（1 西安建筑科技大学土木工程学院， 西安 710055；2 柳州东方工程橡胶制品有限公司， 柳州 545005）

［摘要］超高层框架-核心筒结构通常设置伸臂桁架以提高结构刚度并满足层间位移角等规范控制指标。采用PERFORM-3D软件建立了带有普通伸臂的刚性方案模型和带有黏滞阻尼伸臂的阻尼方案模型，对比了两种方案在多遇、设防、罕遇地震作用下的层间位移角及结构受力情况，比较了罕遇地震作用下两种方案的残余变形及结构的损伤情况，最后结合构件的耗能对结构损伤进行量化分析。分析结果表明：阻尼方案改善了刚性方案结构刚度突变的问题，结构的抗侧刚度分布更为均匀，同时有效地降低了结构内力；与刚性方案相比，阻尼方案结构顶部残余变形显著减小，核心筒以及外框架的损伤情况得到改善。在地震作用下，黏滞阻尼伸臂充当结构第一道抗震防线，提高了结构的抗震韧性，有较好的应用前景。

［关键词］黏滞阻尼伸臂；伸臂桁架；超高层框架-核心筒结构；抗震性能

中图分类号：TU352-1,  TU355文献标识码：A文章编号：1002-848X(2021)03-0083-07

Study on the influence of viscous damped outrigger on the seismic performance of super high-rise frame-core tube structure

XUE Jianyang1, ZHANG Chongxin1, SUI Yan1,2, YANG Renmeng2, XIONG Gaobo2, LUO Zheng1

（1 School of Civil Engineering, Xi′an University of Architecture & Technology, Xi′an 710055, China;2 Liuzhou Orient Engineering Rubber Products Co., Ltd., Liuzhou 545005， China）

Abstract:The super high-rise frame-core tube structure is usually provided with outrigger truss to improve the structural rigidity and meet the specification control indexes such as the inter-story drift angle. One rigid scheme model with rigid outriggers and the other damping scheme model with viscous damped outriggers were established by PERFORM-3D software. The inter-story drift angle and structural internal force of the two schemes under the action of frequent, basic and rare earthquakes were compared. The residual deformation and structural damage of the two schemes under the action of rare earthquakes were compared. Finally, the structural damage was quantitatively analyzed based on the energy dissipation of the components. The analysis results show that the damping scheme eliminates the abruptness of structural stiffness in rigid scheme, it makes the lateral stiffness distribution more uniform and effectively  reduces the structural internal force. Compared with the rigid scheme, the residual deformation at the top of the damping scheme is significantly reduced, and the damage of the core tube and frame is minimized. The viscous damped outriggers act as the first seismic defense line of the structure under earthquakes, which improves the seismic resilience of structure and has a good application prospect.

Keywords:viscous damped outrigger;outrigger truss;super high-rise frame-core structure;seismic performance

*陕西省科技创新团队项目（2019TD-029），柳州欧维姆机械股份有限公司博士后科研工作站科研项目（201908）。