- 摘 要
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(蘇州科技學院土木工程系，蘇州 215011)
［摘要］現(xiàn)有的變翼緣寬度鋼梁的設(shè)計方法只適用于梁受均布荷載的情況。為找到最優(yōu)的變截面位置，推導了變翼緣寬度鋼梁截面優(yōu)化設(shè)計的步驟及通用公式，編寫了相應(yīng)的鋼梁截面優(yōu)化計算機程序。算例表明，變翼緣寬度鋼梁的最優(yōu)截面變更位置是在離梁支座約l/6～l/4的地方，用文中程序設(shè)計的鋼梁可比手算法節(jié)省鋼材10%左右。
［關(guān)鍵詞］鋼結(jié)構(gòu)；變翼緣寬度鋼梁；截面優(yōu)化設(shè)計；計算機程序
Optimum design of steel girders with variable flange widthFang Tian(Dept.of Civil Engineering,Suzhou Institute of Science and Technology,Suzhou 215011,China)
Abstract:The design method introduced in various existing references for steel girders with variable flange width is only suitable for the case of member subjected to uniformly distributed load.The steps and general formulas for optimum design of cross sections of steel girders with variable flange width are deduced to find out the optimal position of changing cross section, and corresponding computer programs are compiled.Examples show that the optimal position of changing cross section is about l/6～l/4 from the supports, and when steel girders are designed with the suggested computer programs, about 10% steel can be saved compared with t
hose designed by hand calculation method.Keywords:steel girders; variable flange width; optimum design; cross sections; computer program
作者簡介：方恬，碩士，副教授,Email:fangtian53@163.com。
參考文獻
［1］GB50017—2003鋼結(jié)構(gòu)設(shè)計規(guī)范［S］.北京：中國建筑工業(yè)出版社，2003.
［2］方恬.鋼梁截面優(yōu)化計算機程序［C］∥中國鋼結(jié)構(gòu)協(xié)會穩(wěn)定與疲勞分會2002年學術(shù)會議論文.鋼結(jié)構(gòu)，2002增刊.
［3］王肇民.建筑鋼結(jié)構(gòu)設(shè)計［M］.上海：同濟大學出版社，2001.
