FRP筋与钢筋混合配筋混凝土梁受弯性能的数值分析

发布时间：2022-07-15 17:11

　　纤维增强复合材料（Fiber Reinforced Polymer,FRP）具有抗拉强度高、强重比高、耐腐蚀性好等优异性能。使用FRP筋替代混凝土结构中的钢筋,可以解决钢筋混凝土结构的腐蚀问题。但由于FRP筋是一种线弹性材料,仅配置FRP筋作为纵筋的混凝土梁破坏形式为脆性破坏。同时由于FRP筋弹性模量较低、粘结性能较弱,结构易于产生较大的变形与裂缝。因此,研究人员提出在混凝土梁中同时配置线弹性的FRP筋与弹塑性的钢筋以提升混凝土梁的受弯性能。目前的FRP筋相关研究多集中于CFRP与GFRP,而对AFRP的相关研究还比较少。AFRP的弹性模量高,耐磨性好,适合作为混凝土结构的筋材。本文通过建立有限元模型,研究了同时配置AFRP筋与钢筋作为受拉筋的混凝土梁的受弯性能,并分析了其破坏模式与承载能力。本文的研究内容如下:（1）基于现有试验研究的几何属性与材料性能,建立了混合配筋混凝土梁的有限元模型。数值模拟的结果表明,本文所建立的模型准确性较高,可以预测混合配筋混凝土梁的受弯承载力,可以近似反映其荷载-跨中位移关系（2）基于有限元模型,分析了混凝土抗压强度、纵筋种类、纵筋直径与混合配筋率对混合... 

【文章页数】：79 页

【学位级别】：硕士

【文章目录】：
摘要
Abstract
Notations
Chapter 1 Introduction
    1.1 Background
    1.2 Fiber Reinforced Polymer
        1.2.1 FRP constituents:Resin
        1.2.2 FRP constituents:Fillers and additives
        1.2.3 Various types of FRP:Carbon Fiber Reinforced Polymer(CFRP)
        1.2.4 Glass Fiber Reinforced Polymer(GFRP)
        1.2.5 Basalt Fiber Reinforced Polymer(BFRP)
        1.2.6 Aramid Fiber Reinforced Polymers(AFRP)
        1.2.7 Hybrid FRP systems
        1.2.8 Advantages and Applications of FRP bars
        1.2.9 Limitations of FRP bars
    1.3 Literature review
    1.4 Aim and Objectives
    1.5 Structure of the Thesis
Chapter 2 Model definition& properties of the materials
    2.1 Outline of the simulated experimental program
    2.2 Finite element model definition
    2.3 Mechanical properties of materials
        2.3.1 Concrete
        2.3.2 Steel reinforcement and steel plates
        2.3.3 Aramid Fiber Reinforced Polymer
    2.4 Evaluating terms of Hybrid FRP systems
        2.4.1 Deflection at mid-span
        2.4.2 First cracking moment
        2.4.3 Flexural Strength
        2.4.4 Crack Width
        2.4.5 Deformability
    2.5 Summary
Chapter 3Finite Element Modeling
    3.1 Introduction
    3.2 DIANA FEA BV
    3.3 Beam shape and materials assignment
    3.4 Elements type
        3.4.1 Solid Element for modeling Concrete and Steel plates
        3.4.2 Truss Element for Steel and FRP reinforcements
    3.5 Material modeling
        3.5.1 Concrete
        3.5.2 Steel,FRP reinforcements& Steel plates
    3.6 Meshing
    3.7 Boundary Conditions,Loading and support plates
    3.8 Solution Algorithm
    3.9 Summary
Chapter 4Results and Discussions of the FEM
    4.1 Analysis of FEM Results
    4.2 Parametric study
        4.2.1 Effect of Compressive strength
        4.2.2 Effect of Reinforcement type
        4.2.3 Effect of Reinforcement size
        4.2.4 Effect of reinforcement ratio
    4.3 Analysis of failure modes
    4.4 Summary
结论
Conclusions(In English)
References
Acknowledgment
Resume


【参考文献】：
期刊论文
[1]混凝土桥梁的耐久性维护方法[J]. 屈文俊,张誉.  铁道学报. 2001(01)



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