韩继云  郭晓民  屈  伟
    （中国建筑科学研究院 北京 100013）

[提要]  梁板无粘结预应力筋穿过框架柱截面较多时，对框架柱承载力是否有不利影响是设计人员担心的问题。结合北京京盛广场工程高层建筑柱子横截面削弱状况作了对比试验研究。试验结果表明，无粘结筋单束布置占柱截面面积不超过20%时，对框架柱极限承载力影响不大。
[关键词]  无粘结预应力砼 框架柱  极限承载力  极限压应变

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