Research On The Design Scheme Of Key Components Of Super High-rise Mega-frame Core Tube Structural System

With the continuous and high-speed development of urbanization process and people pay more attention to the efficient use of valuable urban land resources,high-rise and super highrise buildings have been spread all over the first and second tier cities in China,and the super high-rise(more than 500m)buildings have also emerged and become new "landmarks" in various places.In super high-rise buildings,the mega frame core tube structural system is more commonly used.Moreover,the mega frame core tube structure system is conducive to make full use of the building plane,improve the indoor space and landscape visual field effect,and promote the application of ordinary high-rise buildings has broad prospects.The key components of mega frame core tube structure system include mega frame columns,diagonal braces,outriggers,peripheral belt trusses,and core tubes.The reasonable design of these key components is the cornerstone for the system to achieve good structural performance.At present,the design theory of mega frame core tube structure system is developing,and its basic application research is less,the majority of engineering designers are still unfamiliar with this system,and there are some obstacles in the promotion and application.In this paper,Shenyang Baoneng global financial center super high-rise office building project as a research case,under the guidance of the structural concept design,the design plan of key components of the mega frame core tube structure system are systematically and deeply studied.By changing the main parameters of the key components,establishing different structural calculation models,focusing on the analysis and comparison of the calculation results of lateral deformation under frequent earthquake and wind load,exploring the basic structural layout and mechanical action law of key components.At the same time,combined with other important engineering factors that must be considered in the actual project,taking the overall benefit of the project as the optimization goal.A complete set of key components design plan selection method of mega frame core tube structure system is formed.Through the research of this paper,some engineering design suggestions of super high-rise mega frame core tube structure system are obtained.Hoping to provide some technical reference and inspiration for similar projects in the future.