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(1 中國(guó)建筑東北設(shè)計(jì)研究院深圳分院，518031；2 東南大學(xué)，南京210096)

［提要］在鄭州新鄭國(guó)際機(jī)場(chǎng)改擴(kuò)建工程設(shè)計(jì)中使用了雙變截面箱型曲梁拉索（桿）組合結(jié)構(gòu)鋼屋蓋，鋼屋蓋通過斜支撐與下部混凝土結(jié)構(gòu)連接，斜支撐與雙變截面曲梁間通過一根圓鋼管相連。圓鋼管受到斜撐的上頂彎矩及兩側(cè)拉索的側(cè)拉力，應(yīng)力狀態(tài)很復(fù)雜。設(shè)計(jì)中根據(jù)鋼管梁支座計(jì)算的有關(guān)資料，在進(jìn)行手算分析的基礎(chǔ)上又進(jìn)行了有限元分析和試驗(yàn)驗(yàn)證。結(jié)果表明，鋼管梁的一些公式經(jīng)適當(dāng)變化后可用于該節(jié)點(diǎn)的計(jì)算分析，其結(jié)果對(duì)設(shè)計(jì)有一定的指導(dǎo)作用。

［關(guān)鍵詞］圓鋼管梁；下頂側(cè)拉式；圓鋼管節(jié)點(diǎn)

Bearing Capacity Analysis and Experiment of Cable of Round Steel Beam Joint in XinzhengAirdrome Engineering/Sui Qinghai1,Wu Yihong1,Shen Yubin1,Wu Jing2(1 China Northeast Architectural Design & Research Institute Shenzhen Branch, Shenzhen 518031,China; 2 Southeast University College,Nanjing 210096,China)

Abstract:The box and crooked steel beams  are used in the roof of Xinzheng International Airdrome.The roof is connected with the concrete structure below by tilted braces.The circular steel pipes connected the braces and curve beams with variational section bear the moments transferring from the braces and tensions from the cables. In design, bearing capacity of the joints is testified by FEM and experiment based on the calculation.The results show that the calculation formula of the steel pipe beam can be used to analyze the joints by reasonable revision.

Keywords:circular pipe beam; steel tube joint; bearing capacity; joint experiment