Seismic load on basement
Seismic load on basement
(OP)
Single story with a basement. 40'x120'. Masonry shear walls and concrete basement walls. IBC 09, SDC=B.
The question I have is about the basement level. Are there any special provisions to determine the seismic force on the basement level or is its similar to a level about grade? Do I need to consider some weight of the soil as seismic weight?
The question I have is about the basement level. Are there any special provisions to determine the seismic force on the basement level or is its similar to a level about grade? Do I need to consider some weight of the soil as seismic weight?






RE: Seismic load on basement
The only time anyone checks parts of basements walls is if they have large or significant amounts of windows. The compressive strut action means that normal basements work by inspection.
RE: Seismic load on basement
If you are dealing with out of plane seismic loads it is likely you'll be permitted higher compressive strengths in your masonry owing to cyclical loading, but most engineers reduce/remove the added capacity due to the axial load on the wall. It is typic
RE: Seismic load on basement
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Qshake
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RE: Seismic load on basement
Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis
http://www.engissol.com/cross-section-analysis-des...
RE: Seismic load on basement
RE: Seismic load on basement
I found this article in StructureMag
http://www.structuremag.org/article.aspx?articleID...
I think I am going to assume my base at grade level. I'll design the masnory shear walls for shear due to roof and perpendicular walls (half the height). But what about the floor which is precast floor planks. Wouldn't this floor+basement walls (perpendicular to direction) generate some seismic loads? Shouldn't I design the basement walls to resist these shears?
RE: Seismic load on basement
Check your code to see if you need to do a seismic retaining wall design for our of plane loads.
RE: Seismic load on basement
Seismic wall pressures (Sec. 1802.2.7)
– SDC ≥ D
– For design purposes treat these loads as “E” not “H"
From: http://seabc.ca/documents/seminars/ASCE_SEI_7_05.p... - Bottom of page 6.