基于ANSYS的CFRP加固钢筋混凝土柱的轴压比分析

轴压比是影响钢筋混凝土柱结构受力性能的重要因素,本文主要研究了这种因素对钢筋混凝土柱以及CFRP加固后钢筋混凝土柱的力学性能的影响.通过用ANSYS有限元分析软件模拟低周反复位移加载,分析在不同轴压比条件下试件的力学性能.通过研究,本文建议在地震区钢筋混凝土柱的轴压比不大于0.6,这样就可以保证在钢筋混凝土柱的极限承载力得到一定程度提高的同时,其延性不会降低太多;在使用CFRP“围束条带两层＋纵向条带两层＋末端两层锚固”的方式加固后,其力学性能得到了不同程度的改善,轴压比的增大虽然使柱的变形能力减弱,但柱的水平承载力得到了显著提高,并进一步激发了纤维布对混凝土的约束作用,提高了纤维布的加固效果.

Analysis of axial compression ratio on reinforced concrete columns reinforced with CFRP based on ANSYS

Axial compression ratio is an important factor to affect the reinforced concrete column structure performance,the paper mainly studies the impact of such factors on the mechanical properties of reinforced concrete columns and CFRP strengthened reinforced concrete columns. By using ANSYS finite element analysis software to simulate low cycle repeated displacement loaded,analyzed the mechanical properties of the specimen in the axial compression ratio conditions. Through research, recommended pressure ratio is not greater than 0.6 earthquake zone axis of the reinforced concrete columns, so as to ensure the ultimate bearing capacity of reinforced concrete columns to some extent improve the ductility does not decrease too much; in the use of CFRP “the reinforcement of the horizontal bar with two layers ＋ vertical bar with two floors ＋ end of the two-anchor” ,its mechanical properties have been improved to vatting degrees,the increase of axial compression ratio column deformation capacity weakened, but the column level the carrying capacity has been significantly improved, and further stimulated the the fiber cloth constraints concrete role in enhancing the fiber reinforcement effect.