\r邓宗才¹，程传超¹，朱晓楠²，许小海²，赵明月\r²\r
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AuthorsHTML:\r邓宗才¹，程传超¹，朱晓楠²，许小海²，赵明月\r²\r
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AuthorsListE:\rDeng Zongcai ¹，Cheng Chuanchao ¹，Zhu Xiaonan ²，Xu Xiaohai ²，Zhao Mingyue\r ²\r
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AuthorsHTMLE:\rDeng Zongcai ¹，Cheng Chuanchao ¹，Zhu Xiaonan ²，Xu Xiaohai ²，Zhao Mingyue\r ²\r
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Unit:\r1. 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\r
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Unit_EngLish:\r1. Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education，Beijing University of Technology，Beijing 100124，China；
2. Carbon Composites(Tianjin)Co.，Ltd.，Tianjin 301700，China\r
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Abstract_Chinese:\r采用碳纤维网格(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．为了深入评估CFN 加固砌体结构的抗震性能，通过对4 片无筋砌体墙进行低周往复加载试验，研究了不同加固方式对砌体结构破坏形态、承载力、滞回曲线、刚度退化、延性和耗能能力等特性的影响规律．研究表明：各加固墙体破坏时，CFN 加固系统未发生明显剥离，能与墙体基面有效黏结、协同工作；未加固墙体与加固墙体破坏模式不同，未加固墙体呈脆性剪切破坏，单面加固墙体呈延性较好的剪切破坏，双面加固墙体呈延性优良的弯剪破坏；CFN 加固系统限裂能力强，能有效抑制墙体主裂缝的发展，保障墙体的完整性，提高可修复性；与未加固墙体相比，各加固墙体极限承载力、延性和耗能能力均有明显提高，其中双面CFN 加固墙体的效果最显著，极限承载力提高87.0%，延性系数提高52.2%，加载后期同一位移下耗能能力最强；单面CFN 加固、双面CFN 加固和双面CFN 加固并端部锚固墙体初始刚度大，分别为未加固墙体的1.11、2.38、1.64 倍，各加固墙体刚度退化较未加固墙体有明显后滞且破坏刚度均大于未加固墙体；墙体双面加固并对CFN 端部钢条压铆，抗震效果强于单面加固但弱于墙体双面加固．研究结果可为CFN加固砌体结构的工程应用提供技术支持．\r
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Abstract_English:\rStrengthening and repairing a building structure with a carbon fiber net(CFN)reinforcement system can improve its mechanical performance without changing the sizes of the component sections．To comprehensively evaluate the seismic performance of a masonry structure trengthened with CFN，we designed four non-rebar masonry walls and performed low-cycle reversed loading tests to investigate the effect of different reinforcement methods on the failure modes，bearing capacity，hysteretic curves，stiffness degradation，ductility，and energy dissipation capacity of the masonry structure．The results show that CFN reinforcement system does not peel off significantly when the reinforced walls are damaged，and it bonds and works effectively with the base of the wall．The damage modes differ for unreinforced and reinforced walls；unreinforced wall experience brittle shear failure，single-sided reinforced wall exhibit good ductile shear failure，and double-sided reinforced walls exhibit bending shear failure with excellent ductility．A CFN reinforcement system can effectively limit cracks and can inhibit the development of main cracks in the wall，ensures its integrity，and improves the reparability of the wall．Compared with unrein forced walls，the ultimate bearing capacity，ductility，and energy consumption of reinforced walls are improved significantly．The effect on double-sided CFN reinforced wall is the most significant，increasing the ultimate bearing capacity by 87.0% and the ductility coefficient by 52.2%，and the energy consumption capacity is the strongest at the same displacement in the later loading stage．Single-sided，double-sided and double-sided CFN reinforced walls with end anchoring have greater initial stiffness，i.e. 1.11，2.38，1.64 times that of an unreinforced wall，respectively．The stiffness of each reinforced wall has obvious lag compared with an unreinforced wall and the failure stiffness is greater than that of the unreinforced wall．The seismic effect of the double-sided CFN reinforced wall with end anchoring is stronger than that of the single-sided reinforced wall but weaker than that of the double-sided reinforced wall．These experimental results provide technical support for the engineering application of masonry structures reinforced with CFN．\r
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Keyword_Chinese:砌体结构；碳纤维网格；抗震加固；低周往复试验；加固方式\r

Keywords_English:masonry structure；carbon fiber net(CFN)；seismic reinforcement；low cycle reversed loading test；reinforcement method\r


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