- 摘 要
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簡 斌 吳春華 （重慶大學(xué)土木工程學(xué)院 重慶 400045）
[提要] 在研究多層預(yù)應(yīng)力混凝土框架側(cè)向約束對梁軸壓力的影響規(guī)律時(shí)，重點(diǎn)考慮了施工方法、跨數(shù)和梁柱線剛度比等對預(yù)應(yīng)力框架梁軸壓力的影響。采用通用有限元法分析結(jié)果表明，當(dāng)采用“全部澆筑，一次張拉”的施工方法時(shí)，可只考慮第一層梁中的次軸力影響，對上部各層梁中的次軸力影響可忽略。當(dāng)采用“逐層澆筑，逐層張拉”的施工方法時(shí)，最大次軸力發(fā)生在頂層，其次為底層，其它各層次軸力可忽略。
[關(guān)鍵詞] 預(yù)應(yīng)力混凝土框架 側(cè)向約束 次軸力The influence of lateral restraints on axial force of beam in multi-story prestressed concrete frame is discussed and main factors including method of construction, span number and stiffness ratio of column to beam are considered. Finite element software is used in analysis and some results are reached. When prestressing bar is strentched after every story is constructed, the secondary axial force in the first floor should be considered only. When the prestressing bar is strentched after all storys are constructed, the largest secondary axial force occurs in the top floor and then in the first floor.
Keywords: prestressed concrete frame; lateral restraints; secondary axial force參 考 文 獻(xiàn)
1．張德峰，呂志濤．側(cè)向約束對預(yù)應(yīng)力混凝土框架壓力的影響．建筑結(jié)構(gòu)，2001，31(5)
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