碳纤维网格(CFN)加固RC双向板的抗弯性能试验  

Experimental study on flexural behavior of two-way RC slabs reinforced with CFN

作　　者：邓宗才[1] 程传超 朱晓楠 许小海 赵明月 Deng Zong-cai;Cheng Chuan-chao;Zhu Xiao-nan;Xu Xiao-hai;Zhao Ming-yue(Key Laboratory of Urban Security and Disaster Engineering,Ministry of Education,Beijing University of Technology,Beijing 100124,China;Carbon Composites(Tianjin)Co.Ltd,Tianjin 301700,China)

机构地区：[1]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [2]卡本复合材料(天津)有限公司,天津301700

出　　处：《工程抗震与加固改造》2020年第2期121-126,共6页Earthquake Resistant Engineering and Retrofitting

基　　金：国家科技部重点专项资助项目(2016YFB0303200)。

摘　　要：采用碳纤维网格(Carbon Fiber Net,CFN)加固系统对建筑结构进行加固修复可在几乎不改变结构截面尺寸的前提下提升结构的力学性能。为深入评估CFN加固RC板的抗弯性能,分别对3块配筋相同的RC双向板进行了四点弯曲加载试验,研究不同加固方式对RC板抗弯性能的影响规律。研究表明:CFN加固系统可实现与混凝土基面的有效粘接、共同受力;与未加固试件相比,CFN加固系统可有效限制RC板裂缝的发展,延缓试件破坏,弯曲韧性得到明显增强,并能显著提高RC板的极限承载力,保证RC板得到可靠的安全储备。研究结果为CFN加固混凝土结构的工程应用提供了技术支持。Strengthening and repairing the building structure with carbon fiber net(CFN) reinforcement system can improve the mechanical properties of the structure without changing the structural section size.In order to deeply evaluate the flexural behavior of two-way RC slabs strengthened with CFN,based on the four-point bending test of 3 two-way RC slabs with the same reinforcing bars,the effect of different reinforcement methods on the flexural behavior of RC slabs is researched.The research results show that CFN reinforcement system can bond and joint force with concrete base surface effectively.Compared with unreinforced slab,the CFN reinforcement system can effectively restrict the development of cracks in RC slab and delay the failure of specimens,which makes the bending toughness enhanced significantly.CFN reinforcement system also can significantly improve the ultimate bearing capacity of RC slabs,and the safety reserve of the RC board is fully guaranteed.The experimental results can provide technical support for engineering application of CFN reinforced concrete structure.

关 键 词：混凝土结构 碳纤维网格(CFN) 加固 抗弯性能 

分 类 号：TU375[建筑科学—结构工程]