FRP约束钢骨再生混凝土柱的力学性能研究

With the development of the global economy, more and more waste concretes were created. How to make reuse of the waste concretes and improve the low strength and poor durability of recycled aggregate has become one of the research hotspots of scholars in different countries. Combined with the advantages of FRP confined concrete and steel reinforced concrete, a new type element of FRP confined steel reinforced recycled concrete composite column is proposed in this project, and it will be green environmental protection and have excellent mechanical behaviors. The axial compression and eccentric compression tests on the FRP confined steel reinforced concrete columns with different design parameters are planned to carry out to study the interaction mechanism of FRP tube, recycled concrete and shaped steel by comparing the test results with the theoretical analysis. The parameter optimization principle of the composite columns will be established by combining the refined numerical simulation and modern optimization algorithm. Based on the theoretical analysis, a simplified calculation model and a bearing capacity calculation formula of FRP confined steel reinforced recycled concrete columns will be established. The seismic behavior of FRP confined steel reinforced concrete column is analyzed by pseudo-static test, and the basic performance of the new composite column should be systematically studied. This project provides a new idea for the engineering application of recycled concrete， and the research results provide basis for engineering application and designing method of this new composite column.

随着全球经济的发展，废弃混凝土日益增多，如何进行二次利用并改善再生骨料强度低，耐久性差的不足，已成为国内外学者研究热点之一。本项目结合FRP约束混凝土和钢骨混凝土的优点，将钢骨置于FRP约束再生混凝土内，形成绿色、环保、力学性能优良的FRP约束钢骨再生混凝土新型组合柱，拟对不同设计参数的FRP约束钢骨再生混凝土柱进行轴心受压和偏心受压试验，通过对比试验和理论分析，对FRP管、再生混凝土和钢骨的相互作用机理进行研究，结合精细化数值模拟和现代优化算法，确立FRP约束钢骨再生混凝土柱的参数优选原则，同时基于理论分析建立FRP约束钢骨再生混凝土柱的简化计算模型和承载力计算公式；并通过低周反复荷载试验，对FRP约束钢骨再生混凝土柱的抗震性能进行分析，从而对该新型组合柱的基本性能展开系统深入的研究。本项目为再生混凝土的应用提供了新的思路，研究成果为该新型组合柱在工程中的应用和设计方法的研究提供依据。

随着全球经济的发展，废弃混凝土日益增多，如何进行二次利用并改善再生骨料强度低，耐久性差的不足，已成为国内外学者研究热点之一。本项目结合FRP约束混凝土和钢骨混凝土的优点，将钢骨置于FRP约束再生混凝土内，形成绿色、环保、力学性能优良的FRP约束钢骨再生混凝土新型组合柱，拟对不同设计参数的FRP约束钢骨再生混凝土柱进行轴心受压和偏心受压试验，通过对比试验和理论分析，对FRP管、再生混凝土和钢骨的相互作用机理进行研究，结合精细化数值模拟和现代优化算法，确立FRP约束钢骨再生混凝土柱的参数优选原则，同时基于理论分析建立FRP约束钢骨再生混凝土柱的简化计算模型和承载力计算公式；并通过低周反复荷载试验，对FRP约束钢骨再生混凝土柱的抗震性能进行分析，从而对该新型组合柱的基本性能展开系统深入的研究。本项目为再生混凝土的应用提供了新的思路，研究成果为该新型组合柱在工程中的应用和设计方法的研究提供依据。