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      高立人
    （北京四維新建筑科技開(kāi)發(fā)中心 100081）

[提要]  本文介紹了美國(guó)佛羅里達(dá)州坦帕國(guó)際機(jī)場(chǎng)南停車(chē)樓的上下兩座預(yù)應(yīng)力混凝土V型懸臂梁結(jié)構(gòu)螺旋式雙車(chē)道的設(shè)計(jì)思想、結(jié)構(gòu)布置和后張預(yù)應(yīng)力實(shí)施方案。文中對(duì)開(kāi)裂截面柱在結(jié)構(gòu)整體分析中引起的剛度和內(nèi)力分配的變化，以及對(duì)該高位盤(pán)旋結(jié)構(gòu)所做的隨機(jī)振動(dòng)的沖擊分析都作了一定的論述。
[關(guān)鍵詞]  多層車(chē)庫(kù)  預(yù)應(yīng)力混凝土  螺旋 雙車(chē)道 懸臂梁 開(kāi)裂截面  隨機(jī)振動(dòng)

The design ideology, structural layout and post-tensioning scheme for the prestressed concrete V-type cantilever beams systemrs with 2-lane helices of Tampa international airport south garage are introduced in this paper. The effectiveness based on cracked section of columns in integral structural analysis and the impact analysis for vibration of the long cantilevers are also discussed.
Keywords: car building; screws carriage way; V-type cantilever beam; column; cracked section; prestressed concrete; structural design