Searching for optimal prestressing of steel bar structures based on sensitivity analysis

• Autorzy: Yurchenko V. V. , Peleshko I. D.

Identyfikatory

DOI

10.24425/ace.2020.134411

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

parametric optimization; redundant member; initial prestressing force; optimal prestressing; sensitivity analysis; gradient projection method

PL

optymalizacja parametryczna; element zbędny; siła sprężająca początkowa; sprężenie optymalne; analiza wrażliwości; metoda rzutowania gradientu

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2020
• Tom: Vol. 66, nr 3
• Strony: 525--540
• Opis fizyczny: Bibliogr. 27 poz., il., tab.

Twórcy

autor

Yurchenko V. V.

• Kyiv National University of Construction and Architecture, Faculty of Civil Engineering, Department of Steel and Timber Structures, Kyiv, Ukraine

autor

Peleshko I. D.

• Lviv Polytechnic National University, Institute of Civil Engineering and Building Systems, Department of Building Production, Lviv, Ukraine

Bibliografia

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