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（1 北京工業(yè)大學(xué)建筑工程學(xué)院， 北京 100124； 2 中冶京誠工程技術(shù)有限公司， 北京 100176；3 華誠博遠(yuǎn)工程技術(shù)集團(tuán)有限公司， 北京 100052）
［摘要］在闡述《鋼結(jié)構(gòu)設(shè)計(jì)標(biāo)準(zhǔn)》（GB 50017—2017）等規(guī)范中與空間網(wǎng)格結(jié)構(gòu)設(shè)計(jì)相關(guān)的穩(wěn)定性設(shè)計(jì)規(guī)定的基礎(chǔ)上，以某跨度為155m的含預(yù)應(yīng)力索的空間拱桁架結(jié)構(gòu)為例，對直接分析法和有效長度法的設(shè)計(jì)結(jié)果進(jìn)行了比較。結(jié)果顯示，在按應(yīng)力比1.1進(jìn)行計(jì)算長度法設(shè)計(jì)之后，再采用直接分析法進(jìn)行桿件的驗(yàn)算和截面微調(diào)，可以使結(jié)構(gòu)既滿足直接分析法穩(wěn)定性要求，又可較應(yīng)力比為1.0的計(jì)算長度法設(shè)計(jì)結(jié)果節(jié)省4.5%的用鋼量。
［關(guān)鍵詞］直接分析法； 大跨度； 鋼結(jié)構(gòu)； 預(yù)應(yīng)力索； 空間拱桁架
中圖分類號(hào)：TU318+.1文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)01-0045-05
Application of direct analysis design method in cable structure design
YU Zheng1,2, XUE Suduo1, WANG Lijun3
(1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2 MCC Capital Engineering & Research Incorporation Limited, Beijing 100176, China; 3 Huachengboyuan Engineering Technology Group Co., Ltd., Beijing 100052, China)
Abstract:Based on the description of the Standard for design of steel structures (GB 50017—2017) and other specifications related to the stability design requirements of the spatial grid structure design, a 155m-span arch truss structure containing prestressed cables was taken as an example, the design results of the direct analysis method and the effective length method were compared. The results show that after the direct analysis method is used for checking calculations and section adjustments of the members designed according to the effective length method with the stress ratio of 1.1, the structure can meet the stability requirements of the direct analysis method, and comparing with the the design result of the effective length method with the stress ratio of 1.0, the steel quantity can be optimized by 4.5%.
Keywords:direct analysis method; large span; steel structure; prestressed cable; space arch truss
作者簡介：于征，博士，研究員，Email: yuzheng@ceri.com.cn。
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