TITLE:
Weld Joint Efficiency of the Kazakhstani Constructional Steel
AUTHORS:
Begman Kulbayev, Vladimir Lapin, Alexander Shakhnovich, Tursymbai Tuleyev, Serik Aldakhov, Yerken Aldakhov, Alimzhan Ali
KEYWORDS:
Yield Strength, Tensile Strength, Steel Hardness, Construction Steel, Eurocode, Weld Joints
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.13 No.4,
December
28,
2023
ABSTRACT: In the Republic of Kazakhstan, the regulatory framework in construction based on Eurocodes has been in force since 2015.
However, Kazakhstani produced steel has not been studied for compliance
with the requirements of Eurocode 1993. This has resulted in limited use of
Kazakhstani structural steel in construction. The feasibility of using
structural steel in welded joints has been experimentally investigated. To
verify the application of such joints in construction, including earthquake
engineering, experimental studies of welded joints made of structural steel
produced by Arcelor-Mittal in Temirtau have been carried out. In total, 7 types
of structural steel of various thicknesses were selected. Five specimens have
been used in each series of tests. The Brinell hardness values of the weld
joint, yield strength of steel and tensile strength, relative rupture strain
were determined. It was found that for all types of structural steel, the
quality of weld joints complied with the requirements of Eurocode 1993—a sample
rupture appeared along the plates (main body of the metal), not along the weld
joints. It has been established that structural steel produced in the Republic
of Kazakhstan fully complies with the requirements of Eurocode 1993. The
studies on the dependence of Brinell hardness values of weld joint steel on the
yield strength, tensile strength and relative rupture strain have been carried
out. The correlation dependences between the values of yield strength of steel
and tensile strength, relative rupture strain and BH Brinell hardness were
studied. The results of work will allow for significantly increasing the use of Kazakhstani
structural steel in seismic and conventional areas of the Republic of
Kazakhstan.