华南理工大学学报(自然科学版) ›› 2014, Vol. 42 ›› Issue (11): 113-120.doi: 10.3969/j.issn.1000-565X.2014.11.017

• 土木建筑工程 • 上一篇    下一篇

圆端内约束钢管混凝土轴压短柱力学性能研究

付磊1 丁发兴1 谷利雄2 龚永智1†   

  1. 1.中南大学 土木工程学院,湖南 长沙 410075; 2.华南理工大学 土木与交通学院,广东 广州 510640
  • 收稿日期:2014-05-23 修回日期:2014-07-18 出版日期:2014-11-25 发布日期:2014-11-17
  • 通信作者: 龚永智(1978-),男,博士,副教授,主要从事结构加固与改造研究. E-mail:gyzh@yahoo.cn
  • 作者简介:付磊(1985-),男,博士,主要从事钢-混凝土组合结构研究.E-mail:fulei19862008@126.com
  • 基金资助:

    国家科技支撑计划项目(2011BAJ09B02);新世纪优秀人才支持计划项目(NCET-11-0508)

Mechanical Properties of Stirrups Confinement Concrete- Filled Round- Ended Steel Tubular Stub Short Columns Under Axial Compression

Fu Lei1 Ding Fa- xing1 Gu Li- xiong2 Gong Yong- zhi1   

  1. 1.School of Civil Engineering,Central South University,Changsha 410075,Hunan,China; 2.School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-05-23 Revised:2014-07-18 Online:2014-11-25 Published:2014-11-17
  • Contact: 龚永智(1978-),男,博士,副教授,主要从事结构加固与改造研究. E-mail:gyzh@yahoo.cn
  • About author:付磊(1985-),男,博士,主要从事钢-混凝土组合结构研究.E-mail:fulei19862008@126.com
  • Supported by:

    国家科技支撑计划项目(2011BAJ09B02);新世纪优秀人才支持计划项目(NCET-11-0508)

摘要: 为改善圆端形钢管混凝土(CFRT)柱的力学性能,采取在钢管内部焊接拉筋的方式来提高对核心混凝土的约束效果,并采用ABAQUS 对4 种不同约束方式的圆端形钢管内约束混凝土(SCFRT)轴压短柱进行三维实体有限元分析,发现双向均匀对拉箍筋为最佳约束方式.最后,对2 根圆端形钢管混凝土轴压短柱及2 根双向均匀对拉约束方式的圆端形拉筋约束混凝土轴压短柱进行了试验研究,结果显示试验结果与数值模拟结果吻合较好,验证了双向均匀对拉约束方式的合理性.

关键词: 钢管混凝土柱, 圆端形钢管, 轴压短柱, 力学性能, 有限元

Abstract:

In order to improve the mechanical properties of confinement concrete- filled round- ended steel tubular (CFRT) stub columns,this paper adopts the way of welding stirrups to enhance the constraint effect on core con- crete.Then,the ABAQUS software is employed to analyze the finite element parameters of the 3D solid of stirrups confinement concrete- filled round- ended steel tubular (SCFRT) stub columns in four constraint ways,and the way of bidirectional butt joint stirrups is found to be the best.Finally,two sets of CFRT stub columns and two sets of SCFRT stub columns are investigated by experiments.It is found that the experimental results accord well with the simulation ones,which demonstrates that the way of bidirectional butt joint stirrups is rational.

Key words: concrete- filled steel tube column, round- ended steel tube, axially- compressed short column, mechani- cal property, finite element

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