Study On The Seismic Performance Of Suspended Spherical Grid Structur

With the continuous improvement of the requirements for buildings,China is moving towards a multiple development era of combining architecture and art,beautiful appearance,diversified functions,and safety and reliability.The suspension structure is suspended in the air through floors,making full use of the strength of steel,significantly reducing the amount of material used,reducing the dead weight of the structure,facilitating architectural modeling,adapting to various architectural planes,and creating a space with good physical properties.In addition,it can flexibly meet the requirements of various architectural functions and artistic processing.However,it should be emphasized that the stability of the suspension structure is relatively poor,so the edge structure and bottom support need to have a certain degree of stiffness and reasonable form to be able to bear the strong tensile force at the end.Especially under earthquake action,its structural stability is even worse.Therefore,vibration reduction and isolation techniques are commonly used to reduce the response of structures and improve their stability.With the development of the construction industry,the perfect combination of architecture and art will become the mainstream direction of future design.In design,optimizing the use of structures,materials,and technologies,enhancing safety,and reducing negative impacts on the environment will be an inevitable trend in the development of architecture.This paper takes a cultural center technological arena with suspended spheres as an example.In the fifth and sixth floors,the central suspended sphere structure is used,with rigid suspension rods hanging on the top suspension beam.A composite lead viscoelastic damper is added to the entrance of the technological arena to control the deformation of the sphere and reduce the relative displacement at the connection.A suspension sphere mesh structure system model was established and analyzed using SAP2000 software under earthquake loads with and without the composite lead viscoelastic damper.The structure was analyzed for bi-directional and tri-directional earthquake effects using elastic-plastic analysis,vulnerability analysis via incremental dynamic analysis,and anti-progressive collapse analysis via a component removal method.According to the analysis,the following conclusions were drawn: after elastic-plastic and vulnerability analyses,setting eight composite lead viscoelastic dampers at the entrance of the cultural center technological arena sphere can effectively reduce the earthquake response of the sphere,making it more resistant to earthquakes,and more conducive to achieving the design goal of "not collapsing in a major earthquake."...