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Browsing by Subject "concrete chimneys"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Badania właściwości dynamicznych wysokich kominów żelbetowych
    (Wydawnictwa AGH, 2006) Oruba, Rajmund 
    The problem of dynamic measurements of industrial reinforced concrete chimneys H = 100+300 m was described in the paper. These measurements enabled to evaluate natural frequency, vibration forms and vibration damping of this objects. Dynamic characteristics are needed to diagnose and safety evaluation of chimneys. This problem is very important in regions of paraseismic mining shocks, e.g. at Legnicko-Głogowski Copper District (LGOM). The particular notice in the paper was put on the vibration excitation of chimneys in their natural scale. Examples of organization of investigations and arrangement of testing measurement equipments were given. Authors presented dynamic measurement results of 16 high reinforced concrete chimneys.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Wykorzystanie rdzeniowych próbek betonu do badania korozyjnej degradacji żelbetowych kominów przemysłowych
    (Wydawnictwa AGH, 2006) Barycz, Stanisław; Oruba, Rajmund 
    Structures of industrial chimneys corroded in the result of long operating. Application of concrete core samples to investigations of corrosive degradation of high reinforced concrete chimneys was presented in the paper. It is the most reliable method to evaluation of technical condition of this objects. Principles of designation of testing places and procedures of sampling by use boring machine with diamond bit were described on the base of many years practice. Physical, chemical and strength laboratory tests of concrete samples were given. Results of this tests makes possibilities for structural analysis and operational safety evaluation of reinforced concrete chimneys.