- 摘 要
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（1 天津大學(xué)建筑工程學(xué)院，天津 300072； 2 濱海土木工程結(jié)構(gòu)與安全教育部重點實驗室，天津 300072； 3 天津大學(xué)建筑設(shè)計研究院， 天津 300073）
［摘要］天津米立方建筑造型為橢球面，根據(jù)建筑造型提出型鋼拱、雙層網(wǎng)殼、拱支單層網(wǎng)殼三種結(jié)構(gòu)體系方案并進(jìn)行了初步的對比分析，綜合考慮各方面因素后最終選用拱支單層網(wǎng)殼結(jié)構(gòu)體系。建立結(jié)構(gòu)ANSYS有限元模型，對結(jié)構(gòu)在各種荷載組合下進(jìn)行了靜力分析、自振特性分析以及振型分解反應(yīng)譜分析，得到了結(jié)構(gòu)的受力、變形、振型以及抗震性能的特性。對不考慮檁條作用以及考慮檁條作用的結(jié)構(gòu)分別進(jìn)行了雙重非線性穩(wěn)定分析，結(jié)果表明，不考慮檁條時雙重非線性穩(wěn)定分析的穩(wěn)定系數(shù)大于2，結(jié)構(gòu)中檁條使得結(jié)構(gòu)的整體穩(wěn)定性提高了1/3。
［關(guān)鍵詞］橢球面; 拱支單層網(wǎng)殼; 自振特性; 譜分析; 整體穩(wěn)定; 雙重非線性
中圖分類號：TU393.3 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)10-0051-05
Structural design and analysis of an ellipsoidal single-layer reticulated shell supported by spatial arch trusses
Chen Zhihua1,2, Chen Binbin1, Yan Xiangyu3, Liu Hongbo1, Yu Jinghai3
(1 School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2 Key Laboratory of Coastal Civil Engineering Structure and Safety, Ministry of Education, Tianjin 300072, China;
3 Tianjin University Research Institute of Architectural Design, Tianjin 300073, China)
Abstract: An ellipsoidal roof is adopted as the architectural design of Tianjin Rice Grain Cube. Three different structural system schemes were put forward according to the architectural design and compared, including section steel arches, double-layer reticulated shell and arch-supported single-layer reticulated shell. The arch-supported single-layer reticulated shell system was adopted considering all the factors. The ANSYS finite element model of the structure was established. Static analysis was conducted under all kinds of load combinations, as well as the natural vibration characteristic analysis and the response spectrum analysis. Stress characteristics, deformation, vibration modes and seismic performance characteristics were obtained. Dual nonlinear analyses of the structure with purlins and without purlins were carried out respectively, and the results show that the stability factor of the structure without purlins is greater than 2 and purlins improve structure overall stability by 1/3.
Keywords: ellipsoidal roof; arch-supported single-layer reticulated shell; natural vibration characteristic; response spectrum analysis; overall stability; dual nonlinear
*國家自然科學(xué)基金項目（51208355）,天津大學(xué)自主創(chuàng)新基金（60304025）,天津大學(xué)自主創(chuàng)新基金（60307001）。
作者簡介：陳志華，教授，博導(dǎo)， Email:zhchen@tju.edu.cn。
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