2. Types of elastic instability
When loading a structure – it will often be an elastic – structural element, and its behavior can be examined by means of a load-displacement diagram. The load is obviously that applied to the structure. The displacement is the displacement of a reference point, chosen a priori as arbitrary. In practice, this point is chosen because a significant displacement value is expected there.
When the load is applied in an increasing manner from a zero value, the load-displacement relationship described constitutes an equilibrium trajectory. The instability of the structure corresponds to the transition, on this trajectory, between the respectively stable and unstable equilibrium configurations. This instability occurs through the appearance of :
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Types of elastic instability
Structural elements, ideal and real
References
Standards and norms
- European Committee for Standardization – CEN, Eurocode 3: Design of steel structures – Part 1-1: General rules and rules for buildings. - EN 1993-1-1 - 2005
- European Committee for Standardization – CEN, Eurocode 3: Design of steel structures – Part 1-5; Flat plates. - EN 1993-1-5 - 2005
- European Committee for Standardization – CEN, Eurocode 4: Design of steel-concrete composite structures – Part 1-1:...
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