嵌入式FRP加固钢筋混凝土梁抗弯性能研究

发布时间：2018-01-07 04:29

本文关键词：嵌入式FRP加固钢筋混凝土梁抗弯性能研究　出处：《东北大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着人们对建筑物的功能和强度要求的不断提高,对现有建筑物的修复和加固越来越引起人们的重视。由于FRP材料具有轻质、高强、耐腐蚀和抗疲劳等优点,被广泛用于建筑物的修复和加固之中。嵌入式FRP加固技术是在外贴式FRP加固技术的基础上发展而来的,具有表面处理工作量小、抗冲击性及防火性能好等优点。但是,嵌入式FRP加固技术作为一项新兴的加固技术,其设计与计算方法还需要进一步的研究,对此,本文利用理论分析、数理统计及数值模拟的方法对嵌入式FRP加固混凝土梁的抗弯性能进行研究,具体内容如下：(1)通过对已有嵌入式FRP加固混凝土梁粘结性能试验的总结,分析了混凝土强度、粘结剂种类、开槽尺寸及位置、粘结长度等因素对嵌入式FRP与混凝土之间粘结性能的影响,在此基础上研究了嵌入式FRP与混凝土的剥离承载力,并给出其计算公式。(2)在对已有嵌入式FRP加固混凝土梁抗弯承载力研究结果进行分析总结的基础上,结合本文前期建立的嵌入式FRP与混凝土的剥离承载力计算公式,给出嵌入式FRP加固混凝土梁抗弯承载力的设计与计算公式,并通过大量试验数据对公式准确性进行了验证；(3)分析嵌入式FRP加固混凝土梁的抗弯刚度变化规律,结合普通钢筋混凝土梁抗弯刚度的计算方法,在抗弯刚度计算中引入FRP的作用,给出了嵌入式FRP加固梁抗弯刚度的计算公式；(4)利用数值模拟的方法,对影响嵌入式FRP加固混凝土梁抗弯性能的主要因素进行了研究,指出各因素对加固梁抗弯性能的具体影响规律。
[Abstract]:With the demand function and the intensity of buildings continue to improve, repair and reinforcement of existing buildings have attracted more and more attention. Because the FRP material has the advantages of light weight, high strength, corrosion resistance and fatigue resistance and other advantages, is widely used in building repair and reinforcement. The reinforcement technology of embedded FRP development based on type FRP in reinforcement technology, has the advantages of small amount of surface treatment, impact resistance and good fireproof performance. However, the embedded FRP reinforcement as a new reinforcement technique, the design and calculating method also needs further study, this analysis based on the theory and method of mathematical statistics and Numerical Simulation Research on the flexural performance of RC beam reinforcement of embedded FRP, the specific contents are as follows: (1) through the reinforcement beams bonding property of existing embedded FRP summary, analysis The strength of concrete, binder type, slot size and position, affecting the bond length on the bond performance between concrete and embedded FRP, based on the embedded FRP stripping and concrete bearing capacity, and its calculation formulas are also presented. (2) in the study on the bearing capacity were analyzed on the basis of the existing embedded FRP reinforced concrete beam bending, the bearing capacity calculation formula of stripping combined with embedded FRP this paper pre established and concrete, are embedded FRP reinforcement design and calculation formula of flexural bearing capacity of concrete beams, and through a large number of experimental data of the formula is validated; (3) analysis of embedded FRP reinforcement law of concrete beam flexural rigidity with the change of flexural reinforced concrete beam stiffness calculation method, the introduction of FRP in the calculation of the bending stiffness of the role, given the embedded FRP reinforced beam The calculation formula of flexural rigidity; (4) by using the numerical simulation method, the main influence factors on the embedded FRP reinforcement of flexural performance of concrete beams is studied, pointed out that the specific influence on the flexural behavior of reinforced factors.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU375.1

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