response history analysis of an elastic coupled wall
In this page, we perform eigen analysis and response history analysis of an elastic coupled wall model.
The wall model is a simplified version of the example shown in section 7.2 of this paper: 10.1016/j.engstruct.2020.110760.
The model can be downloaded.
Model Brief
The geometry is summarized in the following figure.
Definitions of nodes, elements, materials, boundary conditions are stored in node.supan
and element.supan
. Use proper commands to load files.
Eigen Analysis
Before performing the eigen analysis, the system is double-checked to be symmetric. In fact, as eigen analysis is normally conducted on elastic structures, which are most likely to be symmetric, it is in general not problematic as long as elasto-plastic behavior is not involved.
Now we define a Frequency
step to compute ten eigenvalues of the generalized eigen problem.
Invoke analysis and check the eigenvalues.
The output is shown as follows.
Thus, the period of the first mode can be computed as
Response History Analysis
Ground Motion
After downloading the processed recording file, the following command can be used to define the amplitude.
Damping Model
Other Settings
Some Stats
Result
We show roof displacement history to close this example.
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