Seismic Performance Analysis Of A Horizontal Irregular Shear Structure Of High Building

With the high-rise building in the pursuit of China’s rapid development, building type and functional diversity, there are a lot of plane irregular building. For the irregular structure of the plane, due to the irregular distribution of mass and stiffness of structural floors, causing the floors of the center of mass and stiffness centers do not coincide, so that the inertial force on each floor of the structure by earthquake and floors of resistance are not collinear performance, the structure will be in varying degrees for the translation and reverse the curse associated deformation characteristics.This paper studies the structural flexibility of irregular high-rise shear wall structure of a plane earthquake response analysis of the performance of the structure in the calculation of the elastic stage can meet the requirements of the existing norms and the comparative analysis PKPM, MIDAS two the subsection software to calculate the difference between the results and the completion of the design of the structure of the elastic stage. Using MIDAS software, select two different lateral force distribution pattern of irregular plane structure Pushover (Pushover) analysis show that the for irregular plane’s structure, to select the appropriate lateral force distribution pattern for Pushover analysis crucial. Capacity spectrum method to find the performance point of the structure of the elastic-plastic stage, show that the structure to be able to meet the goals of the earthquake is not earthquake-proof down. The structure of the development in the the elastoplastic phase of the plastic hinge, a hinge order to meet the strong wall limb weak member. The final results of the analysis of the structure of some improvement measures. Finally, the structure of the dynamic elastoplastic time history analysis, to examine Pushover Analysis twist efficiency, as well as for the the flat irregular structure of the project whether consideration Pushover analysis of the flat irregular structure similar to the project applicability. The main conclusions are:(1) The use of a pushover procedures to analyze the plane irregular structure similar to the project, the choice of the lateral force distribution pattern have an important impact on the analysis results.(2) For the irregular structure of the plane, you can use the dynamic elastoplastic analysis considered the structure of torsion effect, contrast Pushover analysis results, analysis Pushover Analysis for the applicability of the irregular structure of the plane.(3) Select the appropriate level should be different lateral force loading mode pushover procedures applied to the irregular structure of the project results will have some differences plane irregular structure similar to the project Pushover Analysislateral force distribution pattern, the results obtained by the different levels of lateral force distribution pattern there may be a greater difference.(4) Power the elastoplastic analysis method as additional calculations reflect good structure deformation concentration found structural weaknesses in Pushover Analysis for similar the flat irregular structure of the project alone, but also difficult to correct and reasonable structure seismicperformance assessment, still need to choose the right dynamic elastoplastic analysis of seismic waves on the structure.