Page 214 - Analysis and Design of Energy Geostructures

Deformation in the context of energy geostructures 187

4.10.10 Constitutive modelling of materials involved with energy
geostructures

In the context of the modelling of the mechanical behaviour of materials for the anal-
ysis and design of energy geostructures, the reinforced concrete that often characterises
such structures can be described in most situations as linear thermoelastic. In contrast,
the mechanical behaviour of the soil and rock surrounding energy geostructures is
often described as either (1) thermoelastic, (2) thermoelastic, perfectly plastic, (3) ther-
moelastic, plastic with hardening or (4) thermoelastic, thermoplastic with hardening.
Linear or nonlinear stress strain relations are employed for the previous purpose, and
the choice of accounting for plasticity depends on factors such as the stress state and
the stress history characterising the modelled materials.

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