[1]左志亮,蔡健,朱昌宏.带约束拉杆L形钢管混凝土短柱的偏压试验研究[J].东南大学学报(自然科学版),2010,40(2):346-351.[doi:10.3969/j.issn.1001-0505.2010.02.025]
 Zuo Zhiliang,Cai Jian,Zhu Changhong.Experimental research on L-shape CFT stub columns with binding bars subjected to eccentric compression[J].Journal of Southeast University (Natural Science Edition),2010,40(2):346-351.[doi:10.3969/j.issn.1001-0505.2010.02.025]
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带约束拉杆L形钢管混凝土短柱的偏压试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第2期
页码:
346-351
栏目:
土木工程
出版日期:
2010-03-20

文章信息/Info

Title:
Experimental research on L-shape CFT stub columns with binding bars subjected to eccentric compression
作者:
左志亮1 蔡健12 朱昌宏1
1 华南理工大学土木工程系,广州 510641; 2 华南理工大学亚热带建筑科学国家重点实验室,广州 510641
Author(s):
Zuo Zhiliang1 Cai Jian12 Zhu Changhong1
1 Civil Engineering Department, South China University of Technology, Guangzhou 510641, China
2 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510641, China
关键词:
L形 钢管混凝土 短柱 约束拉杆 偏压
Keywords:
L-shape concrete-filled steel tube stub column binding bars eccentric compression
分类号:
TU398
DOI:
10.3969/j.issn.1001-0505.2010.02.025
摘要:
对8个带约束拉杆L形钢管混凝土偏压短柱试件进行了试验研究,讨论其在不同约束拉杆设置、偏心率以及荷载角下的偏压性能.结果表明,约束拉杆的设置改变了钢管的屈曲模态,延迟了局部屈曲的发生,有助于L形钢管混凝土偏压短柱的承载力和延性的提高.在加载后期,处于加载肢的拉杆比处于非加载肢的拉杆对核心混凝土的约束作用明显,其中双列拉杆试件的肢端拉杆比肢内拉杆的约束作用更大.临近或达到极限承载力后,近力侧钢管壁对核心混凝土的约束作用较明显.利用纤维模型法计算的试件偏压极限承载力结果与试验结果吻合良好.
Abstract:
Eight L-shape concrete-filled steel tubular(L-CFT)stub columns with binding bars subjected to eccentric compression were tested. The influences of the setting of binding bars, load eccentricity, and load angles on the behaviors of L-CFT stub columns with binding bars are investigated. The experimental results indicate that by setting the binding bars the buckling mode of the steel plates can be changed; the local buckling of the steel plates can be delayed and the bearing capacity and the ductility of eccentric-loaded specimens are improved. At the late loading stage, binding bars set in the loading side have more obvious effect on constraining the core concrete than that set in the non-loading side, and the binding bars set close to the end of loading side have more restriction effect than that set inside in the case of specimens with two columns of binding bars. Steel plates close to the end of loading side have obvious effect on constraining the core concrete when approaching or reaching the ultimate bearing capacity. The predicted results by the fiber model method agree well with experimental ones.

参考文献/References:

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[7] 蔡健,孙刚.轴压下带约束拉杆L形钢管混凝土短柱的试验研究[J].土木工程学报,2008,41(9):14-20.
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备注/Memo

备注/Memo:
作者简介: 左志亮(1982—),男,博士生; 蔡健(联系人),男,博士,教授,博士生导师, cvjcai@scut.edu.cn.
基金项目: 国家自然科学基金资助项目(50878087).
引文格式: 左志亮,蔡健,朱昌宏.带约束拉杆L形钢管混凝土短柱的偏压试验研究[J].东南大学学报:自然科学版,2010,40(2):346-351. [doi:10.3969/j.issn.1001-0505.2010.02.025]
更新日期/Last Update: 2010-03-20