Principal Stress Behaviour Of A Steel Plate Shear Wall Concerning Buckling Modes
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P. Memarzadeh, M. Azhari & M. M. Saadatpour
When buckling occurs in the infill plate of a steel plate shear wall (SPSW), a diagonal tension field is formed through the plate. This paper investigates the influence of torsional stiffness of surrounding members (i.e. beams and columns) on the buckling coefficient and tension field behaviour of SPSW. The linear buckling equations in the sense of von-Karman have been solved in conjunction with various boundary conditions, by using the Ritz method. Also, in this research the effects of symmetric and anti-symmetric buckling modes on the behaviour of the tension field and buckling coefficient have been studied. Keywords: steel shear wall, thin plate, shear buckling, symmetric, antisymmetric, Ritz method, principal stresses. 1 Introduction The steel plate shear wall is a lateral load resisting system consisting of an infill plate located within a frame. While performing experimental investigations on the thin aluminum shear panels of an aircraft, Wagner found out that in thinwebbed structures with stiff boundary members a diagonal tension field would be formed when buckling occurs. Then Wagner  developed the pure tension theory stating that the formation of the tension field is the primary mechanism for shear resistant. The incomplete tension field theory was later presented by Kuhn et al. . On the basis of Kuhn’s theory the shear resistance capacity is a combination of pure shear and inclined tension field. Design engineers require the ability to assess inelastic structural response using conventional analysis software that is commonly available. An analytical model—termed the strip model—was developed by Thorburn et al.  to simulate the tension field behaviour, wherein the infill plate is modelled as a
steel shear wall, thin plate, shear buckling, symmetric, antisymmetric, Ritz method, principal stresses.