Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
1/6

Organization (S): EDF-R & D/AMA, CS IF
Handbook of Validation
V8.01 booklet: Fluid
Document: V8.01.112

FDLV112 - Calcul of stopping with reserve under
seismic stress

Summary:

The goal of this case test is to validate the functionalities of calculation coupled fluid-structure of stopping with reserve
under seismic stress by taking of account the assumption of incompressibility, therefore of mass added for
reserve like that of forces added to model the movement of drive of this reserve due
with the seismic excitation.
Calculation is linear, transitory on modal basis.

Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
2/6

1
Problem of reference

1.1 Geometry

The geometry consists of 2 subsets: the arch dam [Figure 1.1-a] and reserve
[Figure 1.1-b].

Appear 1.1-a: Arch dam

Appear 1.1-b: Selected
Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
3/6

1.2
Properties of materials

The stopping consists of concrete:

E 36000
MPa

0.2

2400 kg/m3

Reserve consists of water (= 1000 kg/m3)

1.3
Boundary conditions and loadings mechanical

One blocks the N130 node at the base of the stopping and one imposes on the group of nodes BARFOND, which
constitute the bottom of the stopping in contact with the foundation, a uniform displacement in all them
directions. The N130 node interdependent of all group BARFOND is subjected to a seismic excitation
in the 3 directions of space. The 3 accélérogrammes are represented on the figures
[Figure 1.3-a], [Figure 1.3-b], [Figure 1.3-c] below.


Appear 1.3-a: Accélération in X
Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
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Appear 1.3-b: Accélération in Y


Appear 1.3-c: Acceleration in Z
Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
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2
Reference solution

2.1
Method of calculation used for the reference solution

The data of this test are draw from a general study implementing the functionalities from
Code_Aster to deal with the problems of seismic analysis of the concrete dams [bib1]. Results
obtained were confronted with those obtained with software EACD dedicated to this kind of calculation.
However, there no were precise statements of value with this software. This is why one directs oneself towards
a numerical solution and results of nonregression obtained exclusively with
Code_Aster.

2.2
Results of reference

One tests in m/s2 maximum acceleration according to the 3 directions and the spectrum of response of oscillator
corresponding (SRO) for a damping of 5% to the N1909 node, medium of the higher edge of
stopping.

2.3
Uncertainty on the solution

Numerical solution.

2.4 References
bibliographical

[1]
E. CHAMPAIN: “Seismic Analysis of the concrete dams with Code_Aster” -
NT HT-62/01/023/B
Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

Code_Aster ®
Version
6.4
Titrate:
FDLV112 - Calcul of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ Key
:
V8.01.112-A Page:
6/6

3 Modeling
With

3.1
Characteristics of modeling

Modeling A relates to the incompressible fluids with added masses. One thus does not model
that the water stopping and not reserve. The latter is taken into account only in
macro-command MACRO_MATR_AJOU.

3.2
Characteristics of the grid

The grid includes/understands 80 meshs of the type PENTA15 and 696 meshs of the type HEXA20.
The stopping is modelled in 3D.

3.3
Functionalities tested

Commands
MACRO_MATR_AJOU MASS_AJOU
FORC_AJOU

4
Results of modeling A

4.1 Values
tested

Identification Reference (m/s2)
Aster (m/s2) Difference
ACCEX (T = 1.0 S)
5.85886 5.85886 0
SROX (F = 9.0 Hz)
17.6053 17.6053 0
ACCEY (T = 1.0 S)
2.80757 2.80757 0
SROY (F = 9.0 Hz)
9.7625 9.7625 0
ACCEZ (T = 1.02 S)
­ 0.77467 ­ 0.77467 0
SROZ (F = 17.4 Hz)
3.81459 3.81459 0

5
Summary of the results

The results obtained were confronted with those obtained with software EACD dedicated to this kind of
calculation. Although there no were precise statements of value with this software, the study [bib1] concluded with
a good agreement with Code_Aster. However, one refers in this test with results of
not regression obtained exclusively with Code_Aster.
Handbook of Validation
V8.01 booklet: Fluid
HT-66/03/008/A

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