- 摘 要
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（1 中國民航大學(xué)機(jī)場學(xué)院， 天津 300300； 2 天津市建筑設(shè)計(jì)院， 天津300074）
［摘要］介紹了天津?yàn)I海國際機(jī)場T2航站樓鋼屋蓋的基本概況、結(jié)構(gòu)特點(diǎn)與設(shè)計(jì)參數(shù)。計(jì)算了屋蓋各分區(qū)結(jié)構(gòu)的自振周期與桿件最大應(yīng)力比，計(jì)算結(jié)果表明，結(jié)構(gòu)設(shè)計(jì)在滿足控制應(yīng)力比的基礎(chǔ)上最大程度地提高了材料的利用率。結(jié)構(gòu)上、下弦桿截面的控制因素為穩(wěn)定應(yīng)力，而腹桿截面的控制因素為長細(xì)比，腹桿對結(jié)構(gòu)的剛度貢獻(xiàn)較大。驗(yàn)算了結(jié)構(gòu)跨中與懸挑端的最大撓度，計(jì)算結(jié)果均滿足規(guī)范要求。以1～10階屈曲模態(tài)作為結(jié)構(gòu)初始幾何缺陷分布形式，計(jì)算了結(jié)構(gòu)各分區(qū)的極限承載力。計(jì)算結(jié)果表明，網(wǎng)殼結(jié)構(gòu)的最低階屈曲模態(tài)不一定為最不利初始幾何缺陷模態(tài)，應(yīng)以多階屈曲模態(tài)作為結(jié)構(gòu)初始幾何缺陷分布狀態(tài)計(jì)算承載力，以最小值作為結(jié)構(gòu)的極限承載力。
［關(guān)鍵詞］天津?yàn)I海國際機(jī)場； 航站樓； 鋼屋蓋； 網(wǎng)殼； 應(yīng)力比； 極限承載力
中圖分類號(hào)：TU393.3文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)23-0039-05
Design for T2 terminal building steel roof of Tianjin Binhai International Airport
Qi Lin1, Zhang Wenbo1, Sun Ronglai1, Hu Xueying2, Huang Xin1
(1 Airport College, Civil Aviation University of China, Tianjin 300300, China; 2 Tianjin Architecture Design Institute, Tianjin 300074, China)
Abstract:The general situation, structural characteristics and the design parameters of T2 terminal building steel roof of Tianjin Binhai International Airport were introduced. The natural vibration periods of the structure and the maximum stress ratios of the members were calculated. The calculation results indicate that the materials are used most profitably on the base of the satisfaction of the controlling stress ratio in the structural design. The control factor of the upper and lower chord sections of the structure is the stable stress, while the control factor of the web section is the slenderness ratio, and the web contributes a lot to the rigidity of the structure. The maximum deflection of the mid span and the cantilevered end of the structure was checked, and the results met the requirements of the code. The ultimate bearing capacity of each section of the structure was calculated by taking the first to tenth order buckling modes as the initial geometric defect distribution. The results show that the lowest order buckling mode is not necessarily the most disadvantageous initial geometric imperfection mode, and the multiple buckling mode should be taken as the initial geometric imperfection distribution state to calculate the bearing capacity, and the minimum value should be taken as the ultimate bearing capacity of the structure.
Keywords:Tianjin Binhai International Airport; terminal building; steel roof; lattice shell; stress ratio; ultimate bearing capacity
*天津市教委科研計(jì)劃項(xiàng)目（2018KJ244）。
作者簡介：齊麟，博士，副教授，Email: qilin1208@163.com。
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