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(啟迪設(shè)計(jì)集團(tuán)股份有限公司, 蘇州 215021)

摘要: 本工程屋頂層?xùn)|側(cè)整層挑出,懸挑長(zhǎng)度 16. 80m,并在懸挑端南北向封閉形成 U 形懸空辦公空間. 懸挑結(jié)構(gòu)采用鋼桁架方案,并通過(guò)多方案比選確定滿(mǎn)足建筑要求、結(jié)構(gòu)安全及經(jīng)濟(jì)合理的桁架形式. 詳細(xì)介紹了懸挑結(jié)構(gòu)承載力、變形、抗連續(xù)倒塌、樓蓋舒適度、樓板應(yīng)力及復(fù)雜節(jié)點(diǎn)等專(zhuān)項(xiàng)分析. 結(jié)果表明:懸挑桁架向主體結(jié)構(gòu)內(nèi)部延伸一跨、支撐桁架的框架柱內(nèi)設(shè)置型鋼、懸挑桁架做成剛接節(jié)點(diǎn)等措施可有效保證結(jié)構(gòu)承載力、變形及抗倒塌能力,通過(guò)調(diào)整樓板厚度和配筋及控制合理的施工順序可以有效減小桁架變形造成的樓板拉壓內(nèi)力.

關(guān)鍵詞: U 形懸挑結(jié)構(gòu); 鋼桁架; 豎向地震; 抗連續(xù)倒塌; 舒適度; 樓板應(yīng)力

中圖分類(lèi)號(hào):TU355 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002?848X(2022)07?0051?09

DOI:10. 19701 / j.jzjg.SZY2132

Design and analysis of a U?shaped cantilever structure

CAO Yankai, YUAN Xuefen, GUO Jun, LIN Shan

(Tus?Design Group Co., Ltd., Suzhou 215021,China)

Abstract: The entire east side of the roof layer of this project is protruded out, the cantilever length is 16. 80m, and thecantilever end is closed in the north?south direction to form a U?shaped suspended office space. The cantilever structureadopts the steel truss scheme, and through the comparison of multiple schemes, the truss form that meets the architecturalrequirements, structural safety and economical rationality was determined. The special analysis of the bearing capacity,deformation, collapse prevention, floor comfort, floor stress and complex joints of the cantilevered structure was introducedin detail. The results show that measures such as extending the cantilever truss to the interior of the main structure for onespan, setting the section steel in the frame column supporting the truss, and making the cantilever truss into rigid joints,can effectively ensure the bearing capacity, deformation and anti?collapse ability of the structure. By adjusting the thicknessand reinforcement of the floor and controlling the reasonable construction sequence can effectively reduce the tensile andcompressive internal force of the floor caused by the deformation of the truss.

Keywords:U?shaped cantilever structure; steel truss; vertical earthquake; anti?continuous collapse; comfort; floor stress

第一作者:曹彥凱,學(xué)士,高級(jí)工程師,一級(jí)注冊(cè)結(jié)構(gòu)工程師,主要從事大型綜合體、大跨結(jié)構(gòu)、復(fù)雜高層等結(jié)構(gòu)設(shè)計(jì)研究,Email: yankai.cao@ siad?c.com.

[引用本文] 曹彥凱,袁雪芬,郭軍,等. 某 U 形懸挑結(jié)構(gòu)設(shè)計(jì)與分析[ J]. 建筑結(jié)構(gòu),2022,52(7):51?59. CAOYankai,YUAN Xuefen,GUO Jun,et al. Design and analysis of a U?shaped cantilever structure[ J]. Building Structure,2022,52(7):51?59.