刘畅，黄用军，何远明

（中建国际（深圳）设计顾问有限公司， 深圳 518098）

 

［摘要］带加强层的框架-核心筒结构在伸臂桁架的作用下可以形成更大的刚度，抵抗倾覆力矩。通过不同形式的伸臂桁架模型分析对比，研究伸臂桁架与核心筒之间的传力机理，对比了不同形式的伸臂桁架的工作效率。结果表明，K形、V形和人字形伸臂桁架的抗侧刚度效率较高。同时，K形桁架的弦杆轴力较小，而V形桁架所形成的核心筒剪力墙抗剪负担较小，传力相对合理有效。伸臂桁架的设置，对核心筒剪力墙、周边框架柱的受力产生很大影响，增加加强层核心筒的刚度可能造成受力更为集中的不利影响。还分析了设置伸臂桁架对结构受力和非受力位移角的影响。

［关键词］伸臂桁架； 加强层； 框架-核心筒； 受力位移角

中图分类号：TU323.4，TU398      文献标识码：A      文章编号：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

作者简介：刘畅，博士，高级工程师，Email：liu.chang2@ccdi.com.cn。

 

参考文献

［1］傅学怡.带刚性加强层RC高层建筑结构设计建议［J］. 建筑结构,1999,29(10):44-47.

［2］张正国,傅学怡,王建俊，等.带刚臂超高层结构工作性能研究［J］. 建筑结构学报,1996,17(4):2-9.

［3］黄愿,汪梦甫,宋兴禹. 带钢桁架水平加强层的高层混合结构抗震性能分析［J］.钢结构,2010,25(5):15-19.

［4］杨克家,梁兴文,李波.带加强层超高层结构受力性能研究及设计建议［J］.建筑结构,2008,38(2):111-115.

［5］何伟明,刘鹏,殷超，等.北京财富中心二期办公楼超高层结构体系设计研究［J］.建筑结构,2009,39(11):1-8.

［6］闫峰,周建龙,汪大绥，等.南京绿地紫峰大厦超高层混合结构设计［J］.建筑结构,2007,37(5):20-24.

［7］汪大绥,周建龙,袁兴方.上海环球金融中心结构设计［J］. 建筑结构,2007,37(5):8-12.

［8］魏琏,王森.论高层建筑结构层间位移角限值的控制［J］. 建筑结构,2006,36(1):22-28.