Cyclic pushover analysis may be performed using either of two approaches, outlined as follows:
This page describes possible approaches for performing cyclic pushover analysis.
| On this page |
|---|
Sequence of nonlinear-static load cases
Cyclic pushover analysis can be carried out by performing may be performed through a sequence of chained pushover analyses. Two key aspects of this approach are provided belowinclude:
- Each pushover analysis would be pushing the structure in the direction opposite direction when compared to that of the push direction for the immediately preceding pushover load case.
- Each pushover load case, except for aside from the first one, would be using use stiffness at the end of the previous pushover load case.
Time-history load
...
cases
Another An alternate approach is to use a single nonlinear time-history load case.
However, Some special considerations are necessary when using a time-history load case requires some special considerations to model that the applied loads applied loading, listed as follows:
- Load should be scaled up
...
- or down
...
- to achieve the
...
- monitored pushover displacement desired for each cycle.
- The time function
...
- should consist of linear segments
...
- which apply the loads in one direction and then
...
- the reverse, possibly with a constant segment to
...
- hold
...
- loads before
...
- their reverse.
- For each cycle in the sequence, the peak positive and negative
...
- time
...
- -function values must be found, starting with the first cycle of load application.
A sample of a Sample time function is shown in the figure belowFigure 1:
Figure 1 - Cyclic time function