伸臂结构减震性能提升研究进展

Research Progress on Seismic Mitigation Performance Improvement of Outrigger Structure

框架-核心筒结构作为高层及超高层建筑结构的主要形式,其抗震需求随着建筑结构高度的增加而提高。在提升框架-核心筒结构的抗震需求方面,伸臂结构及消能伸臂结构具有显著的优势。设置传统伸臂可减少结构侧移,提高结构抗震性能;消能伸臂通过安装在核心筒和外框柱之间的黏滞阻尼器有效耗散结构振动能量,实现伸臂体系减震性能的提升;新型消能伸臂体系通过引入惯容或负刚度元件可进一步提高黏滞阻尼器耗能能力,实现体系减震性能的大幅提升,进而保证结构和居民生命财产安全。

Frame-core tube structure as the main form of high-rise and super high-rise buildings, its seismic de-mand increases with the height of the structure. In terms of promoting seismic demand of frame-core tube structures,the outrigger structure and damped outrigger structure have obvious advantages. Setting the traditional outrigger canreduce the structural lateral displacement and improve the seismic performance of the structure. The damped outrig-ger can dissipate vibration energy by installing viscous dampers between the core tube and the perimeter column, soas to reform effectively the seismic performance. Introducing the inerter or negative stiffness element can further im-prove the energy dissipation capacity of the viscous damper, realize the significant improvement of seismic mitigationof the outrigger system, and ensure the safety of the structure and the life and property of residents.