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廣饒國際博覽中心弦支網殼屋蓋結構設計
馬青1,陳志華1,2,閆翔宇3,周翠竹4
摘 要

(1天津大學建筑工程學院, 天津 300072;2 天津大學濱海土木工程結構與安全教育部重點實驗室, 天津 300072;3 天津大學建筑設計規劃研究總院, 天津 300073; 4 天津市建筑設計院, 天津 300074)

[摘要]廣饒國際博覽中心展廳屋蓋為長軸126m、短軸56m的橢球形,對此屋蓋結構進行了方案比選,主要對比了雙層網殼、拱桁架-單層網殼和弦支網殼結構體系,綜合考慮受力性能、造價、工期等因素后選定了弦支網殼結構方案。分析了作用于結構的恒荷載、活荷載、風荷載、溫度作用以及地震作用等,并對各種工況進行組合;闡述了拉索預應力設定的原則,給出了主要拉索的預應力取值;分析了結構的靜力、動力性能,得到了在結構在設計組合下的應力和位移,結果表明,結構材料利用率較高且有一定安全儲備。對結構進行了穩定分析,在考慮幾何非線性情況下結構的穩定能滿足規范要求,為其他類似工程提供參考。

[關鍵詞]廣饒國際博覽中心; 弦支網殼; 靜力分析; 動力分析; 預應力

中圖分類號:TU318, TU399文獻標識碼:A文章編號:1002-848X(2019)04-0013-06

 

Structural design of cable-supported reticulated shell roof of Guangrao International Expo Center

Ma Qing1, Chen Zhihua1,2, Yan Xiangyu3, Zhou Cuizhu4

(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China;  2 Binhai Civil Engineering Structure and Security Key Laboratory of The Ministry of Education, Tianjin University, Tianjin 300072, China;  3 Tianjin University Research Institute of Architectural Design, Tianjin 300073, China; 4 Tianjin Architecture Design Institute, Tianjin 300074, China)

Abstract:The roof of Guangrao International Expo Center exhibition hall is an ellipsoid with 126m major axis and 56m minor axis. The schemes of this roof structure were compared, including structural systems of double-layer reticulated shell, arch-truss single-layer reticulated shell and cable-supported reticulated shell. The structural scheme of cable-supported reticulated shell was selected after considering the mechanical properties, cost and construction period. The dead load, live load, wind load, temperature effect and earthquake actionapplied on the structure were analyzed, and combinations of all load cases was presented. The principle  design for prestress of the cables was expounded, and the prestress value of the cables was given. The static and dynamic performances of the structure were analyzed, and the stress and displacement under design combinations were obtained. The results show that the utilization ratio of structural materials is high and there is a certain safety reserve. The stability analysis of the structure was carried out, and the stability considering the geometric nonlinearity can meet the requirements of the code, which could provide reference for other similar projects.

Keywords:Guangrao International Expo Center; cable-supported reticulated shell; static analysis; dynamic analysis; prestress

 
作者簡介:馬青,博士研究生,Email:[email protected]
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