钢结构轴心受压构件和压弯构件截面的直接设计法

A Direct Method for Design of the Cross-section of Steel Compression Members

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.

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.