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     姚  諫
    （浙江大學(xué)土木工程系  杭州 310027）

[提要] 鋼結(jié)構(gòu)的軸心受壓構(gòu)件和壓彎構(gòu)件應(yīng)用最廣，但其截面設(shè)計(jì)通常需采用試算法，不能一次完成。本文對(duì)軸心受壓構(gòu)件的截面設(shè)計(jì)采用已有的確定合適長(zhǎng)細(xì)比法，制成簡(jiǎn)單的兩張表格供查用，可一次確定合適的長(zhǎng)細(xì)比。對(duì)雙軸對(duì)稱截面的壓彎構(gòu)件采用等效軸心受壓荷載法，按軸心受壓構(gòu)件設(shè)計(jì)壓彎構(gòu)件的截面，可避免反復(fù)試算。
[關(guān)鍵詞]  軸心受壓鋼構(gòu)件 壓彎鋼構(gòu)件 合適長(zhǎng)細(xì)比 等效軸心受壓荷載

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