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    Wyświetlanie 1-3 z 3
    Tytuł:
    Floating platforms made of monolithic closed rectangular tanks
    Autorzy:
    Szymczak-Graczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/200091.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    floating platforms
    rectangular tank
    hydrostatic load
    temperature load
    ice floe load
    bending moments
    definite difference method
    platformy pływające
    zbiornik prostokątny
    obciążenia hydrostatyczne
    obciążenie temperaturowe
    momenty zginające
    Opis:
    The paper concerns closed monolithic rectangular tanks produced in one stage (one technological process without interruptions or dilatations) that function as floating platforms in inland waters. It presents an analysis of static work of the above-described tanks subject to the hydrostatic load of walls and bottom as well as the uniform load of the upper plate. Calculations were made with the use of the finite difference method in terms of energy, assuming the Poisson’s ratio ν = 0. Based on the obtained results, charts are provided that illustrate the variation of bending moments for the characteristic points of the analysed tanks as per specific workloads. The paper also provides test calculations for buoyancy, stability and the metacentric height for one type of the tank that was produced for the study. In this case, in addition to the above-mentioned loads, the calculation also took into account load temperature and ice load floe. The paper presents photographs taken when launching a pontoon prototype.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 2; 209-216
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental validation of numerical static calculations for a monolithic rectangular tank with walls of trapezoidal cross-section
    Autorzy:
    Buczkowski, W.
    Szymczak-Graczyk, A.
    Walczak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/199784.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rectangular tank
    walls of trapezoidal cross-section
    finite difference method
    coordinate measurement arm
    zbiornik prostokątny
    przekrój trapezowy
    metoda różnic skończonych
    Opis:
    The article presents the results of validation of static calculations carried out for a monolithic rectangular tank with walls of trapezoidal cross-section. Static calculations were made with the use of software based on the finite element method (FEM) and the finite difference method (FDM) in terms of energy (including spatial static work of the tank). Validation of the results was conducted on a concrete tank model using an innovative measurement tool, i.e. a coordinate measuring arm with a touch probe.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 799-804
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-criteria diagnostics of historic buildings with the use of 3D laser scanning (a case study)
    Autorzy:
    Szymczak-Graczyk, Anna
    Walczak, Zbigniew
    Ksit, Barbara
    Szyguła, Zdzisław
    Powiązania:
    https://bibliotekanauki.pl/articles/2173661.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    laser scanning
    diagnostics
    historic buildings
    limit state method
    beam deflection
    mycological test
    skanowanie laserowe
    diagnostyka
    budynek historyczny
    metoda stanów granicznych
    ugięcie belki
    test mikologiczny
    Opis:
    The protection and use of historic buildings is a difficult and costly task. Most often, these objects are under conservatory protection and any interference in their structure requires appropriate consent. On the other hand, conducting construction works on historic buildings carries a high risk of their damage or even destruction. Therefore, proper prior diagnostics is an extremely important factor affecting the scope and manner of works to be conducted. The paper presents the use of 3D scanning to determine the deflection of the ceiling under the Column Hall of the historic Palace, the floor of which showed elasticity, recorded during changing service loads. After identifying the places with the greatest deflections, based on data from 3D laser scanning, test holes were made and wood samples from the ceiling were taken to perform moisture content and mycological tests. An endoscopic inspection camera was inserted into test holes, providing the basis for recognizing the structure of the ceiling, i.e. arrangement of layers as well as dimensions and spacing of ceiling beams. Strength calculations were made with the limit state method resulted in the determination of the maximum permissible service load on the ceiling. The presented course of action in diagnostics of the analysed historic building may be an example of a preliminary procedure to be taken before deciding on changes in the manner of use of historic buildings or the functionalities of their individual parts.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140373
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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