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（南京金宸建筑設(shè)計(jì)有限公司，南京 210019）
［摘要］對(duì)某鋼筋混凝土多層大懸挑結(jié)構(gòu)進(jìn)行受力分析和優(yōu)化設(shè)計(jì)，結(jié)合建筑造型，采用斜拉鋼管內(nèi)設(shè)預(yù)應(yīng)力筋吊拉多層鋼筋混凝土懸挑梁，一次施加預(yù)應(yīng)力，形成空間整體懸挑桁架，解決了鋼筋混凝土大懸挑梁的承載力和變形問題。同時(shí)對(duì)鋼管節(jié)點(diǎn)設(shè)計(jì)、張拉控制應(yīng)力、預(yù)應(yīng)力損失的控制、張拉過程及監(jiān)測(cè)過程提出了設(shè)計(jì)建議。
［關(guān)鍵詞］大懸挑結(jié)構(gòu)；斜拉鋼管；體內(nèi)預(yù)應(yīng)力；空間整體懸挑桁架
中圖分類號(hào)：TU378-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2012)03-0119-04
Application of internal prestress on tubes in large-span cantilevered structure
Sun Yaping, Li Han, Xu Congrong, Li Chunlei(Nanjing Kingdom Architecture Design Co., Ltd., Nanjing 210019, China)
Abstract:The stress analysis and optimum design of a multi-layered cantilevered reinforced concrete structure were introduced. Combined with the practical architectural models, multilayer reinforced concrete cantilevered beams suspended by incline-dragged steel tubes with prestressed steel bar inside, and the spatial integral cantilevered truss stretched to the final forming only once. This technology will help to solve the problems about increasing the bearing capacity and reducing the deformation for large-span reinforced concrete cantilevered beams. Meanwhile, some recommendations are provided about the design of the steel pipe nodes, the control of tension stress, the control of prestress lost, and the tension over the process and monitoring.
Keywords:large-span cantilevered structure;incline-draged steel tube;internal prestress;spatial intergral cantilevered truss
作者簡(jiǎn)介： 孫亞萍，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：syp641024@yahoo.com.cn。
參考文獻(xiàn)
［1］葛家琪, 王樹, 張國(guó)軍, 等. 東北師范大學(xué)體育館體內(nèi)預(yù)應(yīng)力大跨度鋼管桁架結(jié)構(gòu)設(shè)計(jì)研究［J］. 建筑結(jié)構(gòu),2009,39（10）：58-61.