SAP2000 SAP2000 Web Tutorial 1

Figure D-3: Static Pushover Case Data Dialog Box
adequate in most cases. If the minimum number of steps saved is too small, you may
not have enough points to adequately represent the pushover curve. If the minimum
and maximum number of saved steps is too large, then the analysis may consume a
considerable amount of disk space, and it may take an excessive amount of time to
display results.
The program automatically determines the spacing of pushover steps to be saved as
follows. The maximum step length is equal to total force goal or total displacement
goal divided by the specified Minimum Saved Steps. The program starts by saving
steps at this increment. If a significant event occurs at a step length less than this
increment, then the program will save the step too and pick up with the maximum
increment from there. For example, suppose the Minimum Saved Steps and
Maximum Saved Steps are set at 20 and 30 respectively, and the pushover is to be to
a displacement of 10 inches. The maximum increment of saved steps will be 10 / 20 =
0.5 inches. Thus, data is saved at 0.5, 1, 1.5, 2, 2.5 inches. Suppose that a significant
event occurs at 2.7 inches. Then data is also saved at 2.7 inches, and continues on
from there being saved at 3.2, 3.7, 4.2, 4.7, 5.2, 5.7, 6.2, 6.7, 7.2, 7.7, 8.2, 8.7, 9.2, 9.7
and 10.0 inches.
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