Wyniki wyszukiwania - Biblioteka Nauki

1

Rośliny pnące na budowlach zabytkowych

100%

Jackiewicz B. , Borowski J.

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1998

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nr 4

402-417

EN

In the opinion of the authors climbers can and should be introduced onto historical objects. The specificity of the latter determines the presence of plants and imposes the observation of certain principles: 1. The historical object is assigned priority, and the introduced plants should accentuate its aesthetic and historical qualities. The climber appears only as the “guest” of the object. 2. All activity concerning historical objects and plants should aim at the restoration of old historical configurations. Historical monuments are testimony of past epochs, and thus should reflect, as faithfully as possible, the former spatial organisation of interiors, panorama and vistas. Newly created configurations, granted contemporary forms, should be adapted to the historical surrounding. 3. The rule of shaping vegetation should be based on the principle of natural qualities and freedom, with the retention of the character and style of the given object. Property introduced plants supplement the composition of the object. 4. In those cases when climbers start dominating the object, the plants should be restricted by suitable steps (e. g. pruning) or even eliminated. 5. Plants may be applied only on suitably prepared and protected objects. 6. All decisions and intervention as regards historical objects, including the introduction of plants, must be coordinated with appropriate conservation agencies, which supervise the objects, and be subject to their surveillance. The specific properties of climbing plants, which often have direct contact with historical material, require exceptionally well planned and bold undertakings. The great merit of the climbers is undoubtedly the ease and speed with which it is possible to obtain the desired effect. Other important traits are the possibility of growth and upkeep in conditions of limited space and slight access to light as well as small requirements as regards cultivation and feeding.Those features are of great use in conditions of compact development, which is often typical for historical objects — urban complexes, castles and fortresses. The suitable use of climbers is the simplest way to draw attention to the given object, and underline its rank as well as aesthetic and historical excellence.

2

Termorenowacja budowli zabytkowych z wykonaniem wewnetrznego ocieplenia

100%

Häupl P. , Neue J. , Fechner H.

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1998

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tom z. 42

91-98

PL

W opracowaniu analizuje się możliwość wykonania ocieplenia wewnętrznego w zabytkowym budynku mieszkalnym o ścianach kamiennych. Porównuje sie ocieplenie wykonanae z wełny mineralnej oraz płyt Getefix o dobrej przewodności kapilarnej. Wykazuje się, że ocieplenie z płyt Getefix poprawiając izolację cieplną, nie narusza równocześnie warunków wilgotnościowych w ścianie.

EN

The paper analyzes the possibility of intra-thermal technology application in a historic apartament biulding of stone walls. Warming made of mineral wool is compared with the one made of Getefix panels of good capillary conductivity. It is shown that while improving thermal isolation the warming of Getefix panels does not affect moisture conditions in a wall.

3

Analiza stateczności zbocza w warunkach zagrożenia trzęsieniem ziemi na przykładzie cytadeli w Algierze

86%

Koszela J. , Batog A.

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tom R. 35, z. 2

383-393

PL

Artykuł przedstawia problem analizy stateczności skarp cytadeli w Algierze w warunkach zagrożenia trzęsieniem ziemi. Jest to bardzo interesujący obiekt, także pod względem zastosowanego materiału konstrukcyjnego. Jest on budowlą gruntowo-kamienną, zbudowaną głównie z tzw. glinobitki. Przedstawiono uwarunkowania geologiczne i geotechniczne analizowanego problemu. Dobrano metody analizy stateczności w warunkach występowania obciążeń sejsmicznych oraz przeprowadzono wariantową ocenę stateczności. Uzyskane wyniki wskazują na konieczność wykonywania w tak złożonych przypadkach kompleksowych ocen stateczności różnymi metodami, rozpatrując szeroki zakres różnych, potencjalnych mechanizmów utraty stateczności. Przedstawiono potencjalne zagrożenia utraty stateczności skarp oraz zawalenia się konstrukcji cytadeli.

EN

This paper presents the stability analysis problem of the citadel in Algier in case the earthquake risk. There is an interesting masonry object, by reason of used structural material, which consist of stones and compacted soil, so-called pise. Geological and geotechnical conditions of analyzed problem were presented. Methods of analysis were selected to the conditions of appearing of seismic loads. The wide analysis of slope stability were performed. The risk of landslide or collapse of the citadel construction were discussed.

4

The influence of the de-icing salt on the deterioration of rock materials used in monumental buildings

58%

Kłopotowska A. K. , Łukaszewski P.

Studia Geotechnica et Mechanica

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2013

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tom Vol. 35, nr 3

57--68

EN

The de-icing salt has been used for decades to increase safety on the roads and sidewalks. In Poland, mainly the sodium chloride is used in order to maintain the roads in good condition during winter. Like other salts used for surface de-icing, it depresses the freezing point to lower temperatures and has an additional thermal effect by an exothermic reaction. However, this salt causes the accumulation of chlorides in the walls and stone buildings contributing to the deterioration of these facilities. The paper addresses the issue of the influence of salt solutions on the structure and geomechanical properties of rocks at negative temperatures. The study was conducted on the basis of cyclic tests which simulate complex action of both the negative temperature and the salty environment. The conditions for the tests were chosen so as to reflect the actual conditions of the winter in Poland. During the tests, the longitudinal wave propagation velocity, changes in weights of the samples as well as visual changes were recorded which allowed continuous tracking of occurring changes. At the end of the tests, the rock samples were subjected to uniaxial compressive tests. For this purpose, four lithological types were chosen, representing the sedimentary rocks: clastic and carbonate, widely used in stone constructions.