- Tytuł:
- Searching for optimal prestressing of steel bar structures based on sensitivity analysis
- Autorzy:
-
Yurchenko, V. V.
Peleshko, I. D. - Powiązania:
- https://bibliotekanauki.pl/articles/230774.pdf
- Data publikacji:
- 2020
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
optymalizacja parametryczna
element zbędny
siła sprężająca początkowa
sprężenie optymalne
analiza wrażliwości
metoda rzutowania gradientowego
parametric optimization
redundant member
initial prestressing force
optimal prestressing
sensitivity analysis
gradient projection method - Opis:
- The paper considers parametric optimization problems for the steel bar structures formulated as nonlinear programming ones with variable unknown cross-sectional sizes of the structural members, as well as initial prestressing forces introduced into the specified redundant members of the structure. The system of constraints covers load-bearing capacity constraints for all the design sections of the structural members subjected to all the design load combinations at ultimate limit state, as well as displacement constraints for the specified nodes of the bar system, subjected to all design load combinations at serviceability limit state. The method of the objective function gradient projection onto the active constraints surface with simultaneous correction of the constraints violations has been used to solve the parametric optimization problem. A numerical technique to determine the optimal number of the redundant members to introduce the initial prestressing forces has been offered for high-order statically indeterminate bar structures. It reduces the dimension for the design variable vector of unknown initial prestressing forces for considered optimization problems.
- Źródło:
-
Archives of Civil Engineering; 2020, 66, 3; 525-540
1230-2945 - Pojawia się w:
- Archives of Civil Engineering
- Dostawca treści:
- Biblioteka Nauki
Artykuł