It is well known that residual stresses and the geometric imperfection have an effect on the ultimate strength of steel structures. This study analyzed the change of residual stress and deformation under partial cross-section loss process at an end stiffener of rolled Hbeam using finite element method. As a result, release of compression residual stress in the partial loss area was observed under the process. Released residual stress was re-distributed to a web and stiffeners around the area. Under the process, the partial loss area caused out-of-plane bending deformation as if it was squashed. Therefore, it was revealed that this behavior might reduce the ultimate strength of the H-rolled beam end.
