- 摘 要
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（1 天津大學建筑設計研究院， 天津 300073； 2 中國建筑西南設計研究院， 成都 610042； 3 天津大學建筑工程學院， 天津 300072； 4 天津市建筑設計院， 天津 300074）
［摘要］橢圓弦支穹頂上部單層網殼曲面形狀一般為橢圓拋物面或橢球面，對比分析了兩種不同曲面形狀對大跨度扁平橢圓弦支穹頂結構性能的影響。研究表明，橢圓拋物面弦支穹頂?shù)慕Y構性能優(yōu)于橢球面弦支穹頂，大跨度扁平橢球面弦支穹頂不建議采用半橢球面作為上部網殼。當大跨度扁平橢圓弦支穹頂由穩(wěn)定承載力控制時，宜進行彈塑性穩(wěn)定分析，按彈塑性穩(wěn)定極限承載力安全系數(shù)2-0進行設計優(yōu)化；不建議只進行幾何非線性分析，按彈性穩(wěn)定極限承載力安全系數(shù)4-2進行設計優(yōu)化，這樣會造成較大的經濟浪費。
［關鍵詞］橢圓弦支穹頂； 曲面形狀； 橢圓拋物面； 橢球面； 彈塑性穩(wěn)定； 安全系數(shù)
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2017)23-0006-06
Structural performance contrast and elasto-plastic stability analysis of two elliptic suspendomes with different surface shapes
Yu Jinghai1, Wang Shaohua2, Wang Xiaodun3, Huang Zhaowei4, Li Luchuan1
(1 Architectural Design and Research Institute of Tianjin University, Tianjin 300073, China; 2 Southwest China Architectural Design & Research Institute, Chengdu 610042, China; 3 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 4 Tianjin Architectural Design Institute, Tianjin 300074, China)
Abstract:Elliptic paraboloid or ellipsoid is generally adopted in surface shape of the upper single layer reticulated shell of large-span flat elliptic paraboloid suspendome. The effects of the two surface shapes on structural performance of large-span flat elliptic paraboloid suspendome were compared and analyzed. The results show that structural performance of elliptic paraboloid suspendome is better than ellipsoid suspendome and half ellipsoid is not recommended in upper single layer reticulated shell of large-span flat elliptic paraboloid suspendome. If the large-span flat elliptic paraboloid suspendome is controlled by stability bearing capacity, it is appropriate to optimize design according to the coefficient of elasto-plastic stability bearing capacity which is 2-0; it is not recommended to just carry out geometric nonlinear analysis and optimize design according to the coefficient of elastic stability bearing capacity which is 4.2; otherwise it will cause large economic waste.
Keywords:elliptic suspendome; surface shape; elliptic paraboloid; ellipsoid; elasto-plastic stability; safety factor
*天津市科技支撐計劃重點項目（13ZCZDSF01400）。
作者簡介：于敬海，博士，研究員，博士生導師，Email:yjh300072@163.com。
