Study on ultimate strength estimation of intermittently welded stiffened plates under uniaxial compression: Fid-Bau Portal

Study on ultimate strength estimation of intermittently welded stiffened plates under uniaxial compression

PhD Mun, Ji Song / PhD Ri, Yong Ho

Abstract In this paper, a simplified method for estimating the ultimate strength of intermittently welded stiffened plates under uniaxial compression is developed. Its plate and stiffener of a stiffened plate are considered as individual beam-columns. The whole span of an intermittently welded stiffened plate is divided into welded and non-welded segments. For modeling the behavior of the intermittently welded stiffened plate, the differential equations which describe the bending of the beam-columns in welded and non-welded segments are considered. Based on the model, the Euler limit load of the intermittently welded stiffened plate is calculated. The intermittently welded stiffened plate is changed into a continuously welded one with the equivalent Euler limit load. The Paik's empirical formulation is used to estimate the ultimate strength of the changed continuously welded stiffened plate under uniaxial compression. The results are in good agreement with the FEA results by Khedmati et al.

Highlights Effect of longitudinal shear force at the junction line between the plate and the stiffener of a continuously welded stiffened plate is investigated. A model with welded and non-welded spans is proposed to calculate Euler limit load of an intermittently welded stiffened plate. Changing an intermittently welded stiffened plate into a continuously welded one, ultimate strength of the equivalent continuously welded stiffened plate is estimated.