带减震装置的巨型斜撑框架-核心筒超高层结构模型振动台试验研究

Shaking table test study on a mega braced frame-core wall super-high rise building with seismic reduction device

对8度区设置了屈曲约束支撑和黏滞阻尼器等减震措施的巨型斜撑框架-核心筒超高层结构进行了1∶35的整体缩尺模型振动台试验,首次将黏滞阻尼器应用于400m以上超高层结构整体模型振动台试验中。介绍了模型设计、试验过程及主要现象,测试了结构在8度小震、8度中震、8度大震地震波输入下的动力响应,包括结构自振特性、动力放大系数、楼层位移、层间位移角、损伤发展及阻尼器耗能。结果表明结构设计合理,减震措施有效,能满足规范及抗震设计性能目标的要求。在试验研究基础上,对结构设计提出了改进建议。

Shaking table test on 1∶ 35 model of a mega braced frame-core wall structure with buckling restrained braces( BRB) and viscous damper was carried out. It is the first time that the viscous damper has been applied to the shaking table test of the integral model of a super high-rise structure over 400 meters. The design of the model,program of the test and main results were introduced. The earthquake responses of the model was tested under various seismic actions from 8degree frequent earthquake to 8 degree rare earthquake,including the vibration characteristics,dynamic magnification factor,story displacement,story drift,damage evolution and energy dissipation of the dampers. The results show that the structure is reasonably designed and the seismic reduction measures adopted are effective. The structure can satisfy the requirements of codes and achieve the target of performance-based seismic design. Based on the shaking table test,some improvement suggestions about the structure design were proposed.