基于 ABAQUS 的钢筋混凝土单侧加固柱受力性能模拟分析

为研究旧钢筋混凝土柱单侧加固后的受力性能,文章采用 ABAQUS 有限元软件,针对其不同加固截面尺寸、不同侧向力方向、不同初始轴压比等情形,进行单调水平荷载作用下的模拟分析,并与未加固旧柱对比。研究结果表明:加固后钢筋混凝土柱在 2 个主轴方向侧向承载力显著提高,且随加固截面尺寸的增大而提高,但延性变化不显著;轴压比越大,柱在 2 个主轴方向的侧向承载力提高越显著,但后期延性下降更明显。

In order to study the mechanical performance of the old reinforced concrete column after unilateral reinforcement, simulation analysis was conducted with different reinforced section sizes, different lateral force directions and different initial axial compression ratios under monotonic horizontal load using ABAQUS finite element software. Compared with unreinforced old columns, the results show that the lateral bearing capacity of reinforced concrete columns in the two main axis directions significantly increases after reinforcement, and increases with the increase of the size of the reinforced section, but the ductility does not change significantly; the greater the axial compression ratio, the more significant the increase in the lateral bearing capacity in the two main axis directions, but the later ductility decreases more significantly.