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劉暢，黃用軍，何遠(yuǎn)明

（中建國際（深圳）設(shè)計(jì)顧問有限公司， 深圳 518098）

 

［摘要］帶加強(qiáng)層的框架-核心筒結(jié)構(gòu)在伸臂桁架的作用下可以形成更大的剛度，抵抗傾覆力矩。通過不同形式的伸臂桁架模型分析對比，研究伸臂桁架與核心筒之間的傳力機(jī)理，對比了不同形式的伸臂桁架的工作效率。結(jié)果表明，K形、V形和人字形伸臂桁架的抗側(cè)剛度效率較高。同時(shí)，K形桁架的弦桿軸力較小，而V形桁架所形成的核心筒剪力墻抗剪負(fù)擔(dān)較小，傳力相對合理有效。伸臂桁架的設(shè)置，對核心筒剪力墻、周邊框架柱的受力產(chǎn)生很大影響，增加加強(qiáng)層核心筒的剛度可能造成受力更為集中的不利影響。還分析了設(shè)置伸臂桁架對結(jié)構(gòu)受力和非受力位移角的影響。

［關(guān)鍵詞］伸臂桁架； 加強(qiáng)層； 框架-核心筒； 受力位移角

中圖分類號：TU323.4，TU398      文獻(xiàn)標(biāo)識碼：A      文章編號：1002-848X(2013)09-0057-05

 

Study and design suggestions on work performance of outrigger trusses

Liu Chang, Huang Yongjun, He Yuanming

（China Construction (Shenzhen) Design International, Shenzhen 518098, China）

 

Abstract: With the help of outrigger trusses, the frame-core tube structure with strengthened story can form larger stiffness to resist the overturning moment. Working efficiency and load transfer mechanism of different styles of outrigger trusses were studied. The results show that K-shaped, V-shaped and herringbone outrigger trusses are more efficient than others. The axial force in chords is smaller in K-shaped truss, and the shear force in the core tube shear walls produced by V-shaped truss is smaller. The force transmission is relatively reasonable and effective. The settings of outrigger trusses have a great impact on the forces of the core tube shear walls and frame columns. It might suffer more stress concentration on the condition that the core tube of the strengthened storey was reinforced to have-stiffness. The effect of outrigger trusses on physical inter-story displacement angle and un-physical inter-story displacement angle was analyzed.

Keywords: outrigger truss; strengthened story; frame-core tube; physical inter-story displacement angle

作者簡介：劉暢，博士，高級工程師，Email：liu.chang2@ccdi.com.cn。

 

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