楔形钢框架柱的计算长度

本文在推导楔形框架柱计算长度公式时,采用具有足够精度的近似截面惯性矩,从而避开了楔形杆截面参数较多的不利因素,得到了楔形框架柱计算长度公式的解析解.所得结果与现行钢结构设计规范 GBJ17-88中等截面框架柱计算长度公式相衔接,适用于各类腹板呈线性变化的楔形框架柱.

Effective Length of Taepered Columns in Frame

In this paper,an approximate moment of inertia which is very close to the real moment of in ertia was used to take over the real moment of inertia of tapered member so as to avoid the disad vantageous factor that tapered members moment inertia is difficut to get.The formulas of effective length were developed with the approximate moment of inevtia and coincided with the formulas of primastic columns which were used in the specification of steel structure GBJ17-88.