Analysis Of The Influence Of Different Positions On The Seismic Performance Of Frame Structures

With the rapid development of economy and science and technology,in recent years,people are more and more favored for buildings with novel shapes and beautiful appearances.The staggered structure is more popular among people on the premise of satisfying the functions of building use.The staggered frame structure is a kind of vertical irregular structure,which has various unfavorable factors for the structure seismic resistance:at the staggered part,due to the different design heights,the vertical anti-side force members are likely to cause a sudden change in stiffness,for the frame structure It is easy to form long and short columns after the staggered layer,and the short column has poor ductility and is prone to brittle fracture,which is more unfavorable for the structure.The floor slabs with the wrong structure are misplaced,and it is easy to generate large internal force and deformation in the lateral layer.The wrong slab is equivalent to the large hole of the slab,weakening the overall strength of the slab,and relying on the slab to coordinate the whole structure.The ability to deform also decreases.Therefore,the design of the structure,the location of the staggered layer is also particularly important for the seismic resistance of the structure.The main research work carried out in this thesis is as follows:(1)、Three models were established based on the different seismic fortification intensity of the structure and the locations of the three kinds of local splits.Under the action of frequent earthquakes,the modal analysis,mode decomposition response spectrum analysis,and dynamic time history analysis of the structure are performed to obtain the natural vibration characteristics,interlayer shear force,and maximum interlayer displacement of the structure,respectively.By sorting the obtained values,the effects of the three local misalignment arrangements on the structure are obtained.(2)、According to the different positions of the local faults,the static elastoplastic analysis method is used to analyze the performance of the structure under different seismic intensities,the inter-layer displacements and the distribution of the plastic hinges.During the seismic analysis of the structure in the elastoplastic phase,the weakest part of the structure was found.