框架-分布摇摆芯筒-核心筒结构体系力学模型及耗能减震性能分析  

Mechanical model and energy dissipation performance analysis of frame-distributed rocking core tube-core tube structure system

作　　者：陈易飞 何浩祥[1] 兰炳稷 孙澔鼎 CHEN Yifei;HE Haoxiang;LAN Bingji;SUN Haoding(Beijing Municipal Key Lab of Engineering Anti-earthquake 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：《振动与冲击》2023年第5期47-56,91,共11页Journal of Vibration and Shock

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

摘　　要：为了提高传统框架-核心筒(frame core tube, FCT)结构的经济性,提出框架-分布芯筒-核心筒(frame-distributed tube-core tube, FDCT)新型高层结构体系,用以减小传统筒体围合面积。进而提出框架-分布摇摆芯筒-核心筒(frame-distributed rocking tube-core tube, FDRCT)新型高层结构体系,改善FDCT因刚度削弱导致的抗震能力下降。根据FCT结构、FDCT结构和FDRCT结构的简化分析模型,基于Lagrange方程建立三种结构的动力方程。通过分析地震下结构的时程响应,针对分布摇摆芯筒的质量进行相关参数分析,证明附加摇摆体系的FDRCT结构具备优良的耗能减震性能。对三种结构分别进行了不同场地条件以及不同类型长周期地震波下动力时程分析,结果表明FDRCT结构在不同类型地震波下均有耗能减震效果,且在长周期地震波下更为优越。对三种结构的性能-利润总值进行评估,结果表明在不同类型地震波下FDRCT结构均可实现既能提升结构的经济性,也能保证结构在地震下的安全性能。Here, to improve economy of traditional frame-core tube(FCT) structure, a new frame-distributed core tube-core tube(FDCT) high-rise structure system was proposed to reduce the enclosed area of traditional tube body. Furthermore, a new frame-distributed rocking core tube-core tube(FDRCT) high-rise structure system was proposed to improve the aseismic capacity of FDCT due to stiffness-weakening. According to simplified analysis models of FCT structure, FDCT structure and FDRCT structure, dynamic equations of the 3 structures were established based on Lagrange equation. Through analyzing time history responses of the 3 structures under earthquake and relevant parametric analyses for mass of distributed rocking core tube, it was shown that FDRCT structure with additional rocking system has excellent energy dissipation and shock absorption performance. Dynamic time history analyses of the 3 structures under different site conditions and different types long-period seismic waves were performed, respectively. The results showed that FDRCT structure has energy dissipation and shock absorption effects under action of different types seismic waves, and it is more superior under long-period seismic waves;performance-profit total values of the 3 structures are evaluated, data reveal FDRCT structure can not only improve the economy of structure under action of different types seismic waves, but also guarantee the safety of structure under earthquake. In order to improve the economy of traditional frame core tube(FCT) structural system, a new high-rise structural system of frame-distributed tube-core tube(FDCT) is proposed to reduce the enclosed area of traditional tube. Furthermore, the frame-distributed rocking tube-core tube(FDRCT) high-rise structural system is proposed to improve the reduced seismic capacity of FDCT due to the weakened stiffness. According to the simplified mechanical models of FCT, FDCT and FDRCT, the three structural dynamic equations are established based on Lagrange Equation. By analyzing the time his

关 键 词：框架-核心筒结构 分布摇摆芯筒 层间位移角 耗能减震 性能-利润总值 

分 类 号：TU311.1[建筑科学—结构工程]