华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (2): 107-111.

• 土木建筑工程 • 上一篇    下一篇

带约束拉杆方形钢管混凝土偏压短柱的试验研究

何振强 蔡健   

  1. 华南理工大学 建筑学院,广东 广州 510640
  • 收稿日期:2005-08-31 出版日期:2006-02-25 发布日期:2006-02-25
  • 通信作者: 何振强(1973-),男,博士生,主要从事结构工程和高层结构设计的研究 E-mail:saint-h@sohu.com
  • 作者简介:何振强(1973-),男,博士生,主要从事结构工程和高层结构设计的研究
  • 基金资助:

    广东省自然科学基金资助项目(0209650)

Experimental Investigation into Square CFT Stub Columns with Binding Bars Under Eccentric Loads

He Zhen-qiang  Cai Jian   

  1. College of Architecture and Civil Engineering,South China Univ.ofTech.,Guangzhou 510640,Guangdong,China
  • Received:2005-08-31 Online:2006-02-25 Published:2006-02-25
  • Contact: 何振强(1973-),男,博士生,主要从事结构工程和高层结构设计的研究 E-mail:saint-h@sohu.com
  • About author:何振强(1973-),男,博士生,主要从事结构工程和高层结构设计的研究
  • Supported by:

    广东省自然科学基金资助项目(0209650)

摘要: 为了解带约束拉杆方形钢管混凝土短柱在单向偏心荷载作用下的力学性能,进行了14个试件的偏压试验,主要研究截面含钢率、荷载偏心率以及约束拉杆设置对带约束拉杆方形钢管混凝土短柱偏压力学性能的影响.结果表明,方形钢管混凝土短柱试件的承载力随着偏心率的增大而减小,随着钢管壁厚度(含钢率)的增大而增大,设置约束拉杆有助于该试件极限承载力和延性的提高.文中还利用国内现有规程中的方法对该类试件的承载力进行了计算,发现规程计算结果总体上低估了带约束拉杆方形钢管混凝土偏压试件的级限承载力,

关键词: 约束拉杆, 方形钢管混凝土短柱, 承载力, 延性

Abstract:

In order to investigate the mechanics properties of square CFT(Concrete-Filled Tubular)stub columns with binding bars under unilateral eccentric loads,14 specimens were tested by considering the parameters such as the steel ratio.the load eccentricity ratio and the location of the binding bars.Experimental results indicate that (1)the bearing strengths of the specimens decrease with the increase in the load eccentricity ratio while they in-crease with the increase in the steel ratio,and(2)binding bars help to improve the ultimate strength and the duc-tilitv 0f the eccentric-loaded specimens.The tested results were finally compared with the results calculated by the methods presented in the current specifications at home,showing that the curent specifications,in general,have undervalued the ultimate strength of the specimens with binding bars.

Key words: binding bar, square CFF stub column, bearing strength, ductilit