In this study, the stresses were determined in a cracking area of a girder with the help of finite element modeling.
As a result of studying the existing methods for determining stresses in welded joints, authors used a method, that takes into account the residual welding stresses and design features of welded girder. These features may increase stresses at welded joints and decrease fatigue life. Design deficiencies and technological features of welded girders were identified. The article is devoted to the stress behavior determination of welded joints in railway girders under external loads and residual stresses. Fatigue cracks at welded joints occur because real stress-strain behavior of welded joints is not taken into consideration by standard design.
