Evolutionary optimization of prestressed steel frames
National Research Moscow State Civil Engineering University, Moscow, Russia
Bryansk State University of Engineering and Technology, Bryansk. Russia
A method for the
optimal synthesis of prestressed steel frame structures is developed.
The search for a solution is being carried out by applying discrete
sets of variable parameters, including cross-sections of structural
rods and cross-sections of prestressing tie-rods. It is possible to
vary the location of the prestressing system. To optimize the cost of
the objects under consideration, an improved meth-od of evolutionary
simulation has been used, including a combined scheme for constraints
set and an unusual scheme for the formation of populations. Strength
and stiffness considerations for a number of objects within a
population are not strict, and for variants with breached constraints,
a penalty function has been applied. In forming the current population
used to modify the individuals, multipoint genetic operators, random
generation, and a strategy of elitism have been applied. To vary the
location of the prestressing system and take into account the
multivariance of loads, parallel evolving populations have been
introduced, between which a limited exchange of individuals is allowed.
Examples of optimization of prestressed frames with girders and trusses
frames; evolutionary optimization; a mixed account of constraints;
weakly interacting populations; adaptive genetic operators
Read the whole article in pdf
(Alekseytsev, A.V., Akhremenko, S.A. Evolutionary optimization
of prestressed steel frames. Magazine of Civil Engineering. 2018.
81(5). Pp. 32–42. doi: 10.18720/MCE.81.4.).