Page 27 - Analysis and Design of Energy Geostructures

xxviii List of symbols

Greek symbols
Symbol Variable name Unit measure
α Linear thermal expansion coefficient 1/ C; με/ C

Thermal expansion coefficient of concrete 1/ C; με/ C

α c
Coefficient considering long-term effects on the compressive strength of
α cc
concrete
Coefficient considering long-term effects on the tensile strength of
α ct
concrete
2
Thermal diffusivity m /s
α d
2
Thermal diffusivity of the fluid m /s
α d;f
2
Thermal diffusivity of the soil m /s
α d;soil
2
Thermal diffusivity of the energy pile m /s
α d;EP

Equivalent linear thermal expansion coefficient 1/ C; με/ C
α eq
Rheological coefficient
α r

Linear thermal expansion coefficient of soil 1/ C; με/ C

α soil

Linear thermal expansion coefficient of soil at the level of pile base 1/ C; με/ C

α soil;b

Linear thermal expansion coefficient of soil around the pile shaft 1/ C; με/ C

α soil;s

Linear thermal expansion coefficient of wire 1/ C; με/ C

α wire
Modular ratio
α E
Linear thermal expansion coefficient of pile 1/ C; με/ C

α EP
Dilatancy rule parameter
α h
Surface absorptivity
α irr

α 0 ;α 1 ; α 2 Material constants 1/ C
Adhesion factor
f
a
Empirical constants
β 0 ; β 1
Material parameter
β H
Plastic rigidity
β p
Thermal expansion coefficient vector 1/ C; με/ C

β kl

Volumetric thermal expansion coefficient 1/ C; με/ C
β; β j

Volumetric thermal expansion coefficient of water 1/ C; με/ C
β w
Angle between plastic strain increment vector and normal to the yield degrees
β yy
surface
β ~ Ratio of the distance of the centre of compression from the compression
face to the neutral axis depth
Shear factor
β
β f Beta factor
γ Unit weight kN/m 3
ς 1 ; ς 2 Material parameters
Factors for unfavourable permanent actions
ς i
γ 0 Buoyant unit weight N/m 3
γ Saturated unit weight N/m 3
γ sat Dry unit weight N/m 3
γ d Unit weight of solid particles N/m 3
γ s Partial factor for design action effect
γ ; γ ; γ ; γ Partial resistance factors
Sd
b s t s;t
γ Engineering shear strains
γ kl Unit weight of water
γ w Partial factor for steel
γ r Partial factor for effect of actions; Euler constant
γ E Partial factor for actions
γ F Partial factor for permanent action or permanent action effects
G