Study On The Seismic Performances Of500Mpa Reinforced Concrete High-rise Multiple Tube-Frame Structure

Study on seismic performance and the expansion parameter comparative analysisof a12-storey high-rise (total height is42.15m) multiple tube—frame structure wardbuilding using SATWE structural analysis software. Analyse the impact on the seismicperformance by changing the parameters of the structure floors, the concrete strengthof the main force component,the shear wall thickness in order to provide theoreticalbasis for the high-rise multiple tube—frame structure design which makes the500Mpasteel bar as mainly forced steel bar.1. Describe the finite element analysis basic theory of high-rise multiple tube—frame structure, summarize research general situation survey of the finite elementanalysis; The SATWE structural analysis software simulated member bar such as Beam,Column and Bracing etc. using the space bar element, and simulated shear wall usingthe wall element which condensed on the basis of shell element. Build structureanalysis model with the floor is assumed that the whole plane of the structure hasinfinite stiffness.2. Study on seismic response of a12-storey high-rise (total height is42.15m)multiple tube—frame structure which makes the500Mpa steel bars as mainly forcedsteel bar, include mode analysis, the storey shear force, the storey displacement, floormoment analysis and elastic time history analysis under earthquake action, andresearch the seismic performance of the high-rise multiple tube—frame structure, andcome to the conclusion that the model system layout is symmetries, reasonable andfacade mass and stiffness is well-distributed; The whole performance of the structure iswell, and the high-rise multiple tube—frame structure which makes the500Mpa steelbar as mainly forced steel bar has good seismic capacity, The structure meets thespecifications related to the lateral limits in X and Y directions at serviceability limitstate and under frequent earthquake action, and there is no obvious weak layer.3. The finite element expansion parameter comparative analysis on this high-risemultiple tube—frame structureStudy on the expansion parameter comparative analysis based on the original 12-story high-rise multiple tube—frame structure finite element analysis; Analyse theimpact on the seismic performance by changing the parameters of the structure floors,the concrete strength of the main force component, the shear wall thickness and cometo the conclusion that the greatest impact on the overall structure is to increase thethickness of wall; the increasing in wall thickness makes the maximum displacementof the structure of the vertex lower by16.8%, the maximum story drift angle bedecreased by16.8%than the original structure; Improving the concrete strength canimprove the seismic performance of the structure to some extent, but not obviously.The maximum displacement, the maximum story drift, the bottom shear and thebottom bending of the building structure which reduces the concrete strength graderespectively increase by1.3%,1.7%,0.5%and0.8%in the main direction compared tothe original12-layer building structure on the average earthquake response; Themaximum displacement, the maximum story drift angle and the bottom bending of thebuilding structure which increases the concrete strength grade of the main forcecomponent respectively decrease by1.7%,1.9%and0.4%in the main directioncompared to the original12-layer building structure,and the magnitude of the changesis very limited.