某高層建筑屋頂鋼結(jié)構(gòu)塔冠設(shè)計與思考
姚根圣
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（華東建筑設(shè)計研究總院， 上海 200002）
［摘要］介紹了某高層建筑屋頂鋼結(jié)構(gòu)塔冠的結(jié)構(gòu)體系、設(shè)計方法、設(shè)計結(jié)果，著重闡述了一階彈性分析方法和二階彈性分析方法計算結(jié)果，并對其進行了對比和探討，提出了二階彈性分析的必要性。將考慮與不考慮整體初始缺陷兩種情況下結(jié)構(gòu)的彈塑性承載力進行對比，結(jié)果表明，整體初始缺陷會加快一些構(gòu)件的塑性變形速率，從而在一定程度上影響結(jié)構(gòu)的整體彈塑性承載力。［關(guān)鍵詞］一階彈性分析方法; 二階彈性分析方法; 整體初始缺陷; 塑性變形速率; 彈塑性承載力中圖分類號：TU473.1 文獻標識碼：A 文章編號：1002-848X(2016)07-0040-04
Design and reflection on steel tower crown of a highrise buildingYao Gensheng(East China Architectural Design & Research Institute Co., Ltd., Shanghai 200002, China)Abstract: The structural system, design methods and design results of steel tower crown of a high-rise building were introduced. The results of first order elastic analysis method and second order elastic analysis method were emphasized, compared and discussed. The necessity of adoption of second order elastic analysis was proposed. The elasto-plastic capacity of the structure considering the global initial imperfection was compared with that of the structure not considering the global initial imperfection. Results show that global initial imperfection speeds up plastic deformation rate of some members, which impact global structural elasto-plastic capacity to certain extent.Keywords: first order elastic analysis method; second order elastic analysis method; global initial imperfection; plastic deformation rate; elasto-plastic capacity
作者簡介：姚根圣，碩士，工程師，Email: ygs997@163.com。
