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(北京市建筑設(shè)計(jì)研究院有限公司， 北京 100045)

［摘要］探討了組合框架梁剛度放大系數(shù)計(jì)算方法，分析了組合框架梁剛度放大系數(shù)對(duì)整體結(jié)構(gòu)的影響。通過減小上翼緣尺寸改進(jìn)了組合次梁截面，并對(duì)組合次梁撓度及承載力的變化進(jìn)行研究。給出了組合框架梁與組合次梁統(tǒng)籌深化設(shè)計(jì)流程。改進(jìn)組合框架梁截面形式可以簡化剛度放大系數(shù)的計(jì)算方法，并且使剛度放大系數(shù)得到提高。組合框架梁的剛度放大系數(shù)與層間位移角和框架部分分配的地震剪力呈正相關(guān)。改進(jìn)組合次梁的撓度有所增大，承載力基本沒有變化。通過對(duì)組合框架梁和組合次梁進(jìn)行統(tǒng)籌設(shè)計(jì)，可以有效利用結(jié)構(gòu)高度，保證建筑凈高。

［關(guān)鍵詞］組合梁； 設(shè)計(jì)改進(jìn)； 剛度放大系數(shù)； 超高層

中圖分類號(hào)：TU398文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2017)07-0052-05

Research on design improvement of steel-concrete composite beam and its application in super high-rise structure

Ma Kai

(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The calculation method of rigidity amplification coefficient for composite frame beam was discussed, and the influence of rigidity amplification coefficient on the whole structure was analyzed. The section of composite secondary beam was improved by reducing the size of upper flange and the variation of deflection and bearing capacity was studied. The process of detailed design on both composite frame beam and composite secondary beam was given. The calculation method of rigidity amplification coefficient can be simplified and the rigidity amplification coefficient can be increased by the o,improvement of section form for composite frame beam. The rigidity amplification coefficient of composite frame beam is correlated with inter-story displacement angle and seismic shear force distributed by framework. The deflection increases after the improvement of composite secondary beam, but there is no change basically on bearing capacity. The structural height can be used effectively and the clear height can be ensured by optimized design on both composite frame beam and composite secondary beam.

Keywords:composite beam； design improvement； rigidity amplification coefficient； super high-rise structure

作者簡介：馬凱，碩士，工程師，Email：mk-14132008@163.com。