Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "podpora" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-4 z 4
    Tytuł:
    Unikalna konstrukcja i technologia - wiadukt Millau
    Autorzy:
    Ajdukiewicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/343373.pdf
    Data publikacji:
    2004
    Wydawca:
    Stowarzyszenie Producentów Cementu
    Tematy:
    wiadukt autostradowy
    wiadukt Millau
    konstrukcja
    faza realizacyjna
    podpora betonowa
    pomost podatny
    nasuwanie pomostu
    Źródło:
    Budownictwo, Technologie, Architektura; 2004, 4; 57-61
    1644-745X
    Pojawia się w:
    Budownictwo, Technologie, Architektura
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Resistance of columns
    Autorzy:
    Eamon, C.
    Alsendi, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/129235.pdf
    Data publikacji:
    2017
    Wydawca:
    PWB MEDIA Zdziebłowski
    Tematy:
    podpora betonowa
    most
    analiza elementów skończonych
    obciążenie wybuchem
    podmuch
    concrete column
    bridge
    finite element analysis
    explosive load
    blast
    Opis:
    A large strain, large displacement finite element model that allows element separation and failure is constructed and validated based on existing results of reinforced concrete columns subjected to blast loads. In this approach, concrete is represented with the Johnson-Holmquist-Cook model while a plastic-kinematic relationship describes steel behavior. The model is used to predict the capacity of typical reinforced concrete bridge columns to resist an assumed blast load scenario, where changes in concrete strength, steel reinforcement ratio, and axial force on the column are considered. The effectiveness of a method of column protection is investigated, where existing columns are wrapped with a relatively inexpensive steel fiber reinforced polymer (SFRP) jacket. It was found that the use of SFRP can significantly enhance the resistance of the columns.
    Źródło:
    Builder; 2017, 21, 12; 66-69
    1896-0642
    Pojawia się w:
    Builder
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interaction principle of rock-bolt structure and rib control in large deformation roadways
    Autorzy:
    Yuan, Xun
    Yang, Shuangsuo
    Powiązania:
    https://bibliotekanauki.pl/articles/1853892.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    budowa dróg
    kopalnia węgla
    podpora betonowa
    rock-bolt structure
    fluctuation balance law
    large deformation roadway
    thick-board support
    Opis:
    Large deformation in roadways is an inevitable problem faced by many coal mines, and bolt installation is widely adopted to keep roadway stability. To provide a theoretical basis for bolt supporting scheme design in order to eliminate hazards associated with roadway failure, the interaction principle between bolts and the bolted strata should be studied thoroughly. This research attempts to investigate the above principle through theoretical analysis through a group of selected statistics from fifteen different coal mines. At the same time, the thick board support method was proposed and applied for controlling the ribs deformation in a particular coal mine. It is concluded that the interaction of the rock-bolt entity is subjected to the fluctuation balance law. When deformation increases, the bolted structure experiences periodic equilibrium variation. Both the supporting force needed to stabilise the surrounding rocks and the supporting capability of bolted strata show a trend of decrease in this process. The interaction principle of surrounding rocks and bolts is in essence the mechanical phenomenon caused by their mutual load transformation, and the load-carrying capacity varies with the bolted structure’s deformation, which is subjected to the following law: elastic roadway>plastic roadway> fractured roadway>broken roadway. The designed bolted thickness of the ribs should be more than 1/5 of roadway height to make full use of the self-stability of surrounding rocks. Finite Difference Method simulation and on-site monitoring data showed that the roof subsidence and ribs convergence of 2201 roadway in Shuguang coal mine was reduced by 83.7% and 88.6% respectively after utilising the proposed support method, indicating that the thick-board method was effective. Results of this research can lay a foundation for support design in large deformation roadways.
    Źródło:
    Archives of Mining Sciences; 2021, 66, 2; 227-248
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    On the resistance of concrete hollow thin-walled high piers to rock collisions
    Autorzy:
    Huang, Yao
    Powiązania:
    https://bibliotekanauki.pl/articles/27312168.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    podpora betonowa
    filar mostowy
    element cienkościenny
    zderzenie
    skała
    siła uderzenia
    uszkodzenie
    odporność na kolizje
    concrete pier
    thin-walled element
    rock
    collision
    collision force
    damage
    collision resistance
    Opis:
    Concrete hollow thin-walled high piers (CHTWHPs) located in mountainous areas may be destroyed by the huge impact force of accidental rocks. The study focuses on analyzing the effects of rock impact on the pier, including its impact force, pier damage, dynamic response, and energy dissipation characteristics. The results show that: (1) Increasing the impact height led to a decrease in the peak impact force. Specifically, 15.5% decrease in the peak collision force is induced when the height of rock collision rises from 10 m to 40 m. (2) The damage mode of the pier’s collision surface is mainly oval damage with symmetrical center, radial damage on the side surface, and corner shear failure on the cross section. (3) The peak displacement of bridge pier increases with the increase of collision height. As the collision height increased from 10 m to 40 m, the bridge pier’s peak displacement also increased, rising by 104.2%. (4) The concrete internal energy gradually decreased with increasing collision height, dropping by 36.9% when the height of rock collision rises from 10 m to 40 m. The reinforcement internal energy showed an increase of 78%. The results of this study may provide reference for the rock collision resistance design of CHTWHPs.
    Źródło:
    Archives of Civil Engineering; 2023, 69, 3; 187--197
    1230-2945
    Pojawia się w:
    Archives of Civil Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies