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总结纤维布加固钢筋混凝土轴心受压柱的研究成果,分析实际工程中需加固的钢筋混凝土柱的受力与《公路桥梁加固设计规范》JTG/TJ22-2008之间存在的差异,文章在选择合理锚固方式的前提下,应用弹性力学理论,分析二次受力情况下纤维布加固钢筋混凝土轴心受压构件的受力机理,探讨初始加载大小对加固效果的影响。在考虑加固材料的利用率的基础上,得出纤维布加固钢筋混凝土轴心受压构件的抗压强度计算公式,并与《规范》中轴心受压加固柱的正截面承载力进行比较,得出二次受力加固柱的承载力计算值偏安全,更接近工程实际。
This paper summarizes the research results of fiber reinforced plastic (CFRP) columns subjected to axial compression and analyzes the difference between the force of reinforced concrete columns to be reinforced and the JTG / TJ22-2008 Code for Design of Bridge Reinforcement in actual projects. Reasonable anchoring mode, the elastic mechanics theory is applied to analyze the stress mechanism of reinforced concrete members under axial load and the effect of initial load on the reinforcement effect. Based on the utilization ratio of reinforced materials, the compressive strength formula of reinforced concrete member under axial compression was obtained and compared with the normal cross-sectional bearing capacity of the column under axial load. It is concluded that the calculated value of the bearing capacity of the second column strengthened by force is biased and safer, which is closer to the actual project.