Floor Opening Are Antiseismic To Planeirregular Structures Performances Analysis

Nowadays,people's requirements on buildings are no longer limited to the use function,and the novelty of appearance and the innovation of art become the trend of architectural design.With the mature development of technology,more and more complex irregular buildings are realized.For high-rise buildings with floor openings,the problems of stress concentration,deformation complexity and stiffness mutation of stressed members become more obvious under the action of seismic force.Therefore,it is necessary to study the seismic damage of planar irregular buildings.And the frame shear wall structure combines the strength of frame structure and shear wall structure,has the flexibility of plane layout,can form a larger Shared space.In the time of resistance to seismic force,beam and column and other components can be effectively combined with shear wall,and have higher seismic capacity.It is widely used in high-rise buildings.For the frame shear wall structure,the irregularity of the structure and the partial opening of the floor will highlight the uneven stiffness of the structure.Under the earthquake action,the stress mechanism and failure process of the structure are more complicated.In this paper,a u-shaped irregular high-rise building is taken as an example,and eight sets of models are established through openings in different sizes and locations of different structures.Different models are compared and analyzed to explore the seismic impact of floor openings on buildings.Firstly,this paper selects SAP2000 finite element analysis software to establish the model of the simplified structure.Then,modal analysis and response spectrum analysis were carried out for each open-hole model under different load conditions,and the dynamic characteristics and deformation values of each model were obtained.Finally,artificial wave and natural wave are selected for seismic simulation.Compare the seismic effect of different hole openings.Through data comparison analysis found;The hole in the convex part of the plane will have a greater torsion effect on the structure,and the period of the hole is also significantly higher than that of other planar hole forms,which indicates that the hole pattern weakens the stiffness of the structure significantly.In the vertical position,the lower the opening position,the larger the period,the larger the deformation.It indicates that the hole in the height of the floor is less harmful to the structure.However,the structure is more uniform in stiffness and less stress concentration,which is more beneficial to the seismic resistance of the structure compared with other forms.In addition,the vertex displacement and displacement Angle of the structure are correspondingly reduced with the reduced hole opening rate.It can be seen that the opening size of structural floor slab should be limited.