Estimation of Fracture Strength of Welded Joints with Weld Defects

摘要

When weld-joining the beam ends, because it is very easy to attach the tab, cases are increasing in which the alternative tab is applied. With a welding method using alternative tabs, a weld defect is liable to occur at the beam end, and therefore a number of fracture tests have been conducted for weld joints having artificial defects since the occurrence of the Great Hanshin Earthquake. Based on the existing test results and targeting at brittle fractures caused by weld defects occurring at the weld start/ end section, we attempted to structure a fracture strength estimation equation by the use of linear fracture mechanics.