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Application Of Steel Bar Bracings In Renovation And Modernization Of Historic Buildings

Abstract

The use of steel bracings is possible in all four stages of engineering activities in the renovation and modernization of historic buildings, i. e.: protecting, repairing, strengthening and rebuilding. Steel bracings are auxiliary structural systems, which, due to their relatively small cross-section dimensions and low weight, provide an efficient way to achieve the required resistance and stability of the original historic building structural systems. The steel structure in most cases is the tissue that differs in style and material of genuine tissue which is present in a renewed historic building, but is also often a rational solution acceptable to the conservation and structural point of view.

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Strength Analysis of a Large-Size Supporting Structure for an Offshore Wind Turbine

. VON DER HAAR, C and MARX, S. Design aspects of concrete towers for wind turbines. J. S. Afr. Inst. Civ. Eng. 2015, vol.57, n.4, pp. 30-37. ISSN 2309-8775. http://dx.doi.org/10.17159/2309-8775/2015/v57n4a4. 49. DNV-OS-B101, OFFSHORE STANDARD, METALLIC MATERIALS, Det Norske Veritas 2009 50. EN 10025-2 - Non-alloy structural steels, European Committee for Standardization, 2005

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Influence of Heat Input on the Content of Delta Ferrite in the Structure of 304L Stainless Steel GTA Welded Joints

References BRZIAK, P., PIUSSI, V., BERNASOVSKÝ, P., et al.: Materiály a ich správanie sa pri zváraní. Bratislava: VÚZ, 2003, 355s. CASTRO, R., J. J. De CADENET,: Welding Metallurgy of Stainless and Heat resisting Steels , Cambridge University Press, Cambridge, 1974. ISBN 0521 20431 HRIVŇÁK, I.,: Zvariteľnosť ocelí. Bratislava: Alfa, 1979, 235s. ISBN 80-224-0016-5 EN ISO 5847 - Welding — Fusion-welded joints in steel, nickel, titanium and their alloys

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Reaction of Unalloyed and Cr-Mo Alloyed Steels with Nitrogen from the Sintering Atmosphere

Abstract

Nitrogen is usually regarded as an inert sintering atmosphere for PM steels; however, this cannot be taken for granted in particular for steels alloyed with nitride forming elements. Among those elements, chromium has become more and more important as an alloying element in sintered low alloy structural steels in the last decade due to the moderate alloying cost and the excellent mechanical properties obtainable, in particular when sinter hardening is applied. The high affinity of Cr to oxygen and the possible ways to overcome related problems have been the subject of numerous studies, while the fact that chromium is also a fairly strong nitride forming element has largely been neglected at least for low alloy steel grades, although frequently used materials like steels from Cr and Cr-Mo prealloyed powders are commonly sintered in atmospheres consisting mainly of nitrogen.

In the present study, nitrogen pickup during sintering at different temperatures and for varying times has been studied for Cr-Mo prealloyed steel grades as well as for unalloyed carbon steel. Also the effect of the cooling rate and its influence on the properties, of the microstructure and the composition have been investigated. It showed that the main nitrogen uptake occurs not during isothermal sintering but rather during cooling. It could be demonstrated that a critical temperature range exists within which the investigated CrM-based steel is particularly sensitive to nitrogen pickup.

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Numerical Analysis of Thin-Walled Purlins Restrained by Sheeting in Elevated Temperature Conditions

References 1. Design Manuals, “Steel Buildings in Europe, Single-Storey Steel Buildings, Part 7, Fire engineering”, Arcelor Mittal, 2008. 2. DIFISEK, “Dissemination of Fire Safety Engineering Knowledge”, Poznan University of Technology, 2008. 3. Eurocode 3, EN 1993-1-1, Design of steel structures, Part 1-1 General rules and rules for buildings, European Committee for Standardization, 2005. 4. Eurocode 3, EN 1993-1-2, Design of steel structures, Part 1-2 Structural fire design. European Committee

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Positron and nanoindentation study of helium implanted high chromium ODS steels

R eferences [1] M. A. Pouchon, J. Chen, M. Dobeli and W. Hoffelner, “Oxide dispersion strengthened steel irradiation with helium ions”, J. Nucl. Matter. , 352 (2006) 5761. [2] K. Yutani, H. Kishimoto, R. Kasada and A. Kimura, “Evaluation of Helium effects on swelling behavior of oxide dispersion strengthened ferritic steels under ion irradiation”, J. Nucl. Matter. , 367370 (2007) 423427. [3] M. B. Toloczko, F. A. Garner and S. A. Maloy, “Irradiation creep and density changes observed MA 957 pressurized tubes irradiated to doses of 40110 dpa at

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Influence of heat transfer on corrosion behaviour of materials for radioactive waste canisters in synthetic bentonite pore water and bentonite suspension

LITERATURA 1. Prošek, T., et al., Influence of heat flux and surface temperature on the intergranular corrosion of stainless steel. Materials and Corrosion 2005, 56 (5), 312-317. 2. Prošek, T.; Novák, P., Initiation and propagation of stainless steel pitting corrosion under heat flux. Materials and Corrosion 2003, 54 (12), 933-939. 3. Stoulil, J.; Bystriansky, J., Influence of heat flux on localised corrosion of stainless steel under boiling conditions. Materials and Corrosion 2011, 62 (8), 760-765. 4. Dobrev, D., et al

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Condition evaluation of steel X65 in one of the sections of “Soyuz” gas main after long-term operation

REFERENCES 1. Kryzhanivs’kyi E. I., Nykyforchyn H. M. Specific features of hydrogen-induced corrosion degradation of steels of gas and oil pipelines and oil storage reservoirs, Mat. Sci., 2011 , 47(2), 127-136. 2. Bolzon G., Zvirko O. An indentation based investigation on the characteristics of artificially aged pipeline steels, Proc. Struct. Integr. , 2017 , 3, 172-175. 3. Nykyforchyn H. M., Zvirko O. I., Tsyrulnyk O. T. Hydrogen assisted macrodelamination in gas lateral pipe, Proc. Struct. Integr., 2016 , 2, 501-508. 4

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Constructional Features of Ropes in Functional Units of Mining Shaft Hoist

sliding parameters, Advances in Mechanical Engineering , 8(12), 1-14. 6. Guo Y.B., Zhang D.K., Yang X.H., Feng C.N., Ge S.R. (2017), Experimental research on effect of wire rope transverse vibration on friction transmission stability in a friction hoisting system, Tribology International , 115, 233-245. 7. Hansel J. (ed.) (2000), Steel-rubber balances ropes SAG. Scientific and Technical Papers KTL – AGH Kraków, 19, 1-125 (in Polish). 8. Kwaśniewski J. (2010), Magnetic steel ropes tests. AGH Publishers, Kraków (in Polish). 9. Li S.L., Hu

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Connection Capacity of the Transition Zone in Steel-Concrete Hybrid Beam

. Schweissen und Schneiden 29, Heft 4, 1977. 5. Kozioł P., Kożuch M. P., Lorenc W., Rowiński S.: Innovative solution of transition zone in steel-concrete hybrid beam , Recent progress in steel and composite structures: proceedings of the XIII International Conference on Metal Structures (ICMS2016), Zielona Góra, Poland, 15-17 June 2016, , pp. 137–142, 2016. 6. Kozioł P., Lorenc W.: Analiza połączenia stali z betonem w strefie przejściowej dźwigara zespolonego stalowo-betonowego , Materiały Budowlane, vol. nr 5, no. Journal Article, pp. 97–98, 2016. 7

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