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(武漢市建筑設(shè)計(jì)院，武漢 430010)

［摘要］湖北省圖書館新館為框架結(jié)構(gòu)，局部設(shè)置少量支撐及剪力墻，屬于平面、豎向均不規(guī)則的結(jié)構(gòu)。結(jié)合概念設(shè)計(jì)和計(jì)算分析，對(duì)新館工程上托7層懸挑轉(zhuǎn)換桁架的結(jié)構(gòu)布置進(jìn)行了設(shè)計(jì)方案比選；分析比較了不同樓板假定對(duì)桁架弦桿的受力和配筋影響。結(jié)果表明：傳力越直接，結(jié)構(gòu)布置越合理；對(duì)于平面不規(guī)則或考慮溫度荷載工況的結(jié)構(gòu)，剛性樓板假定會(huì)產(chǎn)生較大誤差。桁架節(jié)點(diǎn)復(fù)雜，設(shè)計(jì)中提出了有別于常規(guī)做法的適用節(jié)點(diǎn)構(gòu)造。

［關(guān)鍵詞］懸挑桁架；轉(zhuǎn)換桁架；支撐；樓板假定；節(jié)點(diǎn)

中圖分類號(hào)：TU323.4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)06-0130-04

Structural design on transfer cantilever truss of New Hubei Province Library

Qiu Jian, Wu Jun, Wen Siqing, Nie Qiling(Wuhan Architectural Design Institute,  Wuhan 430010,  China)

Abstract:The New Hubei Province Library mansion is a frame structure with a few braces and shear walls. It is an irregular structure both on plane and vertical direction. Combined with conceptual design and calculation analysis, a better structural scheme of the transfer cantilever truss which supports the upper seven floors has been chosen.  The influence of different floor hypotheses on the stress of truss chords and the reinforcing bars was compared. The results indicate that the structure is more reasonable when the force transmission is more direct. The structure with anomalous plane or calculating temperature load will bring large error when the rigid-floor hypothesis is adopted. The joint of the truss is complex, and some suitable practices which are different from traditional construction have been proposed.

Keywords:cantilever truss；transfer truss；brace；floor hypotheses；truss joints

通訊作者：吳軍，碩士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:21244113@qq.com。參考文獻(xiàn)

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