Principle of Superposition
Over the years, I have developed a structured approach to organizing the structural design process. This methodology is designed to enhance the understanding of a structure and, consequently, streamline Analysis Workflows. It fundamentally integrates the language of Eurocodes throughout the process.
The guiding principle is that a structure can be understood as an overlay of various structural systems. Each system consists of specific structural elements and is associated with particular loading conditions. In linear analysis, these systems can be studied independently, which provides a clear framework for organizing Analysis Workflows.
While this approach is tailored for linear analysis, it also accommodates nonlinear effects by analyzing the interactions between different structural systems.
Structural elements may belong to multiple systems, and in the context of Eurocodes, load combinations are handled by considering the interactions between these systems.
Eurocodes
- EN 1991-1-1 [1.4.4] structural elements
Structural elements comprise the primary structural frame and supporting structures. For bridges, structural elements comprise girders, structural slabs and elements providing support such as cable stays.
- EN 1991-1-1 [1.4.5] non structural elements
Non structural elements are those that include completion and finishing elements connected with the structure, including road surfacing and non-structural parapets. They also include services and machinery fixed permanently to, or within, the structure
Structural system refers to the load-resisting sub-system of a building. The structural system transfers loads through interconnected elements or structural members.
Structural systems are here identified as they are associated to specific loading. As such they are associated to specific designs, modelling, calculations and quality control.
Analysis Workflow Real Example
