新型框架-阻尼框筒结构体系在地铁上盖开发中的应用研究
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中图分类号：TU973.2 文献标志码：A DOI： 10.15935/j.cnki.jggcs.202504.0009
AbstractThe frame-damping-framed-tube structure is anew structural system in whichthe“damping-framedtube”is used to approximate the core tube，with the frame bearing allvertical loads.This paper investigates the feasibility of applying this new structural system in the development of upper cover of urbanrail transit. Elastic analysis under frequently occurred earthquake and elastoplastic time history analysisunder rarely occurred earthquake were carred out.Analysis results show that the elastic and elastoplastic inter-story drift of the well-designed upper cover frame-damping-framed-tube structure of urban rail transit can meet the requirements of design standards. Under rarely occurrd earthquake，the damping walls yield adequately and dissipate energy，with an additional damping ratio of whole structure up to 1.82% and that of upper cover structure up to 3.45% ，showing excellent energy dissipation and seismic mitigation effects.Compared with conventional frame-core tube structures，the elimination of the core tube reduces the dead load of the upper cover structure，improves the load distribution inthe transfer level，and benefits the designof the structure below the platform.It indicated that the new structure is suitable for the development of upper cover of urban rail transit.This paper also discusses the influence of the structure below the platform on the performance of frame-damping-framed-tube structure.Compared to being embedded on the ground，the seismic response of high floors of the upper cover frame-damping-framed-tube structure is amplified due to the whipping effect. Therefore，it is necessary to appropriately increase the stifness and bearing capacity of the damping walls on the high floors to fully utilize their energy dissipation capacity.
Keywordsframe-damping-framed-tube structure，upper cover of urban rail transit，steel plate damping wall，seismic performance
0 引言
框架-阻尼框筒结构是在传统的框架-核心筒结构的基础上，采用"框架-钢板阻尼墙"来近似代替核心筒，由框架承担全部竖向荷载，钢板阻尼墙提供附加刚度和附加阻尼所形成的一种新型减震结构体系，如图1所示。（剩余11345字）
