| This thesis presents the results of a study involving the ultimate and post-peak capacity of composite steel-concrete ice resisting walls subjected to transverse and longitudinal loadings. The main application of these composite walls lies in the design of arctic offshore structures subjected to large forces from moving sea ice.; Current design provisions in the Canadian fixed concrete offshore code (CSA S473-M89) require the computation of the ultimate capacity of the wall for strength, and the wall energy absorption (post-peak) characteristics. Currently, several methods exist for computation of the wall ultimate strength. However, nearly all approaches require an estimate of the concrete effectiveness factor, which is not readily available. In addition, no successful method has been derived which addresses the problem of post-peak behavior.; In this study, the finite element method is used to determine both ultimate strength and post-peak capacity of a selected composite wall system. Material nonlinearities in the concrete and steel are considered, and the frictional interface between steel and concrete is modelled. Numerical results are compared with those obtained from experiment for a variety of wall geometries and loading configurations. |
