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References  Architectural Institute of Japan (AIJ): Fracture in steel structures during a severe earthquake (in Japanese). Tokyo, 1995.  JIA, L. - KUWAMURA, H.: Ductile Fracture Simulation of StructuralSteels under Monotonic Tension. Journal of Structural Engineering, 04013115-1-12, 2013, DOI: 10.1061/(ASCE)ST.1943-541X.0000944.  BORDIGNON, N. - PICCOLROAZ, A. - DAL CORSO, F. - BIGON, D.: Strain localization and shear band propagation in ductile materials. Frontiers in Materials, Article 22, 1, 2015.  RICE, J. R.: The Localization of Plastic
In practice, in the design stage of revitalization, renovation or reinforcement, there is often a need to determine the strength of steel as well as its weldability. The strength of steel can be determined in two ways: directly through destructive testing or indirectly - by the Brinell hardness test. In the case of weldability, this turns out to be much more difficult, because there are three groups of factors which determine this property, i.e.: local weldability, operative weldability, and overall weldability. This paper presents the results of the verification of the relationship between the hardness and strength of three grades of steel from the early twentieth century. The evaluation of the overall weldability of structural steels is discussed in an analytical approach preceding costly weldability tests. An assessment based on selected indicators of weldability can only lead to confusion.
layer quality after corrosion load,. Production Engineering Archives, Volume 6, No. 1, 45-48. 10. U lewicz R., M azur M. 2015. Fatigue testing structuralsteel as a factor of safety of technical facilities maintenance, Production Engineering Archives, Volume 1, No. 1, 32-34. 11. V ičan J., K oteš P., Ś piewak A., U lewicz M. 2016. Durability of bridge structural elements , Communication 18(4), 61-67. 12. V ičan J., U lewicz M., C hwastek A. 2015. Assessing the corrosion impact on bearing capacity of steel girder bridges in Poland , Transcom Proceedings
The article discusses the results of a study investigating the effect of the number of fine non-metallic inclusions (up to 2 μm in size) on the fatigue strength of structural steel during rotary bending. The study was performed on 7 heats produced in an industrial plant. Fourteen heats were produced in a 100 ton oxygen converter. All heats were subjected to vacuum circulation degassing.
Steel sections with a diameter of 18 mm were hardened and tempered at a temperature of 200, 300, 400, 500 and 600°C. The experimental variants were compared in view of the applied melting technology and heat treatment options. The heat treatments were selected to produce heats with different microstructure of steel, from hard microstructure of tempered martensite, through sorbitol to the ductile microstructure of spheroidite. The results were presented graphically, and the fatigue strength of steel with a varied share of non-metallic inclusions was determined during rotary bending. The results revealed that fatigue strength is determined by the relative volume of fine non-metallic inclusions and tempering temperature.
The problem of transition zone of structural steel element connected to concrete is discussed in the following paper. This zone may be located for instance in specific bridge composite girder. In such case the composite beam passes smoothly into concrete beam. Because of several dowels usage in the transition zone, the problem of uneven force distribution were discussed through analogy to bolted and welded connections. The authors present innovative solution of transition zone and discuss the results, with emphasis put on the transition zone structural response in term of bending capacity, failure model and force distribution on the connection length. The article wider the already executed experimental test and presents its newest results.
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Reference 1. A l -D uheisat S.A., E l -A moush A.S. 2016. Effect of deformation conditions on the corrosion behavior of the low alloy structuralsteel girders . Materials and Design vol. 89, 342–347. 2. A lizadeh M., B ordbar S. 2013. The influence of microstructure on the protectiveproperties of the corrosion product layer generated on the welded API X70 steel in chloride solution. Corrosion Science 70, 170–179. 3. B ohni H. 2005. Corrosion in reinforced concrete structures . CCR Press England 247 p. 4. C handramouli R., K andavel T.K., S hanmugha S
, N., Szczotok, A., Gadek-Moszczak, A., el al., 2018. The impact of laser processing parameters on the properties of electro-spark deposited coatings , Archives of metallurgy and materials, 63, 809-816. Tsui, L.-K., Garzon, F., 2017. C arbonXS GUI: A graphical front-end for CarbonXS . J. Appl. Crystallogr. 50, 1830-1833. Vicen, M., Fabian, P., Bronček, J., Radek, N., 2019. Effect of PVD coating on change properties of 100Cr6 bearing steel , Slovak Journal of Technolog, 11, 63-66. Ulewicz, R., Mazur, M., 2013. Fatigue testing structuralsteel as a factor of safety
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