框架-分布摇摆芯筒-核心筒结构体系减震机理分析及应用  

Damping mechanism analysis and application of frame‑distributed rocking tube-core tube structure system

作　　者：陈易飞 何浩祥[1] 王宝顺 程时涛 CHEN Yi-fei;HE Hao-xiang;WANG Bao-shun;CHENG Shi-tao(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《振动工程学报》2023年第2期357-368,共12页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(51878017);国家重点研发计划资助项目(2017YFC1500604)。

摘　　要：传统的框架-核心筒(FCT)结构体系在保证抗震性能的情况下存在布局不灵活和经济性不足等局限。提出框架-分布芯筒-核心筒(FDCT)高层结构体系,其具有三道抗震防线。为了协调控制层间位移,将其进一步改进为框架-分布摇摆芯筒-核心筒(FDRCT)高层结构体系。建立FDCT结构和FDRCT结构的简化动力模型,并进行频域动力分析和地震动随机分析,探究影响减震效果的主要参数,证明FDRCT结构相比于FCT结构具有更好的减震效果。对典型的FCT结构进行设计调整,建立相应的FDCT结构和FDRCT结构,并进行弹塑性时程分析。结果表明:相对于传统方案,由于FDCT结构刚度较小,地震作用下其位移将适当变大;虽然FDRCT结构的最大层间位移角和顶部位移会略有增大,但层间变形分布更加均匀,限制了薄弱层的出现,且结构加速度响应有所下降。适当增大分布摇摆芯筒的质量可使结构变形更加均匀。分析表明:FDRCT结构既可以提高结构的经济性又具备良好的抗震减震性能,具有良好的工程应用价值。The traditional frame-core tube(FCT)system has limitations such as inflexible layout and insufficient economy while ensuring seismic performance.A new high-rise structure system of frame-distributed tube-core tube(FDCT)is proposed,which has three seismic fortification lines.In order to coordinate and control story drift,it is further improved into a new type of high-rise structure system,namely frame-distributed rocking tube-core tube(FDRCT).The dynamic models of FDCT and FDRCT are es⁃tablished,and the main parameters that affect them damping effect are explored via the frequency domain dynamic and ground mo⁃tion random analysis,which is proved that FDRCT structure has better damping effect than FCT structure.The typical FCT struc⁃ture is designed and adjusted to establish the corresponding FDCT structure and FDRCT structure,and the nonlinear time history analysis is carried out.Compared with the traditional scheme,the displacement of FDCT is increased appropriately due to its small stiffness.Although the maximum story drift ratio and top displacement of FDRCT structure increase slightly,the distribution of story deformation is more uniform,which prevents the appearance of weak stories,and the structural acceleration response decreas⁃es.Appropriately increasing the mass of the distributed rocking core can make the structural deformation more uniform.The eco⁃nomic analysis results show that FDRCT structure can not only improve the economy,but also has better seismic and damping per⁃formance,which has excellent engineering application value.

关 键 词：框架-核心筒结构 分布芯筒 分布摇摆芯筒 变形控制 减震 经济性 

分 类 号：TU352.1[建筑科学—结构工程] TU318