姚  谏
    （浙江大学土木工程系  杭州 310027）

[提要] 钢结构的轴心受压构件和压弯构件应用最广，但其截面设计通常需采用试算法，不能一次完成。本文对轴心受压构件的截面设计采用已有的确定合适长细比法，制成简单的两张表格供查用，可一次确定合适的长细比。对双轴对称截面的压弯构件采用等效轴心受压荷载法，按轴心受压构件设计压弯构件的截面，可避免反复试算。
[关键词]  轴心受压钢构件 压弯钢构件 合适长细比 等效轴心受压荷载

The steel axially loaded compression members and beam - columns are widely used in practical engineering, but the proportioning of their cross - sections is usually done by trial method before. For axially loaded compression members, an appropriate slenderness - ratio should be assumed by trial for proportioning of its cross - section. Two brief tables are now given in this paper for the correct choice of the appropriate slenderness - ratio without trial. For double symmetrical cross - sections of beam - columns, the equivalent axial load is introduced and the cross - section may thus be proportioned as an axially loaded member. The methods are very simple. Three illustrative examples are worked out in this paper.
Keywords: steel axially loaded compression members; beam - columns; appropriate slenderness - ratio; equivalent axial load