碳纤维片材加固火灾后钢筋混凝土梁抗弯承载力  

FLEXURAL STRENGTHENING OF REINFORCED CONCRETE BEAMS AFTER FIRE WITH CARBON FIBER SHEET

作　　者：项凯[1] 王国辉[1] 

机构地区：[1]公安部天津消防研究所,天津300381

出　　处：《建筑技术》2013年第11期987-991,共5页Architecture Technology

基　　金："十二五"国家科技支撑计划资助项目(2011BAK03B0104)

摘　　要：研究碳纤维片材加固火灾后钢筋混凝土梁抗弯承载力的计算方法,采用截面分析法分析碳纤维片材加固火灾后钢筋混凝土梁的抗弯承载力。考虑的火灾作用位置包括受拉区受火和受压区受火,提出了碳纤维片材加固火灾后钢筋混凝土梁的计算方法,建议了碳纤维片材的允许应变值,并根据试验结果对提出的计算方法进行了验证。结果表明,本文的计算方法可较准确地计算碳纤维片材加固火灾后钢筋混凝土梁的抗弯承载力,计算值有一定的安全储备。In order to research the calculating method of flexural capacity for fire-damaged reinforced concrete(RC) beams with carbon fiber reinforced polymer(CFRP) sheets strengthening, the flexural capacity of fire-damaged beam was analyzed with cross section analysis.The fire exposed region includes tensile region and compressive region.A procedure was developed for quantifying the amount of bending moment of fire-damaged RC beams with an external strengthening CFRP sheets.A modified maximum strain CFRP equation was recommended.The proposed method was verified under the experimental results as well.The results show that the proposed approach is capable of predicting bending moment of fire-damaged RC beams with an accuracy that is sufficient for design purposes.

关 键 词：火灾 碳纤维片材 混凝土梁 抗弯承载力 加固 

分 类 号：TU755[建筑科学—建筑技术科学]