本文選題：碳纖維布 + 加固��； 參考：《大連海事大學》2014年碩士論文

【摘要】：碳纖維加固技術(shù)是近年在土木工程中新出現(xiàn)的一項結(jié)構(gòu)加固技術(shù)。由于其具有密度小、強度高、耐腐蝕、施工操作簡單等優(yōu)點,一經(jīng)出現(xiàn)便被廣泛應用。碳纖維加固鋼筋混凝土技術(shù)即將碳纖維材料粘貼在所需加固的鋼筋混凝土結(jié)構(gòu)構(gòu)件的外表面,.使碳纖維材料和鋼筋混凝土構(gòu)件共同承受荷載,從而達到提高構(gòu)件承載能力、加固構(gòu)件的作用。本文利用有限元法,針對碳纖維布加固鋼筋混凝土梁開展參數(shù)分析,主要內(nèi)容包括：綜述了幾種常用的鋼筋混凝土結(jié)構(gòu)加固方法,并主要介紹碳纖維布加固法的原理,施工方法和優(yōu)點。建立適于分析碳纖維布加固鋼筋混凝土構(gòu)件力學性能的有限元數(shù)值模型,介紹有限元模型中混凝土、鋼筋、碳纖維布的本構(gòu)關系和單元類型。分析粘貼碳纖維布對鋼筋混凝土梁抗彎性能的影響。驗證數(shù)值模型的正確性并深入研究碳纖維布加固層數(shù)(厚度)、梁彎剪區(qū)域的碳纖維布加固長度、混凝土強度等級和縱筋配筋率等設計參數(shù)對加固梁體抗彎性能的影響。分析粘貼碳纖維布對鋼筋混凝土梁抗剪性能的影響。通過分析鋼筋混凝土梁發(fā)生剪切破壞時斜截面的受力特點和破壞形態(tài),揭示碳纖維布在梁抗剪切破壞中的作用機理,并進一步研究加固粘貼碳纖維布的寬度、間距、層數(shù)(厚度)、混凝土強度等級、箍筋配箍率和梁體剪跨比等設計參數(shù)對加固梁體抗剪性能的影響�？偨Y(jié)各個設計參數(shù)對加固鋼筋混凝土梁抗彎曲破壞和抗剪切破壞影響程度,為碳纖維布加固法在實際工程中的應用提供參考。
[Abstract]:Carbon fiber reinforcement technology is a new structural strengthening technology in civil engineering in recent years. Because of its advantages of low density, high strength, corrosion resistance and simple construction operation, it is widely used once it appears. Carbon fiber reinforced concrete technology the carbon fiber material is pasted on the external surface of the reinforced concrete structural member which needs to be strengthened. The carbon fiber material and the reinforced concrete member are subjected to the load together so as to improve the bearing capacity of the member and strengthen the function of the member. In this paper, the finite element method is used to analyze the parameters of reinforced concrete beams strengthened with CFRP sheets. The main contents are as follows: several commonly used reinforcement methods of reinforced concrete structures are summarized, and the principle of CFRP reinforcement method is mainly introduced. Construction methods and advantages. A finite element numerical model is established to analyze the mechanical properties of reinforced concrete members strengthened with carbon fiber sheets. The constitutive relations and element types of concrete, steel bars and carbon fiber sheets in the finite element model are introduced. The effect of bonded carbon fiber sheets on the flexural behavior of reinforced concrete beams is analyzed. The validity of the numerical model is verified and the effects of the design parameters such as the thickness of CFRP reinforced concrete strength grade of concrete and reinforcement ratio of longitudinal reinforcement on the flexural behavior of strengthened beams are studied in depth such as the number of layers (thickness) the length of CFRP reinforcement in the flexural shear region of beams and the strength grade of concrete and the reinforcement ratio of longitudinal reinforcement. The effect of bonded carbon fiber sheet on shear resistance of reinforced concrete beams is analyzed. By analyzing the stress characteristics and failure patterns of oblique section in shear failure of reinforced concrete beams, the mechanism of the action of CFRP sheets on shear failure of beams is revealed, and the width and spacing of CFRP sheets strengthened with CFRP sheets are further studied. The influence of the design parameters such as the number of layers (thickness), the strength grade of concrete, the ratio of stirrups and the shear span ratio of beams on the shear resistance of strengthened beams. The influence of various design parameters on the flexural failure and shear failure of reinforced concrete beams is summarized, which provides a reference for the application of CFRP reinforcement method in practical engineering.
【學位授予單位】：大連海事大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU375.1

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本文編號：2084560