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任家驥 （江蘇省建筑設(shè)計研究院 南京 210029）
[提要] 拱北口岸聯(lián)檢樓是迎澳門回歸的重點工程項目之一。作者介紹了該工程大面積、大柱網(wǎng)、雙向無粘結(jié)連續(xù)多跨預(yù)應(yīng)力混凝土框架的結(jié)構(gòu)設(shè)計。通過結(jié)構(gòu)模擬試驗和工程實測驗證了理論分析的準(zhǔn)確性。研究了多排柱剛度對框架梁預(yù)應(yīng)力建立的影響、雙向局部承壓錨固節(jié)點構(gòu)造。提出了以施加預(yù)應(yīng)力為主的“以抗為主，抗放結(jié)合”原則達到建筑不設(shè)伸縮縫的具體設(shè)計要求。
[關(guān)鍵詞] 口岸 聯(lián)檢樓 雙向 無粘結(jié)預(yù)應(yīng)力 模擬 不設(shè)伸縮縫Gongbei Port joint-inspection building is one of the major projects to welcome the returning of Macao. Author introduces the structure design of this project, which is characterized with large area, large column bays, multi-span con'tinuing frames with two-way unbonded prestressed concrete. Theoretical analysis is proved valid through model experiments and in-site measurements. The influence of multi-row-columns' stiffeness to produce the prestressing force in frame girders are discussed, as well as the anchoring construction considering two-way local compression at the joints. To avoiding structure joints, which can expand or contract according to the change of temperature, prestressing method is applied in principle of"resisting combined with avoiding".
Keywords: two-way; unbonded prestressed; structure joints; port joint-inspection building
