论文部分内容阅读
为模拟组合双对称部分横截面包裹的钢混柱,将其假设成等效横截面的钢柱,目的是进行线弹性分析。后者由实际的钢的断面与两个附加板组成。一个附加板在1/2高度处垂直于腹板,另一个在12宽度处垂直于翼缘。板的尺寸取决于组合截面的抗压能力和主轴弯曲刚度。根据实际截面的几何尺寸,考虑钢、混凝土、钢筋材料的性能,用截面平衡列出三个代数方程确定附加板的尺寸。对这些方程以近似的形式忽略了对主轴刚度的微小贡献进行求解。本文方法是精确、有效和便捷的,它具有广泛适应常用线弹性钢结构分析软件和不需要有限元模拟的优势。
In order to simulate the steel composite columns with double symmetrical cross-section, the steel columns were assumed to be equivalent cross-section for the purpose of linear elastic analysis. The latter consists of the actual steel section with two additional plates. One additional plate is perpendicular to the web at 1/2 height and the other is perpendicular to the flange at 12 widths. The size of the plate depends on the compressive strength of the combined section and the bending stiffness of the spindle. Based on the geometry of the actual section, considering the properties of the steel, concrete, and reinforcing steel, three algebraic equations are listed by section balance to determine the size of the additional board. These equations are approximated by neglecting the slight contribution to the spindle stiffness. The method presented in this paper is accurate, efficient and convenient. It has the advantage of widely adapting the commonly used linear elastic steel structure analysis software and without the need of finite element simulation.