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（中南建筑設(shè)計(jì)院股份有限公司， 武漢 430071）
［摘要］大懸挑屋蓋對豎向荷載、豎向地震及風(fēng)荷載反應(yīng)敏感，過大的撓度變形會影響結(jié)構(gòu)的正常使用。以蘄春三館為工程背景，從結(jié)構(gòu)的內(nèi)力分布和變形的角度出發(fā)，通過有限元軟件對其大懸挑屋蓋體系進(jìn)行了多種結(jié)構(gòu)方案的研究，并對模擬結(jié)果進(jìn)行了對比分析，與實(shí)測數(shù)據(jù)進(jìn)行相互驗(yàn)證。結(jié)果表明，多榀預(yù)應(yīng)力混凝土桁架通過調(diào)整桁架的預(yù)應(yīng)力，能很好地控制和改善懸挑過大可能造成的結(jié)構(gòu)受力和變形問題，其結(jié)構(gòu)方案和設(shè)計(jì)方法可供同類項(xiàng)目參考。
［關(guān)鍵詞］大懸挑混凝土結(jié)構(gòu)； 平面桁架； 變形； 預(yù)應(yīng)力
中圖分類號：TU473-2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2019)22-0076-04
Discussion and application on structural scheme selection of cantilevered roof for Qichun Three Museums
Zou Jie， Xiao Fei， Li Wei
(Centralsouth Architectural Design Institute Co.， Ltd.， Wuhan 430071， China)
Abstract:Due to the sensibility of the large cantilevered roof to the structural weight, vertical earthquake action and wind load, excessive deflection will affect the normal service of the structure. Taking Qichun Three Museums as engineering background, a variety of structural schemes for the large suspended roof system were studied by finite element software. Comparative analyses were made between the simulation results and measured data. Results demonstrate that multiple prestressed concrete truss by adjusting the prestressing force of truss can efficiently control and improve structural stress and deformation caused by oversized cantilevered structure, which could be referenced to by similar projects about structural scheme and design method.
Keywords:large cantilevered concrete structure; plane truss; deformation; prestress
作者簡介：鄒杰，碩士，工程師，Email:674816485@qq.com。
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