing capacity of concrete-filled steel tube is changed. The calculations are all agree well with the experiment results through comparing with the experimental values of related references.

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相似文献/References:

[1]张建伟,杨亚彬,曹万林,等.圆钢管混凝土边框多重组合低矮剪力墙的抗震性能[J].建筑科学与工程学报,2011,28(03):23.
　ZHANG Jian-wei,YANG Ya-bin,CAO Wan-lin,et al.Seismic Performance of Composite Low-rise Shear Wall with Concrete-filled Round Steel Tube Columns and Concealed Steel Trusses[J].Journal of Architecture and Civil Engineering,2011,28(02):23.
[2]周天华,何保康,周绪红,等.高强冷弯薄壁型钢轴压长柱受力性能试验研究[J].建筑科学与工程学报,2005,22(04):65.
　ZHOU Tian-hua,HE Bao-kang,ZHOU Xu-hong,et al.Experimental research on bearing capacity of high-strength cold-formed thin-walled steel long columns[J].Journal of Architecture and Civil Engineering,2005,22(02):65.

备注/Memo

备注/Memo:

收稿日期:2007-01-15
基金项目:教育部高等学校博士学科点专项科研基金项目(20040710001); 陕西省自然科学基础研究计划项目(2003E₂15)
作者简介:田宏伟(1981-),男,山东鱼台人,长安大学工学硕士研究生,E-mail:tianhongwei7@126.com。

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更新日期/Last Update: 2007-06-20