WoodDesignCat
Civil/Environmental
- May 26, 2016
- 32
Hi all,
I'm designing a building for dry flood proofing and need to design concrete walls for breaking wave loads.
1. Pmax and Ft do not need to be applied simultaneously correct? My understanding is that Pmax is maximum PSF, of the distributed loads used to create Ft. If you look at the attached picture, the 1.2γwds would be the static pressure in PSF where the dynamic pressure is at a maximum in the diagram. The 2.4γwds^2 would be the total force of that hydrostatic triangular load, (γw(2.2ds)^2 )/ 2=2.44γw ds^2.
2. Does a normal hydrostatic load need to be applied at the same time as the breaking wave static force? In the text it refers to it as "static wave pressure", but in the diagram it refers to it as "Hydrostatic Pressure". I assume it doesn't need to be applied at the same time as the normal hydrostatic pressure, because it doesn't appear to be any different than a hydrostatic pressure, it is just applied from the top of the wave height.
3. Do I need to apply hydrodynamic loads at the same time as the breaking wave loads? I was going to do apply both of them for wall strength calculations, but wasn't sure if I really should be doing this or not. When checking the overall building sliding resistance I was planning on only looking at the hydrodynamic force, and not the breaking wave force.
Also a follow up concern. The building needs to be waterproofed to BFE + 1', but according to these diagrams/equations to calculate ds, the crest of reflected waves goes above that height. This seems like an issue...
I'm designing a building for dry flood proofing and need to design concrete walls for breaking wave loads.
1. Pmax and Ft do not need to be applied simultaneously correct? My understanding is that Pmax is maximum PSF, of the distributed loads used to create Ft. If you look at the attached picture, the 1.2γwds would be the static pressure in PSF where the dynamic pressure is at a maximum in the diagram. The 2.4γwds^2 would be the total force of that hydrostatic triangular load, (γw(2.2ds)^2 )/ 2=2.44γw ds^2.
2. Does a normal hydrostatic load need to be applied at the same time as the breaking wave static force? In the text it refers to it as "static wave pressure", but in the diagram it refers to it as "Hydrostatic Pressure". I assume it doesn't need to be applied at the same time as the normal hydrostatic pressure, because it doesn't appear to be any different than a hydrostatic pressure, it is just applied from the top of the wave height.
3. Do I need to apply hydrodynamic loads at the same time as the breaking wave loads? I was going to do apply both of them for wall strength calculations, but wasn't sure if I really should be doing this or not. When checking the overall building sliding resistance I was planning on only looking at the hydrodynamic force, and not the breaking wave force.
Also a follow up concern. The building needs to be waterproofed to BFE + 1', but according to these diagrams/equations to calculate ds, the crest of reflected waves goes above that height. This seems like an issue...
![[idea]](/data/assets/smilies/idea.gif "[idea] [idea]")
![[r2d2]](/data/assets/smilies/r2d2.gif "[r2d2] [r2d2]")
