Optimization Design Of Semi-Rigid Steel Frame

With the rapid development of economy,the iron and steel industry made greatprogresses in our country.Steel frame is a kind of architecture structure which is madewidely nowadays.The research mainly discussed the optimization design methods ofsteel frame with semi-rigid connections,including:simulation of semi-rigidconnections,genetic algorithms and the application in the design of steel frame withsemi-rigid connections.The realistic modeling of beam-to-column connections is an important partduring the analysis and design of steel frames. The connection character directlyaffects the total behavior of steel frames with load added.The behavior ofbeam-to-column connections is treated as either pinned of rigid joints entirely inconventional steel frame analysis.These idealized assumptions predigest the analysisand design of steel frame consumedly,but they could induce insecurity or conservativedesign.In this paper,we consider the precise analysis of connections that could begained by the concept of semi-rigid and turn spring.The p-â–³ effect of steel frame isconsidered because of the great affect of geometric nonlinear in the analysis ofstructure.How to optimize its structure design to enhance its economy under the codedemand is the main problem of the paper. Genetic algorithms is a kind of optimization algorithms which simulatesDarwin's genetic choice and natural elimination biology evolution process.It has greatsuperiority in solving dispersed objective optimization.The paper discusses theoptimization design of the steel frames with semi-rigid connections through geneticalgorithms. Finally, the feasibility and reliability of the algorithms are proved withstructural optimum design of the multistory steel frames.