- 摘 要
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（廣東省建筑設計研究院， 廣州 510010）
［摘要］廣東現(xiàn)代廣告創(chuàng)意中心工程因建筑平面中部有一棟建筑需保留，導致該建筑上方的結構須做轉換。在分析了實腹梁轉換結構以及桁架轉換結構在本工程中存在的問題后，提出了一種新的轉換結構形式——拱轉換結構。與實腹梁相比較，拱轉換結構具有截面小、自重輕、豎向變形小等優(yōu)點；與桁架轉換結構相比，結構扭轉減小，樓層剛度突變減小。通過本工程實際案例分析可知，拱轉換結構受力具有以下特點：拱的受力控制工況為豎向荷載；拱軸力只有壓力；拱的第一階屈曲模態(tài)為面外失穩(wěn)；拱推力消散較快。轉換拱是本工程最關鍵的構件，針對該構件的設計，專門制定了相應的技術措施。大震分析以及節(jié)點應力分析結果反映這些措施給結構的安全可靠性提供了很好的保證。最后給出有關大樣節(jié)點圖，希望能給類似工程設計提供一些參考。
［關鍵詞］轉換拱； 轉換結構； 抗推系統(tǒng)； 鋼管混凝土
中圖分類號：TU375-5， TU318文獻標識碼：A文章編號：1002-848X(2016)21-0032-05
Study on structural design of transfer arch structure
Zhou Guilin, Chen Xing, Su Hengqiang, Dong Xiaoming, Wang Ruizhi, Lin Zhangyin
(Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)
Abstract:In order to preserve an historical building in the central plane of the Creative of Modern Advertising of Guangdong Province project, a transfer structure should be made to support the upper floors. After analyzing the limitations of solid web beam-transfer and truss-transfer structures in this project, a new transfer structural form was proposed, namely arch-transfer structure. Compared with solid web beam-transfer structure, arch-transfer structure has advantages of smaller cross-section, lighter weight and smaller vertical deformation. Compared with truss-transfer structure, arch-transfer structure has smaller torsional effect and smaller floor stiffness mutation. The case study of this project shows that the arch-transfer structure has following characteristics: vertical loading is the controlling working condition of the arch and the compression force is the only axial force in the arch. The first order buckling mode of the arch is out-of-plane stability. The arch thrust dissipates quickly. The transfer arch is the most important component of the construction. Specific technical measures were established for the structural design. The seismic analysis under rare earthquake and joint stress analysis results show that these measures provide a good guarantee for the safety and reliability of the structure. Finally, relevant joint detail drawings were provided to give some references for similar engineering designs.
Keywords:transfer arch structure; transfer structure; anti thrust system; concrete filled steel tube
作者簡介：周桂林，碩士，高級工程師，Email：zhglin2003@163.com。
