两种T形异截面钢柱受力性能有限元研究

Finite element study on mechanical properties of T-shaped steel columns with different sections

为研究工程应用中的复杂异形截面钢柱受力性能,采用ABAQUS软件建立了两种T形截面钢柱的有限元模型,即对称与非对称的T形截面。通过分析构件的破坏形式、侧向刚度变化、骨架曲线、延性性能等关键参数的变化,探究了在不同加载方式下异形截面钢柱的受力性能。分析结果表明:该类T形截面柱沿Z方向受力具有较好的延性和良好的耗能性能,结构屈曲部位在距离柱脚边缘处以及柱中间区段腹板处;沿X轴方向耗能性能相对较弱,延性欠佳,结构的屈曲部位在T形柱中肋的柱脚区域处,并根据研究结果提出了相关设计建议。

In order to study the mechanical properties of complex special-section steel columns in engineering applications,finite element models of T-section steel columns were established by using ABAQUS software.The mechanical properties of four special-section steel columns under different loading modes were explored by analyzing the changes of key parameters such as the failure forms of the members,lateral stiffness changes,skeleton curves and ductility properties.The results show that this type of T-section column has good ductility and energy dissipation along the Z direction,and the buckling part of the column is located at the edge of the column foot and the web of the middle section of the column.In the X-axis direction,the energy dissipation performance is relatively weak,the ductility is not good,and the buckling part of the structure is in the column foot area of the T-shaped column.Based on the research results,some design suggestions are put forward.