Seismic Dead Weight of Structures, discussion requested
Seismic Dead Weight of Structures, discussion requested
(OP)
Pals
Seismic Dead weight usually means
1)Design dead wt of structural and nonstructural components
2)some percent of live load
Seismic energy intake depends on this value so much.
But here is an important point from dynamics:
- Seismic energy intake depends on weight that take part fully in earthquake excitation.
one of my concern is thus, shouldnt this weight consider only floor loads, since it is a floor that accelerates with quake excitation in a typical building?
Why should I include weight of vertical elements?
respects
IJR
Seismic Dead weight usually means
1)Design dead wt of structural and nonstructural components
2)some percent of live load
Seismic energy intake depends on this value so much.
But here is an important point from dynamics:
- Seismic energy intake depends on weight that take part fully in earthquake excitation.
one of my concern is thus, shouldnt this weight consider only floor loads, since it is a floor that accelerates with quake excitation in a typical building?
Why should I include weight of vertical elements?
respects
IJR





RE: Seismic Dead Weight of Structures, discussion requested
Likewise, when the building moves, the building's contents (live load) also tend to remain stationary because of inertia. However the contents are usually not tied to the structure, or if they are, not very well. As a result, the contents are free "rattle around" inside without really overstressing anything.
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RE: Seismic Dead Weight of Structures, discussion requested
RE: Seismic Dead Weight of Structures, discussion requested
What about the weight of columns and shear walls?
respects
IJR
RE: Seismic Dead Weight of Structures, discussion requested
RE: Seismic Dead Weight of Structures, discussion requested
For shear walls, I consider the weight of the walls perpendicular to the load direction separately and add them to the floor seismic load. Once the seismic load has been distributed to the seismic force resisting elements, I put the weight of the walls parallel to the load direction at the center of wall in addition to the seismic load applied at the floor level. This is for heavy concrete walls only.
I'm not sure if I am making this clear... writing from home... be back next week.