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W pracy przeanalizowano zabezpieczenie głębokiego wykopu w postaci rozpieranej ściany szczelinowej na przykładzie planowanej inwestycji przy ulicy Tamka w Warszawie. Przeprowadzono obliczenia sił wewnętrznych i przemieszczeń z wykorzystaniem metod Bluma i modułu reakcji podłoża. Sprawdzono możliwe do wystąpienia stany graniczne nośności i użytkowalności. Przeanalizowano także osiadanie powierzchni...
This paper presents the design of prototypes, methods of testing and analysis of the strength of concrete beams reinforced with rebar connections. To determine the characteristics of strength, deformation and fracture of experimental beams were tested to complete re-fracture. It is shown that it is possible to restore the strength of reinforced concrete beam by 77-90% by treatment with modern injection...
For reinforcement of prestressed concrete structures using reinforced thermo-hardened steel rebar standard length 12 m class A400, A500, A600, A800 with periodic profile. However, thermo-hardened steel rebar is essential for the production flaw - bad soldered, welded connection to that she did not meet the performance requirements for fittings in this class. Since adhesion to concrete reinforcement...
The article contains experience in strengthening critical large-cast reinforced concrete monolith structures under heavy-load conditions on the operating construction enterprise. Herewith measures aimed to strengthen reinforced concrete loading ramp retaining wall resulted in the change of operation scheme as flagstone with outline abutment to classic operation scheme of retaining wall with reverse...
For the economy of material in composite building constructions of ceiling and coverage prestressing of a lower subdiagonal is used. To simplify the process of optimal cross-section elements selection in the combined subdiagonal systems and their geometrical descriptions equation of a strain unbreak has been used. The example of the 6m span combined steel construction calculation that works in composition...
W pracy przedstawiono zastosowanie rozkładu wartości osobliwych (SVD) macierzy wydłużeń do analizy jakościowej kratownic oraz konstrukcji tensegrity. Rozkład taki pozwala na określenie mechanizmów infinitezymalnych oraz stanów samorównoważnych sił podłużnych konstrukcji. Znajomość takich stanów pozwala z kolei określić, czy rozważana kratownica znajduje się w konfiguracji tensegrity. Rozważania teoretyczne...
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