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基于8个不同截面尺寸钢筋混凝土柱的单调加载试验,采用有限元软件ABAQUS对其进行了弯剪性能尺寸效应分析。通过合理选择材料本构关系及破坏准则,有限元分析得到的荷载-位移关系曲线与试验结果吻合较好。在此基础上进行了参数拓展分析,研究了截面尺寸和配箍形式对大截面尺寸的钢筋混凝土柱弯剪性能的影响,结果表明:当截面边长超过700mm时,试件的弯剪性能仍然存在尺寸效应,但随着截面尺寸的增大,尺寸效应减弱;减小箍筋直径和间距可以减弱尺寸效应对试件弯剪性能的影响。
Based on the monotonic loading test of eight reinforced concrete columns with different cross-sections, the shear-effect size-effect analysis was carried out by finite element software ABAQUS. By reasonably selecting the constitutive relation and failure criterion, the load-displacement curve obtained by finite element analysis is in good agreement with the experimental results. Based on this, the parameter expansion analysis is carried out. The influence of cross-section size and stirrup form on the shear properties of RC columns with large cross-section is studied. The results show that when the cross-section length exceeds 700 mm, But the size effect is weakened with the increase of cross-section size. Reducing the diameter and spacing of the stirrups can reduce the influence of the size effect on the shear-bending performance of the specimens.