Research on Crossarm Length Optimization Method of Prestressed Stayed Column Based on Buckling Capacity
Prestressed stayed column is a new type of structural component which suitable for large-span spatial structure support.The crossarm length of the prestressed stayed column is a key design parameter that affects its buckling capacity.This article designed two optimization methods for the crossarm length of prestressed stayed columns based on gradient algorithm and multi-population genetic algorithm,and compared the optimization results of the two methods.By deriving the gradient calculation formula for linear buckling load of prestressed stayed columns and elaborating the important strategies and parameters of multi-population genetic algorithms,the optimization processes of two optimization algorithms were determined.And the optimization process is combined to optimize the single-layer cable support column and the three-layer cable support column.The results show that the optimization method based on gradient method has high computational efficiency and fast convergence speed,but it is prone to fall into in local optimal solutions for multivariate optimization.However,multi-population genetic algorithm relies on finite element analysis,but can use parallel computing to ensure optimization efficiency while effectively converging to the global optimal solution for multivariate optimization problems.The research results can be applied to large-span structures,which can effectively improve the utilization rate of structural materials and reduce the amount of building materials used.
万方数据
维普
