Effect of Intensity of Bending Restraint on Weld Cracking in Multipass Weld

概要

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Weld cracking is one of the most important problems in constructing steel structures. Investigations have been made to estimate the occurrence of weld cracking by use of the factor such as the intensity of tensile restraint. However, weld cracking is occasionally caused by an angular distortion particularly in multipass weld. The intensity of bending restraint is proposed as a parameter which evaluates quantitatively the restraint of the angular distortion. In this paper, the effect of the intensity of bending restraint on weld cracking in multipass weld is investigated by use of a newly developed small size test called "Bending Restraint Weld Cracking Test (BRC-test)." The occurrence of weld cracking in the actual structure is similar to that in the BRC-test. Therefore, the occurrence of weld cracking can be estimated by use of the intensity of bending restraint from the result of the BRC-test.
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