3. B modeling#
This modeling validates the use of an initial prestress state with the EPX LCAB GLIS link.
3.1. Boundary conditions and loads#
The 6 knots at each end of the concrete are embedded.
In addition, the model is assigned a loading of the prestress type calculated from DEFI_CABLE_BP and CALC_PRECONT. The voltage imposed on the cable is defined by the TENSION_INIT keyword from DEFI_CABLE_BP, its value is set to \(2.E5N\). This load is sent to EPX in the form of an initial state.
3.2. Details#
In EPX, prestress is applied without additional loading. When this prestressed state was calculated by CALC_PRECONT, the kinematic relationships between cable and concrete were total (i.e. in the three directions of space). For this test, when we arrive in EPX, we will have sliding links.
Despite this, we still test that the system is in balance when arriving from EPX. In fact, the stress profile calculated in DEFI_CABLE_BPest is done with zero friction coefficients. The constraint is therefore equal on all the cells. Once in EPX, although the links are relaxed at each node in the direction tangent to the cable, the nodes do not move because of this uniform stress profile.
To test this balance, we carry out numerous steps of time and we check on a few values that nothing has changed.
Rq: we verified that by calculating a tension profile with friction the cable moved along its trajectory in EPX.
3.3. Tested sizes and results#
These tests have a reference ANALYTIQUE given the status of the system at the output of CALC_PRECONT.
Node |
Component |
Moment (s) |
Reference Value (m) |
Tolerance |
\(\mathit{NY10}\) |
|
0.01 |
|
|
\(\mathit{NY10}\) |
|
0.01 |
|
|
Mesh |
PG |
Component |
Component |
Instant (s) |
Reference Value (m) |
Tolerance |
\(\mathit{MY10}\) |
1 |
|
0.01 |
|
|
|
\(\mathit{MCAY10}\) |
1 |
|
0.01 |
|
|