Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation 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
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
Organization (S):
EDF-R & D/AMA, CS IF
Manual of Validation
V8.01 booklet: Fluid
Document: V8.01.112
FDLV112 - Calculation 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 modelize the movement of drive of this reserve due
with the seismic excitation.
Calculation is linear, transitory on modal basis.
Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation 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
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
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
Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation 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
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
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 locks 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: Acceleration in X
Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ
Key
:
V8.01.112-A
Page:
4/6
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
Appear 1.3-b: Acceleration in Y
Appear 1.3-c: Acceleration in Z
Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation of stopping with reserve under seismic stress
Date:
23/06/03
Author (S):
G. DEVESA, D. NUNEZ
Key
:
V8.01.112-A
Page:
5/6
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
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/s
2
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
Code_Aster
®
Version
6.4
Titrate:
FDLV112 - Calculation 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
Manual of Validation
V8.01 booklet: Fluid
HT-66/03/008/A
3 Modeling
With
3.1
Characteristics of modeling
Modeling A relates to the incompressible fluids with added masses. One thus does not modelize
that the water stopping and not reserve. The latter is taken into account only in
macro-control
MACRO_MATR_AJOU
.
3.2
Characteristics of the mesh
The mesh includes/understands 80 meshs of the type PENTA15 and 696 meshs of the type HEXA20.
The stopping is modelized in 3D.
3.3
Functionalities tested
Controls
MACRO_MATR_AJOU MASS_AJOU
FORC_AJOU
4
Results of modeling A
4.1 Values
tested
Identification Reference (m/s
2
)
Aster (m/s
2
) 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.