Abstract
The study of the influence for design solution detailing on the cost of reinforced concrete structures during their optimization is carried out. A hypothesis is formulated on the final improvement of the target criterion with an increase in the number of variable parameters. Depending on this number, the concepts of three levels of detail are introduced, at which optimization can be carried out, and the degree of risk of failure of the structure is indicated for them. Using the example of finding a constructive solution for a reinforced concrete beam by the cost minimization criterion, the relationship of the cost change is shown when the number of independently variable parameters changes. The normal operation of the beam and the emergency action effects in the form of local damage to a single corner connection are taken into account. Genetic algorithms are used for the optimization.
Highlights
The design of load-bearing building structures is associated with the fulfillment of design requirements and the implementation of unification
The practice of using genetic algorithms has shown that problems with a fairly large number of variable parameters can be solved on their basis; with an increase in the number of these parameters, the convergence of the computational process towards the optimal solution deteriorates
The actual design process is inevitably associated with an increase in the number of variable parameters, due to the ever-increasing complexity of design solutions
Summary
The design of load-bearing building structures is associated with the fulfillment of design requirements and the implementation of unification. Some aspects of this problem have been discussed in [23, 24]. The selected details of the design solution should ensure both regulatory operational requirements and survivability conditions under emergency action By influences this emergencies we mean the failure of key load bearing elements, supports or their parts caused by mechanical damage. The minimization of its cost is taken as a goal criterion
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