论文部分内容阅读
为研究高强度钢材轴心受压构件的整体稳定受力性能,了解构件的几何初始缺陷和截面残余应力对其屈曲强度和失稳变形的影响,以及与普通强度钢材轴压杆相比高强度钢材柱的整体稳定性能对缺陷敏感性的变化,采用有限元方法进行数值模拟计算,通过变换几何初始缺陷系数、残余应力数值大小和钢材强度等参数,对计算结果进行对比分析。研究结果表明,随着钢材强度的提高,高强度钢材轴压杆的整体屈曲强度对初始缺陷的敏感性明显降低,特别是对残余应力分布的敏感性;此外,初始缺陷的影响还与构件的长细比有直接关系。研究工作进一步揭示了高强度钢材轴压柱整体稳定性能的特点和优势。
In order to study the overall stability of high-strength steel axial compression member of the force, to understand the initial geometric imperfections and cross-section residual stress on the buckling strength and instability deformation, as well as with the ordinary strength steel shaft bar compared to high strength The overall stability of the steel column can change the sensitivity of the defect. The finite element method is used to carry out the numerical simulation. By comparing the geometric initial defect coefficient, the residual stress value and the strength of the steel, the calculated results are compared and analyzed. The results show that with the increase of the strength of the steel, the overall buckling strength of the high-strength steel axial compression bar obviously decreases the sensitivity to the initial defects, especially to the residual stress distribution. In addition, Slender than have a direct relationship. Research work further reveals the characteristics and advantages of the overall stability of high-strength steel axial compression column.