Optimization analysis on a super high-rise tower in low intensity area
Due to the large volume of a single tower,the structural economic indicators of super high-rise buildings have attracted much attention.Finding the most reasonable structure system is the theme of continuous self iteration and updating of super high-rise buildings.The control direction of tower buildings in high intensity and low intensity areas is completely different.The optimization process was introduced to find the optimal structure of super high-rise buildings in low intensity areas.Taking a super high-rise tower with a building height of 250m located in a low intensity 6 degree zone as an example,the control indicators determined based on the preliminary tower plan are the stiffness to weight ratio and shear to weight ratio.The iterative optimization of additional mass and self-weight was carried out with the control indicators as the goal.Next is to improve the structural stiffness.The size of the core tube is determined based on vertical traffic and equipment pipe wells,and under the allowable conditions of the building,better contribution to the stiffness of the frame is achieved through different arrangements of columns.The weight contribution of pure concrete columns is greater than the stiffness contribution,and a more reasonable laminated column section form was selected by comparing laminated columns and steel columns.In the case of low seismic intensity zone where the vertical load of low structure meets the basic demand but the horizontal stiffness does not meet the code requirement,the overall stiffness is improved by adding the extension arm truss.The most effective extension arm truss form was selected by analyzing different extension arm forms.The most efficient structure was selected by reducing redundant weight and effectively improving structural stiffness,with high architectural quality and reasonable cost.
super high-rise buildingrigidity to weight ratioiterative optimizationstacked columnextension arm truss
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