Nonlinear Structural Analysis

This category of Nonlinearity refers to the possibility that the points where the structure is fastened, may move, deflect or rotate. Where most structures are fastened to the soil or rock through embedment or other fasteners, it would be rare that this aspect of Nonlinearity would need to be considered for aerial structures used in Transmission and Distribution lines. This is based on the assumption that the foundation for the structure has been designed to be adequate to support the assumed loads that the structure requires and that the possibilities of foundation movement (e.g. washouts) have been considered.

To name the most common scenarios, this effect can occur in areas of discontinuous permafrost, areas prone to mudslides and in many earthquake situations where some soils tend to liquify.