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Vertical seismic load effect is determined automatically according to 14.4.2.2. |
Symbols
SDS = Short period design spectral acceleration coefficient
Sav = Design vertical response spectral acceleration
D = Dead load
Ev = Vertical seismic load
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Vertical Seismic Load Effect
The vertical seismic load effect, Ev, is determined in according to Eq. (12.4-4a) for buildings which that are seismic design category categories A and B.
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The vertical seismic load effect, Ev, is determined in according to Eq. (12.4-4b) for buildings which that are seismic design category categories C, D, E and F.
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The vertical seismic load effect can be taken as zero for either of the following conditions:
Structures assigned to Seismic Design Category B.
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In Eq. (12.4-2), where determining demands on the
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soil–structure interface of foundations.
Mathinline body $$ \normalsize E=E_h-E_v \qquad \qquad \qquad (12.4-2) $$
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