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Time Step Integration on a Frame Construction

The calculation for an actual earthquake (El Centro, 1940) is demonstrated based on the following frame construction.

Frame construction

The acceleration spectrum that was recorded back then is transferred to the system, and a time step integration with 800 steps per 0.05 seconds is calculated.

Acceleration spectrum, El Centro earthquake

After the calculation, the deformation, velocity, and acceleration as well as all internal forces of the system are available for each time step.
These values can be visualized or e.g. used for a reinforced concrete design.

Bending moment curve over time

Progression of the bending moment at a support location

Deformed system

System deformation

Load the animation of the 1st eigenmode (294 KB).