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（蘇州科技學院土木工程系 215011）
【提要】 手算法選擇壓彎浮竟件健挎時，往往要經(jīng)過多次尺寸調(diào)整后才能滿足強度、整體穩(wěn)定、局部穩(wěn)定、剛度幾方面的要求，計算過程既繁又慢，且不易得到最優(yōu)截面。為改進這一計算過程，給出了滿足設(shè)計條件的長細比，截面高寬比的迭代計算公式，編寫了相應(yīng)的截面優(yōu)化計算機程序。算例表明，用程序優(yōu)化設(shè)計的鋼壓彎構(gòu)件可比手算法節(jié)省鋼材12%左右。
【關(guān)鍵詞】 鋼結(jié)構(gòu) 壓彎構(gòu)【 軸心省抗構(gòu)件 焊接H形截面 截面優(yōu)化設(shè)計 計算機程序
Optimization Design of Steel Beamcolumns with Welded Hshaped Crosssections/
Fang Tian(Department of Civil Engineering, Suzhou Institute of Science and Technology, Suzhou 215011,China)
Abstract:When crosssections of steel beamcolumns are selected with traditional design method, several times size regulations are often required to meet the strength, overall stability, local stability and rigidity demand. The computation process is complicated and slow, and the optimum sections are rarely got in the final results. The interative calculation formulas
of slenderness ratio and section height to width ratio are deduced in accord with the design conditions, and the corresponding computer programs of crosssection optimization for the steel beamcolumns are written. Examples results show that about 12% steel can be saved when using the optimization design method.
Keywords:steel structure； compression members；welded Hshaped crosssections；cross sectional optimization；computer programs