【作者】 杨斌；

【导师】 徐新生；

【作者基本信息】 济南大学 ， 结构工程， 2012， 硕士

【摘要】 玻璃纤维筋、碳纤维筋、芳纶纤维筋应力-应变关系在失效前都呈线弹性变化，其中CFRP筋的弹性模量最高，但延性相对较差，造价最高；GFRP筋的延性较好，但弹性模量较低；AFRP筋的延性最好，但纤维与树脂的匹配性较差，为了解决单一纤维筋造价高、延性和弹性模量低的问题，目前研制出HFRP(Hybrid Fiber Reinforced Plastics)。HFRP筋是有两种或两种以上的连续增强纤维通过协调匹配，取长补短，产生协调混杂效应而制成的一种新型复合材料筋。HFRP筋不仅有较高的强度、模量和韧性，并且还可以减轻重量、降低成本、提高经济效益。本文在FRP、HFRP混凝土梁试验的基础上分别进行了有限元分析，研究的主要内容包括以下几个方面：1.试验方法研究HFRP筋的力学性能特点对CFRP、GFRP筋进行拉伸性能试验，得出FRP筋的力学性能指标，对HFRP筋试验应力-应变关系与FRP筋应力-应变关系进行对比，着重分析HFRP筋的混杂效应特点。2.用有限元法分析FRP筋混凝土梁的弯曲性能试验对FRP筋混凝土梁进行弯曲试验，并用Ansys来模拟FRP筋混凝土结构内力和变形发展的全过程，对模拟的全过程进行详细的介绍。对FRP筋混凝土梁进行延性分析，指出梁的破坏模型，提出新的延性定义，提出影响FRP筋混凝土梁延性的因素及改善梁延性的措施。3.用有限元法分析HFRP筋混凝土梁的弯曲性能试验对试验结果与计算结果进行对比，研究HFRP筋混凝土梁的变形和裂缝荷载的变化规律,总结预测HFRP筋混凝土梁裂缝间距和宽度的计算方法。更多还原

【Abstract】 Glass fiber reinforcement, carbon fiber, aromatic vinylon fiber reinforcementstress-strain relationship in failure before change is linear elastic.The elastic modulus of theCFRP tendons highest, but the ductility is relatively poor and cost is high.The ductility ofGFRP bars is better, but modulus of elasticity is lower.AFRP band ductility is best, but thefiber and resin matching is poor. In order to solve the problem of a single fiber for high costand low ductility and elastic modulus, we have developed HFRP. HFRP band is two or morethan two kinds of continuous fiber reinforced by matching each other, produce coordination,coordination of hybrid effect and made of a new type of composite rebars. HFRP band notonly has high strength, modulus and toughness, and also can reduce weight, reduce cost, raiseeconomic benefits. On the basis of the FRP and HFRP concrete beam test, I carry out finiteelement analysis. The main content of the study include the following:1. Experimental study on mechanical properties of HFRP barI carry out CFRP and GFRP tendon tensile performance test and come to the mechanicalproperties of FRP bars. The HFRP tendons test stress-strain relations with FRP bars stress-strain relationship is Compared. HFRP reinforced hybrid effect is analyzed.2. Finite element analyze FRP reinforced concrete beam bending testFRP reinforced concrete beam bending test is carried out. Using Ansys to simulate theFRP reinforced concrete structure internal force and deformation of the whole process ofdevelopment and detail simulation of the whole process. The ductility of FRP reinforcedconcrete beams is analyzed. Damage model of the beam and the ductility defined isproposed. The influence of FRP reinforced concrete beams ductility factor and improvementmeasures of beam ductility is pointed out.3. Finite element analyze HFRP reinforced concrete beam bending testI will compare test results with the calculated results and research of HFRP reinforcedconcrete beam deformation and crack load variation. At last I summarize HFRP reinforcedconcrete beam crack spacing and width calculation method.更多还原