Study On The Influence Of The Strengthening Layer Arrangement On The Seismic Performance Of The Frame Core Tube Structure

With the rapid development of the domestic economy,the structure of high-rise and super high rise building has been built at a fast speed in recent years.There have been several large earthquake disasters in the world since 21 st century.How to effectively improve the seismic performance of structures has always been a persistent problem in the engineering field.In all kinds of plans for improving the seismic performance of super high-rise buildings,strengthening layer in the structure is a very effective way to improve the seismic performance of the frame core tube super high-rise structure.Although the setting of strengthened stories has increased the overall rigidity of the building structure and reduced the deformation of the structure under the action of earthquake,at the same time,because of the stiffness mutation and stress concentration caused by its setting,it has also increased the damage to the structure under earthquake action in some aspects.At the same time,the different reinforcement layer number,the location of reinforcement layer and the different form of reinforcement layer have a great impact on the overall seismic performance of the structure.Therefore,it is very important to explore the optimum setting of the reinforced layer in the structure of the building under the aim of improving the seismic performance of the building.In this paper,a current frame core tube structure in Taiyuan--a comprehensive office building project as an example,using finite element analysis software Midas Gen,through modeling of engineering examples in software engineering and reduction,and the actual dynamic testing results verify the accuracy of project model by using the comparative data.Through the study on strengthening layer with different number and different locations and different layout effect on structural seismic performance,establish different contrast enhancement model layer scheme,using the software of dynamic elastoplastic analysis and pushover analysis,the comparative analysis of the data structure model of reinforced layer set the scheme,analysis of different layout scheme of reinforced structure layer under earthquake plastic deformation and internal force distribution,and the structure of weak layer distribution and the position of plastic hinge of the law.By contrasting different reinforcement layer setting schemes,the influence of different strengthening stories on the seismic performance of frame core tube structures is studied in detail.Based on the discussion of the optimal setting scheme of the strengthened layer in a comprehensive project office in Taiyuan,this paper gets the reference and practical research conclusions of similar engineering problems.