How ideCAD defines the seismic design category, according to ASCE 7-16?
Seismic design categories of buildings are determined automatically according to Table 11.6-1 and 11.6-2, depending on the SDS and SD1 parameters defined in 11.5 and the risk category.
SYMBOLS
SD1 = Long-period design spectral response acceleration parameter for 1 s
SDS = Short-period design spectral response acceleration parameter
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The Seismic design category is determined automatically based on the short-period design spectral response acceleration parameter and long-period design spectral response acceleration parameter defined in 11.4.5, with risk category by ideCAD software.
|
SDS |
I or II or III |
IV |
|---|---|---|
|
SDS < 0.167 |
A |
A |
|
0.167 ≤ SDS < 0.33 |
B |
C |
|
0.33 ≤ SDS < 0.50 |
C |
D |
|
0.50 ≤ SDS |
D |
D |
|
SD1 |
I or II or III |
IV |
|---|---|---|
|
SDS < 0.067 |
A |
A |
|
0.067 ≤ SDS < 0.133 |
B |
C |
|
0.133 ≤ SDS < 0.20 |
C |
D |
|
0.20 ≤ SDS |
D |
D |
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