应用高性能材料提高结构性能是结构技术发展的重要方向。本项目从“用好好材料”出发提出了一种新型增强混凝土用组件——复材约束预应力混凝土芯棒（FCCCPR）。FCCCPR由复材缠绕管、高强混凝土和高强钢筋及锚具组成；复材缠绕管约束和保护内部混凝土和钢筋，对中心的高强钢筋施加预拉力，使高强混凝土预先受压。此组件充分发挥高强材料的性能，可获得承载力和延性高、刚度大、施工方便等优势。将FCCCPR配置在混凝土柱中，可增强其受力性能，具有广泛的应用前景。本项目将在三个层面开展研究：在组件层面，研究FCCCPR单调和反复拉压的性能、与外部混凝土的粘结锚固性能；在构件层面，研究配置FCCCPR混凝土柱的静力和滞回性能；在结构层面，研究配置FCCCPR的RC框架的性能；最终建立一系列设计方法。通过本项目研究，将揭示高性能材料组合工作机理，解决工程应用关键技术难题，为提升混凝土结构综合性能提供有效技术手段。

An important trend of structural engineering technology is to employ high-performance materials to improve structural performance. Based on the creed, "to make good use of good materials", an innovative component for reinforcement of concrete -- fiber-reinforced polymer confined concrete core with pre-stressed rebar (FCCCPR), is proposed in this project. A FCCCPR component is composed of a filament wound FRP tube, filled-in high-strength concrete, and a high-strength steel rebar with pre-stressed anchorage. The filament wound FRP tube with the fiber in hoop direction mainly provides the confinement and the protection for concrete and steel rebar. Pre-tension force is applied to the high-strength steel rebar in the center; thereby the high-strength concrete will achieve pre-pressure. Thus, the high-strength materials in FCCCPR are utilized sufficiently, as the result, it obtains the advantages of high bearing capacity and ductility, higher stiffness, and convenience of construction. FCCCPR as reinforcements in concrete columns can enhance the mechanical behaviors and has a wide application prospect. This project will carry out study at three levels, including: at the component level, the monotonic and cyclic tension /compression behaviors of FCCCPR, the bond behavior and anchorage to external concrete; at the element level, the static and hysteretic performance of concrete columns reinforced with FCCCPR; at the structure level, the performance of RC frames employing FCCCPR; and finally, a series of design methods are to be established. The targets of this study are to reveal the working mechanism of the composed high performance materials, to solve critical technical problems for applications, and to provide an effective technical approach for enhancing the overall performance of concrete structures.