Research On Constraint Relations In Section Optimization Of Frame-Core Tube Structures

In recent years,many high-rise buildings have sprung up,and the optimization of their cost and performance has emerged in endlessly.In the optimization of high-rise structures,the selection of optimization objectives,the research and improvement of optimization algorithms,the treatment of optimization variables and constraints have attracted a large number of researchers.This paper focuses on the selection of optimization constraints and the relationship between them in the optimization process,and attempts to achieve cross-section optimization of frame-core tube structure by means of computer technology.(1)The fringe constraints in the specifications are classified and screened.Based on the cross-section optimization problem of frame-core tube high-rise structure,the criteria for constraints screening are formulated.At the same time,several groups of high-rise cases with different heights and cross-sections are designed.As an example of this paper,the sensitivity of constraints on cross-section dimension variables is analyzed based on the data of examples,and the constraints with high sensitivity to cross-section variables are screened out.(2)The important constraints selected are further analyzed and the relationship between constraints is studied.According to the results of the analysis of the example,the constraints with high degree of correlation are fitted on the basis of considering the physical relationship between constraints,and the fitting results are validated and evaluated according to the analysis data of the actual building structure and other high-rise structure models.(3)Computer technology is used to optimize the section of frame-core tube structure and reasonable results are obtained.Firstly,the characteristics of frame-core tube section optimization are analyzed,and the optimization objectives,constraints and variables are dealt with to improve the optimization efficiency.At the same time,the parametric model of frame-core tube is established in the parametric design software Rhino and its plug-in Grasshopper,and the optimization algorithm is compiled in C# language,and the phase is compiled through the interface provided by the finite element software.The program connects the parametric design software with the finite element analysis software,and completes the optimization of a frame-core tube example.