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    韓繼云  郭曉民  屈  偉
    （中國(guó)建筑科學(xué)研究院 北京 100013）

[提要]  梁板無粘結(jié)預(yù)應(yīng)力筋穿過框架柱截面較多時(shí)，對(duì)框架柱承載力是否有不利影響是設(shè)計(jì)人員擔(dān)心的問題。結(jié)合北京京盛廣場(chǎng)工程高層建筑柱子橫截面削弱狀況作了對(duì)比試驗(yàn)研究。試驗(yàn)結(jié)果表明，無粘結(jié)筋單束布置占柱截面面積不超過20%時(shí)，對(duì)框架柱極限承載力影響不大。
[關(guān)鍵詞]  無粘結(jié)預(yù)應(yīng)力砼 框架柱  極限承載力  極限壓應(yīng)變

Combining with the tall building of Beijing Jing-sheng Plazza engineering project, this paper presents a contrast experimental research on the weakened states of column section for frame, which shows that the influence of those unbonded reinforcement to the ultimate bearing capcity of column section for frame is not serious, when the total area of single unbonded prestressed tendons does not exceed 20%of the cross-sectional area of column section for frame.
Keywords: unbonded prestressed concrete; frame column; ultimate; bearing capacity; compressive strain