Abstract
This paper formulates the stiffness matrix and a procedure for the analysis of a general class of sandwich beam and frame structures subjected to arbitrary loading and boundary conditions. The computed solutions for both deflections and stresses are exact in the sense that they satisfy the governing differential equation, all boundary conditions, and interelement compatibility. Explicit expressions are given for the formulation of the stiffness matrix, and of the fixedend forces for common loading conditions. The theory is applicable to sandwich construction of both thick and thin facings, with or without edge reinforcement. Preliminary study of the behavior of sandwich beams using the developed theory shows that the Saint Venant principle may not apply to sandwich beams regarding the effects of applied end moments. Restraint against shear deformations will generally reduce deflections and shear stresses in the core, but tend to increase stresses in the facings. Quantitative assessment of these and other ...
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