Abstract
A historical building undergoing restoration has surviving sandstone columns. Originally, two rows of columns supported the upper storeys. From the technical perspective, some of the columns were in a decidedly bad condition. Cracks were visible which went through the shafts forming cracking planes. The objective was to examine how deep those cracks were and determine whether they formed any oblique shear planes. The ultrasonic method was used for screening and the computer analysis of obtained data was conducted providing the basis for determining the depth of cracks and the range of cracking planes. Mentioned columns are localized in one of buildings belonging to Krzyżowa Historical Complex (Poland).
Résumé
Les colonnes dont il est ici question constituent le support des voûtes croisées de l’un des bâtiments du Centre Européen de Réconciliation à Krzyżowa en Pologne. Dans le passé, ce complexe appartenait à la famille allemande von Moltke.
Suite à des travaux de modernisation, l’édifice susmentionné a changé de fonction et a été rehaussé d’un étage. Des doutes sont apparus concernant la sécurité de la construction. Cette menace résultait de fissurations visibles, se propageant le long des colonnes en grès. Certaines de ces fissures partaient en oblique, laissant suggérer l’existence d’un plan tangentiel interne. La capcité de charge de ces éléments serait proche de zéro.
Dans ce travail, on a présenté le déroulement et les résultats des examens réalisés sur les colonnes en utilisant la méthode ultrasonore. Dans le même temps, on a montré, grâce à l’analyse sur ordinateur des résultats des examens, la géométrie des fissures des colonnes étudiées.
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Jasieńko, J., Stawiski, B. Analysis of cracking plane geometry in old sandstone columns. Mat. Struct. 34, 248–252 (2001). https://doi.org/10.1007/BF02480596
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DOI: https://doi.org/10.1007/BF02480596