Application Of Outrigger Truss-Damper System In Wind And Shock Absorption Of Super High-Rise Buildings

In recent decades,with the rapid development of urbanization in China,super high-rise structures are often widely concerned as a landmark building of a city,because the height is generally more than 100 m,so there are strict requirements for structural safety and comfort.The super high-rise building adopts the form of frame-core tube combination,the height and width are relatively large,it belongs to a flexible structure,its overall anti-lateral shift rigidity is small,and it is easy to produce vibration under earthquake or strong wind load,which is easy to adversely affect structural safety and human comfort.By strengthening the rigidity of the structure to resist earthquake or wind loads,the size of structural beams and columns will increase,and the increased weight of the structure will require higher foundation treatment,resulting in a doubling of construction costs.The energy-dissipating and vibration damping system has certain advantages in the wind and vibration absorption of super high-rise structures,among which the liquid viscous damper energy consumption and vibration damping system has good vibration damping effect,low cost and convenient maintenance,and has gradually been widely used in the shock and wind resistance design of super high-rise structures in recent years.In this paper,by comparing the dynamic load response of the front and rear structures of the extension truss damper system,the optimization schemes I and II are proposed and the improvement analysis is proposed.Firstly,this paper introduces the research background,development status and world-famous damper energy consumption and vibration damping engineering of viscous damper system.The basic principle and various arrangement methods of liquid viscous damper are explained in detail,and the mechanism of the response of the boom truss damper system in wind and shock absorption is clarified.Secondly,this paper takes a super high-rise building in Xi’an with earthquake resistance as an example to calculate and analyze the structure of the truss-damper system.The time history response of the seismic load and wind load study structure of the structural model were respectively carried out to compare and analyze the difference in the dynamic response of the structure before and after setting the outrigger truss-damper system,and the feasibility of the good vibration damping performance and energy dissipation damping scheme of the outrigger truss-damper system was verified.Finally,based on the dynamic load response analysis of the front and rear structure of the extension truss-damper system,two optimization schemes with higher energy dissipation and vibration damping efficiency are proposed.The analysis results show that the wind and shock absorption effect of the optimized extension truss-damper scheme is not only better than the original scheme,but also the hysteresis curve of the damper is full,and the amplitude of the seismic response spectrum is significantly reduced,which is conducive to the protection of non-structural components and equipment,and is more conducive to improving the wind vibration comfort and safety of the structure.In this paper,by optimizing the design of energy consumption and vibration damping of super high-rise structures under dynamic load,this paper can provide a reference for the vibration damping method of the same type of extension truss-damper system in the future.