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Fluid pathways within shallow-generated damage zones of strike-slip faults – evidence of map-scale faulting in a continental environment, SW Permo-Mesozoic cover of the Late Palaeozoic Holy Cross Mountains Fold Belt, Poland

Rybak-Ostrowska Barbara, Konon Andrzej, Hurai Vratislav, Bojanowski Maciej, Konon Agnieszka, Wyglądała Michał

Acta Geologica Polonica

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2020

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Vol. 70, no. 1

1--29

EN

The damage zones of exhumed strike-slip faults dissecting Jurassic carbonates in the south-western part of the Late Palaeozoic Holy Cross Mountains Fold Belt reveal second-order faults and fractures infilled with syntectonic calcite. The subsequent development of a structural pattern of microscopic fault-related structures and calcite infillings reflects the activity of strike-slip faults that began in the Late Cretaceous (Late Maastrichtian) and lasted until the early Miocene (Langhian). The fabric of the syntectonic veins provides insights into the evolution of the permeable fault-related structures that were the main pathways for fluid flow during fault activity. Microstructural study of calcite veins coupled with stable isotope and fluid inclusion data indicates that calcite precipitated primarily in a rock-buffered system related to strike-slip fault movement, and secondarily in a partly open system related to the local activity of the releasing Chmielnik stepover or the uplift of the area. The presence of meteoric fluids descending from the surface into damage zones suggest that the strike-slip faulting might have taken place in a nonmarine, continental environment.

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Experimental estimation of thermal emissivity for the roofing paper in blue colour

Zapałowicz Zbigniew, Walterowicz Anna

Archives of Thermodynamics

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2019

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Vol. 40, no. 3

181--194

EN

Effective use of energy in various branches of economy is one of world trends in development of power engineering. Relevant energy consumption occurs during exploitation of buildings, so there is still potential to diminish it as far as heating, ventilation, and air conditioning are concerned. Particularly in summer season, the choice of respective roofing colour can play a decisive role for the heat flux transferred to the inside of the object. Decrease of heat flux causes a lower heat burden to the building and lower power consumption by the air conditioning systems. In winter, on the contrary, heat flux transferred to building’s interior should be higher, as a result, demand of energy for heating will be lower. However, calculations of the heat flux require that energy balance must be made for the object. Unfortunately, not all producers of roofing covers inform about the values of reflectivity and thermal emissivity of their products, which is, in turn, necessary for calculations. In the present paper, research methodology elaborated by authors is proposed for determination of thermal emissivity of roofing covers. The paper presents test stand, methodology, and research results for roofing paper in blue colour (as an example) for which the thermal emissivity is an unknown parameter.

3

Mnin restraining stepover – evidence of significant Cretaceous–Cenozoic dextral strike-slip faulting along the Teisseyre-Tornquist Zone?

Konon A., Ostrowski S., Rybak-Ostrowska B., Ludwiniak M., Śmigielski M., Wyglądała M., Uroda J., Kowalczyk S., Mieszkowski R., Kłopotowska A.

Acta Geologica Polonica

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2016

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Vol. 66, no. 3

429--449

EN

A newly recognized Mnin restraining stepover is identified in the Permo-Mesozoic cover of the western part of the Late Palaeozoic Holy Cross Mountains Fold Belt (Poland), within a fault pattern consisting of dextral strikeslip faults. The formation of a large contractional structure at the Late Cretaceous – Cenozoic transition displays the significant role of strike-slip faulting along the western border of the Teisseyre-Tornquist Zone, in the foreland of the Polish part of the Carpathian Orogen. Theoretical relationships between the maximum fault offsets/ mean step length, as well as between the maximum fault offsets/mean step width allowed the estimation of the values of possible offsets along the Snochowice and Mieczyn faults forming the Mnin stepover. The estimated values suggest displacements of as much as several tens of kilometres. The observed offset along the Tokarnia Fault and theoretical calculations suggest that the strike-slip faults west of the Late Palaeozoic Holy Cross Mountains Fold Belt belong to a large strike-slip fault system. We postulate that the observed significant refraction of the faults forming the anastomosing fault pattern is related also to the interaction of the NW-SE-striking faults formed along the western border of the Teisseyre-Tornquist Zone and the reactivated WNW-ESE-striking faults belonging to the fault systems of the northern margin of the Tethys Ocean.

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Przyczyny zarysowań żelbetowych płyt kołowych przekrywających zbiorniki na ścieki

Buczkowski W., Szymczak-Graczyk A., Walczak Z.

Materiały Budowlane

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2015

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nr 9

63--64

PL

W pracy omówiono przyczyny zarysowań powierzchniowych i obwodowych płyt żelbetowych przekrywających cylindryczne zbiorniki na ścieki. Płyty oparte były na całym obwodzie ścian zbiornika oraz na trzech słupach umieszczonych wewnątrz zbiornika. Przyczyną zarysowań była praca termiczna płyt.

EN

The article presents reasons of surface and circular scratches in reinforced concrete plates covering cylindrical tanks for sewage. Plates were based on the entire circumference of the tank walls and on the three pillars placed inside of the tank. Thermal working of the plates was the cause of scratches.

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Analiza dynamiczna oddziaływania ruchomego koła na pokrywę studni kablowej

Kwaśniewski L.

Drogi i Mosty

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2010

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nr 1

77-98

PL

W pracy przedstawiono wyniki symulacji komputerowych interakcji pomiędzy przejeżdżającym kotem a betonową pokrywą studni kanalizacji kablowej. Wykorzystując najnowsze możliwości programów numerycznych opartych na Metodzie Elementów Skończonych z jawnym schematem całkowania po czasie, zagadnienie rozwiązano w sposób jak najlepiej oddający jego rzeczywisty charakter. W modelu numerycznym uwzględniono wzajemne oddziaływanie kontaktowe pomiędzy obracającym się, trójwymiarowym, pneumatycznym kołem a złożoną z trzech materiałów; betonu, żeliwa i stali zbrojeniowej, odkształcalną konstrukcją pokrywy. Rozpatrzono jedenaście przypadków, różniących się sposobem i poziomem obciążenia, usytuowaniem pokrywy względem powierzchni najazdu, i typem modelu materiałowego dla części betonowej. Otrzymane wyniki pozwalają na oszacowanie maksymalnych naprężeń i określenie współczynnika dynamicznego obciążenia, wyrażającego względny wzrost wielkości opisujących odpowiedź konstrukcji ze względu na efekty dynamiczne.

EN

The paper presents results of computer simulations for interaction between a rolling wheel and a typical cover of precast concrete manhole used for telecommunication network. Applying the most recent features of computer programs based on the Finite Element Method with the explicit time integration, the work was focused on the realistic representation of the actual problem. In the numerical model the interaction is traced between a rotating, three dimensional, pneumatic wheel and a detailed model of the selected cover with all component materials represented separately. Eleven cases were studied with different types and levels of loading, position of the cover and material representation for concrete. A new sophisticated constitutive model for concrete with a three invariant formulation for the failure surfaces, available in program LS-DYNA, was adopted for some of the calculations. The results allow for estimating maximum stresses and dynamic impact factors featuring dynamic effects of the wheel to cover interaction.