Super High-rise Structure Selection And Feasibility Stud

The development of the city is accompanied by the concentration of population,and the shortage of land resources limits the carrying capacity of urban space.The emergence of high-rise and super high-rise buildings alleviates this contradiction and plays an indispensable role in modern cities.However,the investment of super high-rise buildings is huge,and the consumption of resources is difficult to estimate.Therefore,in the construction of new super high-rise buildings,the selection of structures is particularly important,which directly determines whether the building is economical.On the premise of meeting various functional requirements,reasonable building structure schemes can often achieve better benefits.At present,the selection of super high-rise structures mainly starts from improving the lateral force resistance efficiency of the structure and reducing the horizontal load on the structure.This paper first analyses the factors influencing the selection of super high-rise structures with three aspects: different structural types,different structural arrangements and economics respectively;And then,based on a 232 m super high-rise building project,this paper first determines the lateral force resistance system adopted by the structure in combination with the building scheme,and considers the influence of various factors to further select and optimize the lateral force resistance efficiency of the structure.Secondly,the final structural scheme is selected by analyzing the economy of the structural part through the quota.Finally,the elastic analysis of the structure under frequent earthquakes is carried out.The main contents are as follows:Ten analysis models were established and divided into five groups to consider the effects of core tube size,building materials,column spacing,outer frame beam height and reinforcement layer arrangement on structural performance.The analysis results show that the size of the core tube has a great influence on the stiffness of the structure.The larger the size of the core tube,the better the stiffness.When the circular concrete-filled steel tubular column and the square steel reinforced concrete column with the same steel ratio are used,the performance of the structure is not much different,but the circular concrete-filled steel tubular column can reduce the column diameter and increase the building space;reducing the column spacing and increasing the height of the outer frame beam can better improve the performance of the structure;the setting of the strengthened layer can effectively reduce the lateral displacement of the floor,and the performance improvement of the two strengthened layers is not obvious compared with the one.According to the budget quota,the project cost of different structural schemes is calculated,and the final structural scheme of the project is determined by comparing the three aspects of building materials,structural layout and structural lateral resistance efficiency.The comparison results show that the circular concrete filled steel tubular column has excellent mechanical properties,which can reduce the cost of structural materials to a certain extent.Under the requirements of structural performance,reducing the column spacing and increasing the core tube area increase the total cost of structural materials,but the improvement of structural performance is not obvious.Setting the strengthening layer can significantly improve the lateral resistance of the structure.Two different software YJK and SAP2000 were used to calculate and analyze the structure of the optimized final scheme,and the internal force and deformation of the structure under load were studied.The elastic time history analysis method was used to supplement the calculation,and the calculation results of the two analysis methods were compared.The results show that the structural indexes obtained by different software analysis are basically consistent,and the indexes of the optimized scheme meet the requirements of the specification.The structural performance is good and has certain economy.