轴压比对波纹侧板-方钢管混凝土柱抗震性能的影响研究

Research on the Influence of Axial Compression Ratio on the Seismic Performance of Corrugated Side Plate-Square Steel Tube Concrete Columns

为研究轴压比对波纹侧板-方钢管混凝土柱抗震性能的影响,使用ABAQUS软件建立了组合结构柱的有限元模型,通过破坏形态和滞回曲线等对模型的准确性进行了验证,运用参数模型讨论了不同轴压比对试件的破坏形态、滞回曲线、骨架曲线、压弯承载力和延性系数的影响。结果表明,随着轴压比增大,方钢管的高应力高度逐渐升高,波纹板的应力由水平分布变化为斜向分布;提高轴压比会使试件的压弯承载力和延性系数呈先升高后降低的趋势,建议轴压比不应超过0.30,满足规范中对延性系数的要求并在一定程度上提高结构的压弯承载力。通过合理控制轴压比,可以提升波纹侧板-方钢管混凝土柱抗震性,确保其在实际应用中的安全性和稳定性。

To investigate the influence of the axial compression ratio on the seismic performance of corrugated side plate-square steel tube concrete columns,a finite element model of the composite structural column was developed using ABAQUS software.The accuracy of the model was validated through failure modes and hysteresis curves.The parametric model was employed to analyze the effects of varying axial compression ratios on failure modes,hysteresis curves,skeleton curves,compressive bending capacity,and ductility coefficients of the specimens.The results indicate that as the axial compression ratio increases,the height of the high-stress region in the square steel tube gradually rises,and the stress distribution in the corrugated plate shifts from horizontal to oblique.Increasing the axial compression ratio initially improves the compressive bending capacity and ductility coefficient,but beyond a certain point,these values decrease.It is recommended that the axial compression ratio not exceed 0.30 to satisfy the ductility coefficient requirements in the specifications and to improve the compressive bending capacity of the structure to some extent.By optimally controlling the axial compression ratio,the seismic performance of corrugated side plate-square steel tube concrete columns can be enhanced,ensuring safety and stability in practical applications.