Automatic Welding, 2022, №11

2022 №11 (04)

DOI of Article 10.37434/as2022.11.05

2022 №11 (06)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #11, 2022, pp. 35-38

Joining buliding rebars using couplings compressed by explosion

A.G. Bryzgalin, P.S. Shlyonskyi, S.D. Ventsev, E.D. Pekar

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Joining building rebars is a labour-consuming critical process. Arc welding processes are of little use in the cases of application of heat-strengthened building rebars, or such which have a protective layer. It is shown that use of steel couplers, compressed by explosion, allows obtaining strong and reliable joints of building rebars for various applications. Coupler parameters are calculated under the condition of equal strength with the rebar steel. Rupture testing revealed a higher strength of the coupler joint, compared to the strength of rebar beyond which rupture took place. Cyclic fatigue life testing showed that fatigue resistance of coupler joints is higher than what is required by normative documentation. There is experience of application of explosives in large construction sites and in operating industrial facilities. 7 Ref., 2 Tabl., 5 Fig.
Keywords: building reinforcement, reinforcement joint, coupling, fatigue resistance, strength, explosion compression


Received: 04.08.2022

References

1. DSTU B V.2.6-168:2011. Welded rebars and embedded products, welded joints of rebars and embedded products of concrete structures. General technical conditions [in Ukrainian].
2. DSTU B V.2.6-169:2011. Welded joints of rebars and embedded products of concrete structures. Types, structures and dimensions [in Ukrainian].
3. DSTU 3760L:2019. Reinforcing bars for concrete structures. General technical conditions [in Ukrainian].
4. Petushkov, V.G. (2005) Application of explosion in welding technology. Kyiv, Naukova Dumka [in Russian].
5. DBN V.2.3-14:2006. Bridges and pipes. Design rules [in Ukrainian].
6. (2013) Safety rules when handling explosive materials for industrial purposes. Kyiv, Okhorona Pratsi [in Ukrainian].
7. Lobanov, L.M., Bryzgalin, A.G., Dobrushin, L.D. et. al. (2009) Widening of technological capabilities of explosion treatment for reducing residual stresses in welded joints on up to 5000 m3 decomposers. The Paton Welding J., 11, 46-48.

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