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  • 1995-1999
  • 1980-1984  (3)
  • 1983  (1)
  • 1982  (2)
Material
Years
  • 1995-1999
  • 1980-1984  (3)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 16 (1983), S. 457-466 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Résumé L'essaiin situ des ponts exige un très grand savoir-faire et entraîne de lourdes dépenses. Les essais peuvent se donner des objectifs très différents: du simple contrôle de routine au diagnostic visant à localiser les causes de défaillance de la structure. Les essaisin situ peuvent être entrepris dans le but de compléter des études sur modèles, particulièrement lorsqu'on ne peut déterminer tous les paramètres des prototypes et obtenir un modèle expérimental parfaitement fiable. Un certain nombre d'étudesin situ de ponts se trouve décrit dans la littérature. Mais il ne semble pas qu'un effort systématique ait été entrepris pour résumer ces études. Cet article se propose d'examiner avec concision les principaux objectifs des essais retenus, l'instrumentation utilisée ainsi que les développments récents apparus dans l'instrumentation et dans les dispositifs caractéristiques d'essais en vue de mettre en évidence les apports positifs ou les insuffisances. Les objectifs des essais résumés ici vont de la comparaison entre données théoriques et résultats des mesures sous charge statique ou dynamique jusqu'aux essais destructifs des ponts. Cet article comprend les essais décrits et publiés ces 10 ou 12 dernières années sur les superstructures en béton, ainsi qu'un examen des critères d'évaluation et les recommandations pour les travaux publics.
    Notes: Abstract In situ testing of bridges demands considerable expertise and entails heavy expenditure. The objectives of the tests may vary from being merely routine tests to diagnostic tests in order to locate the source of distress in the structure. An attempt is made in this paper to discuss briefly the objectives of the tests and the instrumentation usually employed. Salient features of the tests on concrete bridge superstructures reported in the last decade are summarised. Discussion on the evaluation criteria and recommendations for further work are also included.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    General relativity and gravitation 14 (1982), S. 113-115 
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract It is shown that Karmarkar's condition which has been claimed to be a necessary and sufficient condition for the spherically symmetric (s.s.) space-time to be of class 1 ceases to be sufficient in caseR 2323=0. An s.s. line element which satisfies Karmarkar's condition but ceases to be of class 1 is given. This line element describes a conformally flat perfect fluid distribution with zero density.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 4 (1982), S. 261-266 
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Azoles such as benzotriazole and benzimidazole are used as corrosion inhibitors, particularly for copper. The purpose of this work is to further illuminate the bonding and film growth for benzimidazole-like structures. The interaction of imidazole, benzimidazole, 2-methylbenz-imidazole and benzotriazole with copper surfaces is studied with a quartz crystal oscillator microbalance and with X-ray photoelectron spectroscopy. The copper surface is etched by imidazole in water and in CH3OH and by benzimidazole in CH3OH. A very thin film, probably a monolayer or less, is left behind after etching. Thicker films, 500 to 1000 AÅ, are formed by benzimidazole in water and by 2-methylbenzimidazole in both water and CH3OH. Mechanisms of bonding and film formation for the thin and the thick films are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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