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Verification of the fatigue resistance of 40 kN pin load gauges from ČSN 17 029 material
Šperl, Martin; Gajdoš, Lubomír; Bejdl, Jan
2022 - Czech
Fatigue loading in three-point bending of two pin load gauges from ČSN 17 029 steel was carried out in the load range 5 – 35 kN for two million cycles to prove the required fatigue resistance of the pins. Únavové zatěžování v tříbodovém ohybu dvou čepových tenzometrů z oceli ČSN 17 029 bylo provedeno v rozsahu zatížení 5 – 35 kN na dva miliony cyklů pro prokázání požadované únavové odolnosti čepů.
Keywords:
pin load gauge; fatigue; pulsating loading; three-point bending
Available at various institutes of the ASCR
Verification of the fatigue resistance of 40 kN pin load gauges from ČSN 17 029 material
Fatigue loading in three-point bending of two pin load gauges from ČSN 17 029 steel was carried out in the load range 5 – 35 kN for two million cycles to prove the required fatigue resistance of the ...
Analysis of displacement measured during the compressive testing of cylindrical specimens
Frantík, P.; Lisztwan, D.; Kumpová, Ivana; Daněk, P.; Rovnaníková, P.; Keršner, Z.
2022 - Czech
The paper deals with selected aspects of the analysis of the displacement and deformation stiffness of cylindrical specimens during compressive tests. A developed correction model is presented, and two types of material were selected for the adjustment of the correction model: concrete from an existing structure, and alkali-activated aluminosilicate composite. The correction model was calibrated using the test response of a steel cylinder. Příspěvek se zabývá vybranými aspekty analýzy posunutí a deformační tuhosti tlačeného válce. Představen je korekční model, k jehož odladění byly vybrány dva druhy materiálu: beton stávající konstrukce a alkalicky aktivovaný alumosilikát. Korekční model byl kalibrován na ocelovém válci.
Keywords:
compressive test; cylindrical specimen; concrete
Fulltext is available at external website.
Analysis of displacement measured during the compressive testing of cylindrical specimens
The paper deals with selected aspects of the analysis of the displacement and deformation stiffness of cylindrical specimens during compressive tests. A developed correction model is presented, and ...
Material tests of pipe samples takes from high pressure gas pipeline Sviňomazy-Vřesová (locality L177 / 2), II. stage of part B1 (hydrogen exposure)
Gajdoš, Lubomír; Šperl, Martin; Šorm, Filip; Bejdl, Jan
2021 - Czech
The main goal of this work is the evaluation of hydrogen effect to material properties of the pipeline steel and its possible transformations. Práce slouží k posouzení vlivu vodíku na případnou změnu materiálových vlastností oceli plynovodu.
Keywords:
hydrogen exposure; gas pipeline; autoclave; material properties
Available at various institutes of the ASCR
Material tests of pipe samples takes from high pressure gas pipeline Sviňomazy-Vřesová (locality L177 / 2), II. stage of part B1 (hydrogen exposure)
The main goal of this work is the evaluation of hydrogen effect to material properties of the pipeline steel and its possible transformations.
Characterization of injection material Ledan TA1 for the needs of the preservation of the architectural fragment located under the 3rd courtyard of Prague Castle
Slížková, Zuzana; Viani, Alberto; Frankeová, Dita; Mácová, Petra; Ševčík, Radek; Fabeš, Roman
2021 - Czech
For the purpose of restoring a Romanesque fragment of marl nearby the Old Royal palace, a material survey of the LEDAN TA1 product was carried out. The study aimed to assess the compatibility of this preservative material with historic marl masonry. Pro účel restaurování opukového zdiva, zejména románského fragmentu z opuky poblíž Starého královského paláce, byla provedena analýza injektážního pojiva LEDAN TA1. Materiálový průzkum produktu LEDAN TA1 byl motivován úkolem posouzení kompatibility tohoto konzervačního materiálu s historickým opukovým zdivem.
Keywords:
LEDAN TA1; marl masonry; preservation
Available at various institutes of the ASCR
Characterization of injection material Ledan TA1 for the needs of the preservation of the architectural fragment located under the 3rd courtyard of Prague Castle
For the purpose of restoring a Romanesque fragment of marl nearby the Old Royal palace, a material survey of the LEDAN TA1 product was carried out. The study aimed to assess the compatibility of this ...
Survey of the ceiling structure of the library in the Jesuits dormitory in Telč
Válek, Jan; Skružná, Olga
2021 - Czech
The aim of the non-destructive survey was to reach better description of the ceiling structure before the planned reconstruction of the library. Cílem nedestruktivního průzkumu bylo bližší poznání stropní konstrukce před plánovanou rekonstrukcí knihovny.
Keywords:
ground penetrating radar (GPR); non-destructive survey; radargrams; cultural heritage
Available at various institutes of the ASCR
Survey of the ceiling structure of the library in the Jesuits dormitory in Telč
The aim of the non-destructive survey was to reach better description of the ceiling structure before the planned reconstruction of the library.
