摘要
在框架-核心筒结构体系中,加强层可显著提高结构抗侧刚度、减小结构侧移,但会带来结构刚度、内力突变等不利影响。以某超高层建筑为工程背景,研究了黏滞阻尼器在伸臂桁架体系中的应用及在多遇地震和罕遇地震作用下的减震效果,研究了设置黏滞阻尼器的环带桁架在超高层建筑中的较优位置和减震效率。结果表明:黏滞阻尼器在伸臂桁架结构中的设置可以减小核心筒剪力墙的塑性损伤,减小结构的动力响应;设置黏滞阻尼器的环带桁架宜布置在层间相对速度大的位置,随超高层结构高度增加,阻尼器的减震效率降低。通过对伸臂桁架与外框柱、核心筒连接节点的设计及构造的分析,提出了连接节点的设计建议。
In frame-core wall structural system, the outriggers and belt members can significantly improve the lateral structural stiffness and decrease the lateral deflection. However they will bring adverse effects such as abrupt change of structural stiffness and internal force. Based on one super high-rise building, the damping effect of viscous dampers in the outrigger was analyzed under frequent and rare earthquakes. The optimal position and efficiency of damper belt truss in super high-rise building were analyzed. The results show that viscous dampers in outrigger can reduce the plastic damage to the core wall and reduce the dynamic response of the structure. It is appropriate to place damper belt truss in the story where relative velocity is large. Efficiency of damper belt truss decreases with the increasing of structure height. The connections between the outrigger and the frame column as well as core tube were analyzed and suggestions are given on connection design.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2014年第3期8-15,共8页
Journal of Building Structures
