Dynamic Behavior of Concrete: Constitutive Models - Dynamic Behavior of Concrete and Seismic Engineering - page 86

- Model data:

i) volume-pressure relationship, state equation;

U

elastic field: PK P with P 1 [2.54]

elastic

U

0

transition field: P ª 1 F K F K P º [2.55]

¬ ¼

elastic 1

“The Hugoniot's upper part”:

PP

2 3

lock
lock

PK with P K P K P P

[2.56]

1 2 3

1 P

ii) plasticity threshold

f given by the effective stress:

, İ , D

V

ª

N

º

V AD 1 P Cn 1 1 H V

[2.57]

¬ ¼

f

,

c

Figure 2.22 illustrates the different terms of the formulation.