I am learning from Example7 of the EXAMPLES file . In the file Ex7.Frame3D.analyze.Dynamic.sine.Uniform.tcl , I can run the file ,but I have a question on it. In the sine wave definition, the Duration of it is 3 seconds, BUT the ground motion analysis parameters defines maximum duration of ground-motion analysis to be 10 seconds. Indeed, the analyze command executes 10 seconds analysis , but how can the execution be performed in the last 7 seconds , with there's no sine wave keeping on?Or there's no direct relations between them?
thanks in advance.
are you under the impression that say a building stops shaking the moment an earthquake stops! .. of course the structure will keep moving after the sine wave ends, it is called free vibration.