碳纤维布加固局部强度不足混凝土柱轴压性能的有限元分析

发布时间：2018-06-11 12:47

本文选题：ABAQUS + CFRP　；参考：《建筑结构》2016年S2期

【摘要】：利用ABAQUS有限元软件分析了碳纤维布加固局部强度不足混凝土柱的受力性能。对加固前后不同区域混凝土的变形情况和应力-应变关系曲线、钢筋和箍筋的变形情况和应力-应变关系曲线以及混凝土柱整体的荷载-位移曲线做对比分析。研究结果表明,碳纤维布对加固区域混凝土可以产生明显的约束作用,增强混凝土柱整体抵抗变形的能力。对局部强度不足区域的混凝土裂缝发展有明显的抑制作用,可小幅度的提高混凝土柱的极限承载力。当碳纤维布层数超过3层时,增加层数仅对混凝土柱延性性能有影响,对其承载力的提高无明显作用。
[Abstract]:Using Abaqus finite element software, the mechanical behavior of concrete columns with insufficient local strength strengthened with carbon fiber sheets is analyzed. The deformation and stress-strain curves of concrete in different regions before and after reinforcement, the deformation and stress-strain relation curves of steel bars and stirrups, and the load-displacement curves of concrete columns are compared and analyzed. The results show that the carbon fiber sheet can obviously restrain the concrete and enhance the ability of resisting the deformation of concrete columns as a whole. It can obviously restrain the development of concrete crack in the area with insufficient local strength, and can improve the ultimate bearing capacity of concrete column to a small extent. When the number of layers of carbon fiber is more than 3 layers, increasing the number of layers only has an effect on the ductility of concrete columns, but has no obvious effect on the improvement of the bearing capacity of concrete columns.
【作者单位】：西安科技大学;
【基金】：国家青年自然科学基金(5140081218),锈蚀钢筋混凝土柱抗剪性能研究
【分类号】：TU37

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