- 摘 要
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（中船第九設計研究院工程有限公司， 上海 200063）
［摘要］上海船廠2E2-4地塊項目為帶大懸挑3層中心支撐-鋼框架結構，最大懸挑尺寸39m，屬特別不規(guī)則多層結構。采用SAP000及MIDAS Gen分別進行彈性階段建模分析，驗證了模型的可靠性；通過豎向荷載傳力路徑分析，優(yōu)化了結構布置，確定了結構關鍵構件；針對樓板應力分析、溫度應力分析中發(fā)現(xiàn)的薄弱部位，采取了設置施工后澆帶、局部加強樓板配筋、控制鋼構件設計應力等有效措施；對結構進行了多遇地震、設防烈度地震、預估罕遇地震下的抗震性能分析。結果表明，結構能夠達到預定的抗震性能目標。
［關鍵詞］大懸挑； 中心支撐-鋼框架； 抗震性能化設計； 時程分析
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2018)15-0008-06
Structural design of a large-cantilevered and concentrically braced steel frame
Ni Jiangong, Cai Mao, Sun Bo, Liu Qiwen, Zhu Weihua, Zhang Lu
(China Shipbuilding NDRI Engineering Co., Ltd., Shanghai 200063, China)
Abstract:Project 2E2-4 plot of Shanghai shipyard is a 3-floor concentrically braced steel frame with maximum 39m cantilever, which is a special irregular multistory building. The elastic analysis was carried out by using SAP2000 and MIDAS Gen to ensure the modeling reliability. The load path analysis was conducted to help rational structural design and find out the key members. Some effective measures, including setting late poured band, local strengthening slab and controlling the design stress of steel members, were adopted to enhance the weak parts found by slab stress analysis and temperature stress analysis. Seismic behavior under frequent, fortification and estimated rare earthquakes was studied. The results show that the structure can meet the seismic performance objectives.
Keywords:large cantilever; concentrically\|braced steel frame; seismic performance based design; time history analysis
作者簡介：倪建公，博士，教授級高級工程師，一級注冊結構工程師，Email: zcjynjg1969@163.com。
