摘要
本文的目的是对复合材料在混凝土中的应用进行研究。在绪论部分，主要阐述了本文的选题背景，选题的目的以及目前国内外的研究状况。第二章对复合材料的概念、分类及在建筑领域的应用进行了阐述，并对其在钢筋混凝土结构中的优越性进行了分析。第三章着重研究了复合结构在混凝土中的增强效应，包括复合结构对混凝土的增强效应，断裂韧度的提高效应，以及对钢筋的屈曲行为进行了研究。第四章主要是对混凝土中的复合材料进行了疲劳试验，并对其在反复荷载作用下的裂缝扩展行为进行了研究，并对其应力-应变特征进行了分析。第五章对已有的 RC结构进行了复合材料的加固和修补，主要包括 RC强度劣化的判断，以及 FRC材料对已有 RC结构的延性影响等。论文的结尾部分，对论文的主要内容作了简要的评述，并对论文的创新和应用价值作了简要的概括，同时也提出了本论文有待深入研究的问题。采用实验、理论和理论相结合的方法进行研究。通过对不同材料的对比分析，得出了复合材料在增强、刚度、抗疲劳等方面的明显优越性。但是，本文的结论也有一些不足之处，有待于进一步的完善和扩展。本项目的实施将为 RC构件的加固与修复提供坚实的理论基础与技术支撑，具有较高的理论与工程应用价值。
关键词：复合材料 钢筋混凝土 加固与修复 循环荷载
Abstract
The purpose of this paper is to study the application of composite materials in concrete. In the introduction part, mainly describes the background of the topic, the purpose of the topic and the current research status at home and abroad. In Chapter two, the concept, classification and application of composite materials in the field of architecture are described, and the advantages of composite materials in reinforced concrete structures are analyzed. The third chapter focuses on the reinforcement effect of composite structure in concrete, including the reinforcement effect of composite structure on concrete, the enhancement effect of fracture toughness, and the buckling behavior of reinforcement bar. In Chapter 4, the fatigue test of composite materials in concrete is carried out, and the crack propagation behavior under repeated load is studied, and the stress-strain characteristics are analyzed. In Chapter 5, the existing RC structures are reinforced and repaired by composite materials, including the judgment of deterioration of RC strength and the influence of FRC materials on the ductility of existing RC structures. At the end of the thesis, the main content of the thesis is reviewed briefly, and the innovation and application value of the thesis are summarized briefly, and the problems to be further studied are also put forward. Experiments, theories and theories are combined to conduct research. Through the comparative analysis of different materials, the obvious advantages of composite materials in strengthening, stiffness and fatigue resistance are obtained. However, the conclusion of this paper also has some shortcomings, which need to be further perfected and expanded. The implementation of this project will provide a solid theoretical foundation and technical support for the reinforcement and repair of RC components, which has high theoretical and engineering application value.
Key words: Composite reinforced concrete reinforcement and repair of cyclic load
目录
第一章前言 1
第二章 复合材料的应用及优势 2
2.1复合材料的定义和种类 2
2.2复合材料在建筑工程中的应用 2
2.3复合材料在结构中的优势 2
第三章 复合材料应用于混凝土中的改善效果 4
3.1 复合材料增强效果研究 4
3.2 断裂韧性改善效果研究 4
3.3 钢筋屈服性能分析 5
第四章 复合材料应用于混凝土中的疲劳性能研究 6
4.1循环荷载下的裂纹扩张特性研究 6
4.2循环荷载下的应力-应变特性分析 6
第五章 既有钢筋砼结构的补强 7
5.1对钢筋混凝土在地震作用下的强度劣化的诊断 7
5.2既有结构的受力及延展特性研究 8
第六章 结论 8
参考文献 10
致谢 11
