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（中南建筑設計院股份有限公司，武漢 430071)

［摘要］長江防洪模型大廳干流大廳主體部分單跨90m，長450m，采用120m跨鋼管提籃拱+吊桿+90m跨預應力網(wǎng)架雜交空間結構。通過采用提籃拱及其吊桿作為屋蓋網(wǎng)架的中間支座，將網(wǎng)架單向90m跨受力變?yōu)殡p向90m×90m受力，充分發(fā)揮了網(wǎng)架空間受力的優(yōu)勢；并在網(wǎng)架下弦設置預應力拉索，提高了結構的空間剛度；這些措施使該工程取得了較好的經(jīng)濟效益和建筑效果。重點介紹了結構選型、布置及分析，以及拱基礎和預應力鋼結構節(jié)點及網(wǎng)架支座的設計。

［關鍵詞］鋼管拱；鋼網(wǎng)架；預應力；雜交結構；空間結構

Design and analysis of Changjiang River Model Hall structure

Li Ting, Liu Bingqing, Jian Huicheng, Li Hongsheng, Luo Shunxin（Central-south Architecture Design Institute, Wuhan 430071, China）

Abstract:Changjiang River Model Hall is 90m wide and 450m long. A new type of hybridized structure is brought forward and applied to this hall, which is constituted of an 120m span steel arch, suspender and a 90m span prestressed grid structure. Through the middle support by the arch and suspender, the grid structure is transformed from uniaxial bending to biaxial bending, and the advantage of space performance is realized. Otherwise, prestressed cable is mounted under the lower chord of the grid to enhance the structure stiffness. All those methods lead to a better architecture appearance and a cheaper cost. The structure type selection, structure layout and analysis, arch base design and the grid support design are introduced.

Keywords:steel pipe arch; steel grid structure; prestress; hybridized structure; space structure

作者簡介：李霆，教授級高級工程師，一級注冊結構工程師，Email：Lting@vip.sina.com。

參考文獻

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［2］MAKOWSKI Z S. 平板網(wǎng)架分析、設計與施工［M］. 劉錫良，譯.天津：天津大學版社，2000.

［3］周臻，孟少平，吳京. 拱支預應力網(wǎng)架結構的預應力全過程分析方法［J］. 工程力學, 2007(12): 93-99.

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