Abstract
A new technology is developed for welding multi-span bridge constructions. The mechanical properties and structure of the low-carbon bridge steel welds have been studied. The welding parameters and application of steel-glass liners provide for long-term service of steel constructions in conformity with the welding industry specifications.
Highlights
Most critical steel constructions in Russia contain a multitude of non-detachable junction parts produced by the method of electric arc welding
The large dendrites were aligned horizontally with respect to the weld axis, which suggested that the heat removal had occurred mostly to the welded metal, which caused an insignificant growth of crystallites in the vicinity of glass liner (Fig. 1 a, b)
The results suggest that the weld properties are in conformity with the GOST welding standards as well as the specifications of welding production
Summary
Most critical steel constructions in Russia contain a multitude of non-detachable junction parts produced by the method of electric arc welding. This has led to a widespread use of field welding of all-climate bridge constructions, e.g. highway span bridges, foot bridges, including overpasses, viaducts, trestle bridges, etc. [see, e.g. STP 005-97 ‘Field welding technology of steel bridge constructions’]. Field welding technologies are widely used in highway span bridge construction, which provides savings in materials, time and manpower. Considering the extreme climatic conditions of the Far North and Siberia, fast heat removal from the copper liner frequently appears unwarranted. Since copper is expensive material, more cost-effective materials for welding liners are needed
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