负载下轴心受压钢筋混凝土柱加固后的受力性能

Mechanical Behavior of Loaded Reinforced Concrete Columns under Axial Compression

为了研究负载下轴压外包角钢加固钢筋混凝土柱的受力性能,分析了已有试验数据,通过控制初始应力水平和角钢的截面尺寸两个参数,用ABAQUS软件模拟并分析加固柱的受力状态,得出加固后钢筋混凝土柱的极限承载力.计算结果表明,极限承载力随着混凝土初始应力水平的增加而减小,随着角钢截面尺寸的增加而增加.根据混凝土结构规范设计,给出合理的角钢强度利用系数.

In order to study the mechanical behavior of reinforced concrete columns strengthened with axial compression angle steel under load,based on the analysis of the existing experimental data,the bearing capacity formula of the column under axial compression was deduced and the ABAQUS software was used to simulate and analyze the stress state of the reinforced column by controlling the initial stress level and the section size of the angle steel.The ultimate bearing capacity of the reinforced concrete column after reinforced was obtained.The calculated results show that the ultimate bearing capacity decreases with the increase of the initial stress level and increases with the increase of the section size of the angle steel.According to the standard design of concrete structure,reasonable utilization factor of angle strength was given.