Hi,
Apparently, the pushover analysis in Robot is performed through increments of displacement of the control node up to the stipulated limit.
However, in EC8-1 seismic analysis it is required to apply lateral forces at the floor level corresponding to a uniform distribution depending on the floor mass and another modal distribution according to the first vibration mode.
The expectation is to obtain capacity curves like the one shown below, obtained in OpenSees:
But what I get in Robot are two identical curves, with the same displacement increments:
Inputs:
The other issue involved is the consideration of the gravitational actions involved in the seismic combination, are they being considered in the pushover analysis? And how can gravity loads be considered together with pushover analysis to design the elements for the required performance level?
Thanks...
