Time-Step Calculation

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

Structure model
Structure model

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.

Acting horizontal acceleration
Acting horizontal acceleration

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.

Progression of the bending moment at a support location
Progression of the bending moment at a support location
System deformation
System deformation
Animation of the 1st eigenmode
Animation of the 1st eigenmode