To Calculation of Fillet Welds
https://doi.org/10.21122/2227-1031-2020-19-5-367-371
Abstract
When making welded joints, it is not always possible to press tightly elements to be joined before surfacing the weld. In normative documents on welded joints, the allowable gap between the elements to be connected can reach 3 mm when welding with a covered electrode and 2 mm when welding in shielded gases. At the same time the presence of a gap is not taken into account in the standards for calculation of welded joints. Experimental studies have been carried out to determine effect of the gap on the bearing capacity of the weld. Specimens have been made with welded joints of two types: for work in shear and pull-out. For the purpose of comparison, half of the specimens have been made without gaps, and the other half with gaps between the elements to be joined. The specimens have been made at the Minsk plant of technological metal structures, and their tests have been carried out in a research laboratory of the Belarusian National Technical University. Based on the results of the experiments, it has been concluded that the gaps between the elements to be joined significantly reduce the bearing capacity of the welded joints. In addition, inspection of fracture surfaces have shown that, in the presence of a gap, the cut surfaces of the weld pass along the fusion boundary of the base and deposited metals. It has been experimenttally established that the existing gap leads to a slight increase in the penetration depth. However, the latter factor does not compensate for the decrease in the bearing capacity of the welded joint due to the presence of a gap between the elements to be joined.
About the Authors
E. Yu. DavydovBelarus
Address for correspondence: Davydov Eygeney Yu. – Belаrusian National Technical University, 25/1, F. Skoriny str., 220114, Minsk, Republic of Belarus. Tel.: +375 17 265-96-97
davydov@bntu.byA. I. Bondarovich
Belarus
Minsk
References
1. SNiP [Construction Rules and Regulations] II-23–81*. Steel Structures. Moscow: Publishing House of USSR State Committee for Construction, 1991. 38 (in Russian).
2. SNiP [Construction Rules and Regulations] II-23–81*: СП 16.13330.2017. Revised Edition. Steel Structures. Moscow, 2017. 148 (in Russian).
3. State Standard 5264–80. Manual Arc Welding. Welded Connections. Main Types, Structural Elements and Dimensions. Moscow, Standartinform Publ., 2010. 35 (in Russian).
4. State Standard 14771–76. Arc Welding in Shielding Gas. Welded Connections. Main Types, Structural Elements and Dimensions. Moscow, Standartinform Publ., 2007. 39 (in Russian).
5. State Standard 11533–75. Automatic and Semi-Automatic Submerged Arc Welding. Welded Joints at Sharp and Obtuse Angles. Main Types, Structural Elements and Dimensions. Moscow, Publishing House of Standards, 1975. 39 (in Russian).
6. State Standard 11534–75. Manual Arc Welding. Welded Joints at Sharp and Obtuse Angles. Main Types, Structural Elements and Dimensions. Moscow, Publishing House of Standards, 1976. 23 (in Russian).
7. State Standard 23518–79. Arc Welding in Shielding Gas. Welded Joints at Sharp and obtuse Angles. Main Types, Structural Elements and Dimensions. Moscow, Standartinform Publ., 2011. 27 (in Russian).
8. State Standard 8713–79. Submerged Arc Welding. Welded Connections. Main Types, Structural Elements and Dimensions. Moscow, Standartinform Publ., 2005. 39 (in Russian).
9. State Standard 23118–2012. Steel Building Structures. General Specifications. Moscow, Standartinform Publ., 2013. 40 (in Russian).
10. ТCP [Technical and Commercial Proposal] 45-5.04-121–2009 (02250). Steel Building Structures. Manufacturing Rules. Minsk: Ministry of Architecture and Construction of the Republic of Belarus, 2009. 35 (in Russian).
Review
For citations:
Davydov E.Yu., Bondarovich A.I. To Calculation of Fillet Welds. Science & Technique. 2020;19(5):367-371. (In Russ.) https://doi.org/10.21122/2227-1031-2020-19-5-367-371