Static, free vibration and buckling analyses of stiffened plates by CS-FEM-DSG3 using triangular elements

•CS-DSG3 is extended for analyses of eccentrically stiffened plates.•Original CS-DSG3 is combined with a membrane member and a thick beam element.•Eccentricity between the plate and the beam is included in the formulation.•Compatibility of deflection and rotations of stiffeners and plate is assumed.•Accuracy and reliability of the proposed method is verified.

The paper presents the static, free vibration and buckling analyses of eccentrically stiffened plates by the cell-based smoothed discrete shear gap method (CS-FEM-DSG3) using triangular elements. In this method, the original plate element CS-DSG3 is combined with a membrane element and stiffened by a thick beam element. The eccentricity between the plate and the beam is included in the formulation of the beam. The compatibility of deflection and rotations of stiffeners and plate is assumed at the contact positions. The accuracy and reliability of the proposed method is verified by comparing its numerical solutions with those of analytical solutions, experimental results and others available numerical results.