CFRP加固冷弯薄壁C型钢长构件的轴压承载力

doi:10.11835/j.issn.1674-4764.2017.03.007

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CFRP加固冷弯薄壁C型钢长构件的轴压承载力
DOI:
                        10.11835/j.issn.1674-4764.2017.03.007
                    
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                        唐红元唐红元
西华大学 建筑与土木工程学院, 成都 610039
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王灿军王灿军
西华大学 建筑与土木工程学院, 成都 610039
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潘毅潘毅
西南交通大学 土木工程学院, 成都 610031
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王忠凯王忠凯
西南交通大学 土木工程学院, 成都 610031
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胡志鹏胡志鹏
西华大学 建筑与土木工程学院, 成都 610039
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中图分类号:TU392.1;TU317.1
基金项目:国家自然科学基金（51108389）；国家留学基金（20123022）；国家重点研发计划（2016YFC0802205）

Axial compression of slender cold-formed thin-walled steel channels strengthened with CFRP

Author:

Tang Hongyuan
Tang Hongyuan
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, P. R. China
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Wang Canjun
Wang Canjun
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, P. R. China
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Pan Yi
Pan Yi
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
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Wang Zhongkai
Wang Zhongkai
School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, P. R. China
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Hu Zhipeng
Hu Zhipeng
School of Architecture and Civil Engineering, Xihua University, Chengdu 610039, P. R. China
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摘要:

为了研究CFRP加固冷弯薄壁C型钢长构件的承载能力，对腹板和翼缘均粘贴CFRP的试件进行了轴心受压加载试验。7根长度均为1 400 mm的试件，其中1根为未加固的控制试件，其余6根封闭缠绕外贴50 mm宽CFRP间距为50、100、150 mm 3种情况，层数为1层和2层。试验结果表明，在轴心荷载作用下的破坏模式为整体弯扭失稳，与控制试件相比，加固后试件的稳定极限承载力均有不同程度的提高；当CFRP间距与腹板高度的比值小于1时，加固效果较理想，且2层CFRP的加固效果好于1层。最后，采用有限元对模型进行数值模拟，对比试验数据和数值模拟结果，二者吻合较好。

关键词:冷弯薄壁C型钢;加固;整体稳定;轴心受压

Abstract:

To study the stability capacity of long cold-formed thin-wall channel columns reinforced with CFRP, the axial compression loading test was carried out on them with CFRP around their webs and flanges. Seven columns, which are 1 400 mm long each, are consisted with one initial specimen and six strengthened with 50 mm width CFRP. The CFRP space is divided into three sorts, 50 mm, 100 mm and 150mm. And the CFRP layer has two kinds:one and two layers. The experimental results show that the global buckling happens to all the specimens. All the ultimate bearing capacity of the reinforced members is improved in different degrees. Meanwhile, the effect of the reinforced specimens wrapped with two layers CFRP is better than the others wrapped with one layer CFRP. Finally, based on the experiment, the numerical simulation is carried out, and the test and numerical results show in good agreement.

Key words:cold-formed thin-wall channel column;strengthening;global buckling;axial compression

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引用本文

唐红元,王灿军,潘毅,王忠凯,胡志鹏. CFRP加固冷弯薄壁C型钢长构件的轴压承载力[J].土木与环境工程学报（中英文）,2017,39(3):50-57. Tang Hongyuan, Wang Canjun, Pan Yi, Wang Zhongkai, Hu Zhipeng. Axial compression of slender cold-formed thin-walled steel channels strengthened with CFRP[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2017,39(3):50-57.10.11835/j. issn.1674-4764.2017.03.007

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收稿日期:2016-09-04
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