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

卷:

28卷

期数:

2011年04期

页码:

48-54

栏目:

出版日期:

2011-12-20

文章信息/Info

Title:

Experimental Research on Rehabilitation with CFRP Sheets for ReinforcedConcrete Columns After Exposure to Fire

作者:

李俊华,于长海,唐跃锋,刘明哲,萧寒

宁波大学 建筑工程与环境学院,浙江 宁波 315211

Author(s):

LI Jun-hua, YU Chang-hai, TANG Yue-feng, LIU Ming-zhe, XIAO Han

School of Civil Engineering and Environment, Ningbo University, Ningbo 315211, Zhejiang, China

关键词:

火灾;  CFRP布;  加固;  钢筋混凝土柱;  力学性能;  承载力

Keywords:

fire;  carbon fiber reinforced polymer sheet;  rehabilitation;  reinforced concrete column;  mechanical behavior;  load bearing capacity

分类号:

TU375.3

DOI:

-

文献标志码:

A

摘要:

通过3根碳纤维增强复合材料(CFRP)布加固ISO 834标准火灾作用后钢筋混凝土柱的性能试验以及3根ISO 834标准火灾作用后未加固的钢筋混凝土柱和3根常温下钢筋混凝土柱的对比试验,研究了CFRP布加固火灾后钢筋混凝土柱的有效性。试验结果表明:CFRP布加固对火灾后钢筋混凝土柱的刚度修复有一定作用,但刚度提高程度有限,从开始加载到荷载达到80%极限荷载的不同加载水平下,加固后轴压试件的轴压刚度与常温下试件刚度的比值在0.25～0.39之间,偏压试件的抗弯刚度与常温下试件刚度的比值在0.14～0.31之间。CFRP布加固对火灾后试件的承载力提高作用较为显著,能将试件的承载力提高至受火后承载力的1.67～2.37倍,但与常温下试件的承载力相比,依然有一定差距,加固后试件的承载力水平为常温下试件的0.54～0.67倍。

Abstract:

By tests on three reinforced concrete columns repaired by carbon fiber reinforced polymer (CFRP)sheets after exposure to ISO 834 standard fire and three reinforced concrete columns without being repaired after exposure to ISO 834 standard fire as well as three reinforced concrete columns without exposure to fire, the rehabilitation effectiveness of CFRP sheets was investigated. Experimental results show that the rigidity of the reinforced concrete columns after exposure to fire can be enhanced to some extent by CFRP sheets, but the enhancement is not apparent. In various loading stages from the initial loading to 80% ultimate load, the ratio of axial rigidity of axial compression specimens rehabilitated by CFRP sheets and that at normal temperature ranges from 0.25 to 0.39, and the ratio of flexural rigidity of the eccentric specimens rehabilitated by CFRP sheets and that at normal temperature ranges from 0.14 to 0.39. Compared with the influence on rigidity, the influence of CFRP sheets on load bearing capacity is more remarkable. The load bearing capacity of the specimens rehabilitated by the CFRP sheets can be enhanced from 1.67 times to 2.37 times of that without being repaired. But compared with the specimens without exposure to fire, the load bearing capacity of reinforced concrete columns after exposure to fire which are repaired by CFRP sheets are still lower, the ratio of the load bearing capacity of specimens rehabilitated by CFRP sheets at normal temperature is from 0.54 times to 0.67 times.

参考文献/References:

