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Diagnostyka uszkodzeń elementów murowych na podstawie miar liczbowych procesu drganiowego

Żółtowski Mariusz, Rutkowska Gabriela, Dąbkowski Norbert, Jeleniewicz Katarzyna, Kula Dorota, Szlachetka Olga

Materiały Budowlane

2022

nr 5

24--26

Konstrukcje budowlane i ich elementy muszą spełniać wymagania dotyczące stateczności, sztywności i nośności. Są to warunki decydujące o bezpieczeństwie konstrukcji zarówno w okresie budowy, jak i eksploatacji. Ocena bezpieczeństwa odbywa się na podstawie badań diagnostycznych mających na celu kontrolę jakości wykonania wznoszonych obiektów lub zlokalizowanie uszkodzeń elementów konstrukcji powstałych podczas eksploatacji. W artykule skupiono się na eksperymentalnej analizie modalnej SISO ceramicznych elementów murowych. Doświadczenie przeprowadzono na dwudziestu próbkach cegły pełnej, z czego celowo uszkodzono połowę z nich, aby możliwa była ocena przydatności zastosowanej metody w postawionym problemie badawczym.

Building structures and their elements must meet the requirements related to stability, stiffness and strength. These are the conditions that determine the safety of the structure both during construction and operation. The safety assessment is carried out on the basis of diagnostic tests aimed at checking the quality of the erected objects or locating damages to structural elements caused during operation. The work focuses on the experimental SISO modal analysis of ceramic masonry elements. The experiment was carried out on twenty samples of solid and perforated bricks, half of which were deliberately damaged and thus to be able to assess the suitability of the method used in the research problem posed.

Spatial Diversification of Situation of the Organic Farming in the Polish Voivodeships in the Years 2010–2018

Podawca Konrad, Dąbkowski Norbert

Journal of Ecological Engineering

2020

Vol. 21, nr 6

191--200

The paper raises the problem of changes in situation of the organic farming in Poland. A set of features and indexes characterizing development or recession of the organic farms in individual voivodeships has been worked out. The authors used data for the years 2010–2018, made available in the Local Data Bank, and reports on the state of the organic farms in Poland. Quantitative and areal changes have been presented, concerning firstly the organic farms in relation to all farms as well as the agricultural area and, secondly, certified farms in relation to the organic farms. Using the arithmetic mean of synthetic indexes, the evaluation results have been compared to the synthetic index of usefulness for organic production which was worked out in the Institute of Soil Science and Plant Cultivation (IUNG) in Pulawy. A diversification of the voivodeships has been presented in terms of recession or development of the organic farms. Regions have been also selected where the negative trend of the phenomenon is opposite to that indicated by advantageous conditions for the organic farming. Examples of such voivodeships are Silesian, Holy Cross or Lower Silesian. The performed analysis proves that an interest in the organic farming in Poland significantly decreased in recent years. One can find the recession of the organic farming in 10 voivodeships, even at the level of 30–65% in the Silesian, Holy Cross, Lesser Poland and Subcarpathia. The satisfactory development level of the organic farms through the recent 9 years has been stated only in three voivodeships: Lodz Province, Podlaskie, Warmian-Masurian.