- 摘 要
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朱彥鵬 王秀麗
（甘肅工業(yè)大學(xué)建筑工程系 蘭州 730050）[提要] 同時(shí)選取平板網(wǎng)架的高度、網(wǎng)格數(shù)及桿件截面面積、結(jié)點(diǎn)體積作為設(shè)計(jì)變量，以網(wǎng)架的總造價(jià)最低為目標(biāo)函數(shù)，按新規(guī)范要求對網(wǎng)架的外形及桿件截面面積、結(jié)點(diǎn)體積進(jìn)行綜合優(yōu)化設(shè)計(jì)，并考慮了豎向及水平地震作用，提出了網(wǎng)架抗震設(shè)計(jì)的建議。內(nèi)力分析采用空間桁架位移法，優(yōu)化方法采用直接試驗(yàn)法的網(wǎng)格法和廣義滿應(yīng)力準(zhǔn)則法相結(jié)合的方法，并編制了SPCOD( FOR-TRAN 77)程序，在Sun75GX工作站上實(shí)現(xiàn)。該法與傳統(tǒng)設(shè)計(jì)相比，可節(jié)約造價(jià)10%左右。
[關(guān)鍵詞] 平板網(wǎng)架 數(shù)學(xué)模型 空間桁架位移法 綜合優(yōu)化設(shè)計(jì) 優(yōu)化程序The Height, the number of network and the cross-section of the bar for the space truss structure are taken as the design variables; and the total cost of the truss structure is taken as the objective function. According to the new "truss structure cord", the comprehensive optimum design method of the shape and cross- section for the space truss structure is adopted; the horizantal and vertical earthquake load is considered. The finite element method is used for the space truss structures; the organic combination of the direct searching and criteria method is adopted as the optimum method; and the "SPCOD" is programmed for the optimum design of the space truss structure.
Keywords: slab-space truss; mathematical mode; optimization; program
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