[1] 姚 谏.FRP复合材料加固混凝土结构新技术研究进展[J].科技通报,2004,20(3):216-221. YAO Jian.Research Advance in FRP-strengthened RC Structures[J].Bulletin of Science and Technol- ogy,2004,20(3):216-221.
[2]余 琼,陆洲导.纤维材料环向缠绕加固混凝土偏压柱受力性能研究(Ⅰ)[J].四川建筑科学研究,2009,35(5):49-53. YU Qiong,LU Zhou-dao.Research on the Static Performance of RC Eccentric Column Strengthened with Circumferential FRP(Ⅰ)[J].Sichuan Building Science,2009,35(5):49-53.
[3] HUSSEIN M,FAWZY T M.Structural Performance of CFRP-strengthened RC Slabs in a Corrosive En- vironment[J].Journal of Composites for Construction,2010,14(6):865-869.
[4]PARVIN A,ALTAY S,YALCIN C,et al.CFRP Rehabilitation of Concrete Frame Joints with Inadequate Shear and Anchorage Details[J].Journal of Composites for Construction,2010,14(1):72-82.
[5]徐志胜,郭新伟,张 焱.碳纤维布加固火灾后足尺钢筋混凝土梁的试验研究[J].火灾科学,2005,14(1):35-40. XU Zhi-sheng,GUO Xin-wei,ZHANG Yan.Experiment on Using CFRP to Strengthen Full-scale Reinforced Concrete Beam After Fire[J].Fire Safety Science,2005,14(1):35-40.
[6]徐志胜,冯 凯,张威振,等.CFRP加固钢筋混凝土梁火灾后的试验研究[J].哈尔滨工业大学学报,2005,37(1):98-100. XU Zhi-sheng,FENG Kai,ZHANG Wei-zhen,et al.Experimental Analysis of CFRP Used to Strengthen RC Beam After Fire[J].Journal of Harbin Institute of Technology,2005,37(1):98-100.
[7]李耀庄,唐义军.碳纤维布加固高温作用后的连续梁试验研究和功能可靠度分析[J].火灾科学,2005,14(4):234-238. LI Yao-zhuang,TANG Yi-jun.Experiment Study and Function Reliability Analysis on RC Continuous Beam Subject to High Temperature and Strengthened with CFRP Sheets[J].Fire Safety Science,2005,14(4):234-238.
[8]项 凯,余江滔,陆洲导,等.碳纤维布加固火灾后钢筋混凝土连续梁的试验研究[J].四川大学学报:工程科学 版,2010,42(2):52-57. XIANG Kai,YU Jiang-tao,LU Zhou-dao,et al.Experimental Research on Carbon Fiber Reinforced Poly-mer Sheets Strengthened Fire-damaged Reinforced Concrete Continuous Beams[J].Journal of Sichuan University:Engineering Science Edition,2010,42(2):52-57.
[9]王李果,陆洲导,绳钦柱.采用碳纤维加固火灾后预应力混凝土框架的试验研究[J].火灾科学,2003,12(4):218-223. WANG Li-guo,LU Zhou-dao,SHENG Qin-zhu.Experimental Research on Prestressed Concrete Frame After High Temperature Rehabilitated by CFRP[J].Fire Safety Science,2003,12(4):218-223.
[10]BLONTROCK H,TAERWE L,VANDEVELDE P.Fire Tests on Concrete Beams Strengthened with Fiber Composites Laminates[C]//ICEE.Proceedings of the Third International PhD Symposium.Vienna:ICEE,2000:151-161.
[11]WILLIAMS B K.Fire Performance of FRP-strengthened Reinforced Concrete Flexural Members [D].Kingston:Queen's University,2004.
[12] KODUR V K R,BISBY L A,GREEN M F.Preliminary Guidance for the Design of FRP-strengthened Concrete Members Exposed to Fire[J].Journal of Fire Protection Engineering,2007,17(1):5-26.
[13]高皖杨,胡克旭,陆洲导.火灾下碳纤维布加固钢筋混凝土梁非线性分析[J].同济大学学报:自然科学版,2009,37 (5):575-582. GAO Wan-yang,HU Ke-xu,LU Zhou-dao.Nonlinear Analysis of Insulated Carbon Fiber Reinforced Polymer Strengthened Reinforced Concrete Beams in Fire[J].Journal of Tongji University:Natural Science,2009,37 (5):575-582.
[14]高皖杨,胡克旭,陆洲导.CFRP加固钢筋混凝土梁耐火性能试验研究[J].土木工程学报,2010,43(3):15-23. GAO Wan-yang,HU Ke-xu,LU Zhou-dao.Fire Resistance Experiments of Insulated CFRP Strengthened Reinforced Concrete Beams[J].China Civil Engineering Journal,2010,43(3):15-23.
[15]张柳煜,邬晓光,李启乾.粘贴加固材料厚度与钢筋混凝土T梁极限承载力分析[J].筑路机械与施工机械化,2010,27 (7):67-69. ZHANG Liu-yu,WU Xiao-guang,LI Qi-qian.Analysis on Thickness of Reinforcement Material and Ul-timate Bearing Capacity of RC T-section Beams Strengthened with Steel Plate and CFRP[J].Road Machinery & Construction Mechanization,2010,27(7):67-69.
[16]刘 涛.碳纤维布在桥梁维修加固中的应用[J].筑路机械与施工机械化,2008,25(6):60-61. LIU Tao.Application of Carbon Cloth in Bridge Reinforcing[J].Road Machinery & Construction Mech- anization,2008,25(6):60-61.
[17]林荣安,于金良,翟敏刚.碳纤维材料在桥梁加固中的应用[J].筑路机械与施工机械化,2007,24(5):38-40. LIN Rong-an,YU Jin-liang,ZHAI Min-gang.Application of Carbon Fibre Material in Bridge Strengthens [J].Road Machinery & Construction Mechanization,2007,24(5):38-40.

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备注/Memo

备注/Memo:

收稿日期:2011-08-06
基金项目:国家自然科学基金项目(50908118); 宁波市自然科学基金项目(2010A610079)
作者简介:李俊华(1977-),男,湖南安仁人,副教授,工学博士,E-mail:lijunhua@nbu.edu.cn。

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更新日期/Last Update: 2011-12-20