Stress analysis of vaults in the building of the Masaryk´s University Centre in Telč
Bayer, Jan; Drdácký, Miloš
2021 - Czech
The report summarizes the results of local surveys, expert opinions and analysis concerning the vaults in the building of the former Jesuit dormitory in Telč on Zachariáš Square in Hradec no. 2. The investigation was induced by the lack of inputs data for the assessment of the vaults for a new purpose: the establishment of a public library combined with a gallery. The performed FEM calculations estimated the stresses in the vaults of the room 0.22A and do not replace the static calculation, but can serve as an input information for a possible design project. Zpráva shrnuje výsledky z místních šetření, expertních posudků a výpočtů, které se týkají kleneb v objektu bývalé jezuitské koleje v Telči na náměstí Zachariáše z Hradce č.p. 2. Podmětem pro šetření byl nedostatek podkladů pro posouzení zatížitelnost kleneb pro nový účel: zřízení veřejné knihovny kombinované s galerií. Provedené výpočty MKP slouží pro odhad napjatosti klenby v místnosti 0.22Aa nenahrazují statický výpočet, ale mohou sloužit jako podklad pro eventuální zpracování podrobného statického výpočtu.
Keywords:
masonry vaults; ground penetrating radar (GPR); ANSYS; stress analysis; Jesuits dormitory in Telč
Available at various institutes of the ASCR
Stress analysis of vaults in the building of the Masaryk´s University Centre in Telč
The report summarizes the results of local surveys, expert opinions and analysis concerning the vaults in the building of the former Jesuit dormitory in Telč on Zachariáš Square in Hradec no. 2. The ...
Characterization of stone and mortar sampled from Romanesque architectural fragment in archeological site under Prague Castle (CZ)
Slížková, Zuzana; Frankeová, Dita; Bauerová, Pavla; Viani, Alberto; Kozlovcev, Petr; Svoboda, Milan
2021 - Czech
Material characterization of silicite stone and bending earth-lime mortar sampled from the archeological site below the 3rd courtyard of Prague Castle provides data on the chemical and mineralogical composition and microstructure of stone and mortar for the needs of the historic structure conservation. Materiálový rozbor opuky a zdící malty z archeologického terénu pod III. nádvořím Pražského hradu poskytuje údaje o chemickém a mineralogickém složení materiálů a jejich mikrostruktuře pro potřeby konzervace památky.
Keywords:
historic building; material characterization; archeological site; silicite; earth-lime mortar; Mg porozimetry; SEM-EDS analysis
Available at various institutes of the ASCR
Characterization of stone and mortar sampled from Romanesque architectural fragment in archeological site under Prague Castle (CZ)
Material characterization of silicite stone and bending earth-lime mortar sampled from the archeological site below the 3rd courtyard of Prague Castle provides data on the chemical and mineralogical ...
Chemical and microstructural characterization of the artificial stone sample from the sandstone arcade at the Moravský Krumlov Castle
Frankeová, Dita; Koudelková, Veronika; Bauerová, Pavla; Slížková, Zuzana
2021 - Czech
As part of the construction and technical survey, a microscopic analysis of samples of the artificial stone sample was performed using a scanning electron microscope and SEM ‐ EDS analysis. Characterization of mortars' aggregate and binder components was performed, and the binder was identified as portland cement. V rámci stavebně-technického průzkumu byl proveden mikroskopický rozbor vzorku umělého kamene s využitím skenovacího elektronového mikroskopu a SEM‐EDS analýzy. Byla provedena charakterizace plniva a složek pojiva. Analýzy prokázaly, že pojivo umělého kamene je anorganické na bázi portlandského cementu
Keywords:
artificial stone; microscopic characterization; EDS analysis
Available at various institutes of the ASCR
Chemical and microstructural characterization of the artificial stone sample from the sandstone arcade at the Moravský Krumlov Castle
As part of the construction and technical survey, a microscopic analysis of samples of the artificial stone sample was performed using a scanning electron microscope and SEM ‐ EDS analysis. ...
Survey of the constructions hidden under the floor of the castle chapel of All Saints in Telč
Válek, Jan; Skružná, Olga
2021 - Czech
The aim of the non-destructive survey was to determine the presence of building construction hidden under the contemporary floor. The survey confirmed the position of underground crypt and revealed no other structures. Cílem nedestruktivního průzkumu bylo zjistit přítomnost stavebních konstrukcí skrytých pod soudobou podlahou. Průzkum potvrdil polohu krypty a neodhalil žádné další konstrukce.
Keywords:
ground penetrating radar (GPR); non-destructive survey; radargrams; cultural heritage
Available at various institutes of the ASCR
Survey of the constructions hidden under the floor of the castle chapel of All Saints in Telč
The aim of the non-destructive survey was to determine the presence of building construction hidden under the contemporary floor. The survey confirmed the position of underground crypt and revealed no ...
The river dam Slapy - evaluation of material and mechanical properties of the steel quick-closing panels
Šperl, Martin; Gajdoš, Lubomír; Bejdl, Jan
2021 - Czech
An experimental research of the material and mechanical properties of two steel segments cut from quick-closing gate was carried out for suitability assessment to operation. The quick-closing gate is a technology part of the river dam Slapy. Byl uskutečněn experimentální výzkum materiálových a mechanických vlastností dodaných dvou ocelových segmentů vyřezaných z rychlozávěrových vrat VD Slapy pro posouzení způsobilosti k provozu.
Keywords:
steel gate; tensile strength; notch toughness; metallography
Available at various institutes of the ASCR
The river dam Slapy - evaluation of material and mechanical properties of the steel quick-closing panels
An experimental research of the material and mechanical properties of two steel segments cut from quick-closing gate was carried out for suitability assessment to operation. The quick-closing gate is ...
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