Transverse Shear Stiffness of Steel Sandwich Beam with Bi-directional Corrugated-strip Core

摘要

This paper presents an alternative design of structural core sandwich beam in which the novel core named the bi-di rectional corrugated-strip core is presented The proposed core consists of a series of corrugatedstrip plates ar ranged in bi-directional pattern. This paper also aims to present a simplified analytical method to address the effi ciency in transverse shear stiffness of the proposed sandwich beam. Based on the force-distortion relationship con cept, the unit cell approach and the modified stiffness matrix are used to derive the transverse shear stiffness. The proposed analytical method is validated with the analytical solution of truss core sandwich beam and finite element solution of sandwich beam with proposed core. The presented analytical model is then used to assess the perform ance of a sandwich beam with bi-directional corrugated-strip core. Compared with truss core sandwich beam, the transverse shear stiffness per unit weight of core of bi-directional corrugated-strip core sandwich beam is significant ly higher in some specific configurations.