影响钢框架柱计算长度系数的因素

计算长度系数法避免了对结构做整体屈曲分析,因此得到广泛应用。钢框架柱的计算长度系数与多因素有关,体现在初始几何缺陷、荷载条件、节点连接刚度、支撑刚度、层间相互作用和二阶效应等方面。国内外的许多学者已经推导了一些框架柱的计算长度系数公式,但一般是在一定的假设条件下推导出来的,没有充分考虑影响框架柱的计算长度系数因素。通过综述这些因素的影响,为今后提出更精确的计算长度系数方法提供参考。

FACTORS AFFECTING EFFECTIVE LENGTH COEFFICIENT OF STEEL FRAME COLUMNS

Effective length coefficient method avoids the whole buckling analysis for structures, therefore, It is used widely. The effective length coefficient of a steel frame column is related to many factors, such as initial geometric imperfection, loading condition, node connecting stiffness, bracing stiffness, interstory interaction and second-order effect. Some effective length coefficient formulas for steel frame columns are deduced by many scholars in China and abroad, but they are usually deduced under some assumptions, without the full consideration of the factors affecting effective length coefficient of steel frame columns. These factors are summarized , they will be a reference for exploring more exact method compacting effective length coefficient.