Stiffness matrix of thin-walled curved beam for spatially coupled stability analysis

摘要: Abstract The exact stiffness matrix for the spatially coupled stability analysis of thin-walled curved beam with non-symmetric cross-section subjected to uniform compression is newly presented. For this, elastic strain energy including axially/flexurally/torsionally terms and potential due initial stress resultant are introduced. Then, equilibrium equations force–deformation relationship derived from principle explicit expressions displacement parameters based on power series expansions components. Next, element determined using relationships. In order verify accuracy this study, numerical solutions presented compared finite Hermitian elements. addition, coupling symmetric anti-symmetric modes at buckling load crossover change in curvature investigated.