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Soil Bearing Distribution Under Shear Wall
- Thread starter ridgeline
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If this wall is part of building structure, you should analysis with the building framing to get bearing from lateral loads.
If it is a self-standing wall, well, not likely (what to bear?), but it is a situation like retaining wall.
If it is a self-standing wall, well, not likely (what to bear?), but it is a situation like retaining wall.
- Thread starter
- #3
The wall is 40' long 20' high and consists of two 15' shear panels on either end separated by a 10' long 10' high opening in the middle. I have calculated a 10 kip lateral load acting on the entire wall or 5 kips per panel. First of all, do I analyze the entire 40' wall or look at each 15' segment when trying to determine the soil reactions. Secondly, I imagine the soil reaction will be some triangular shape but how do I determine where it acts. I came across an example for a laterally loaded column using an eccentricity, e=M/P, in order to locate the location of the resultant. Does this also work for a shear wall? Any help would be greatly appreciated. Thanks.
The conservative way to handle this is: distribute the base shear to the shear walls. Then for each wall analyze its base pressure by M = V*h (height of wall), e = M/P,
S (stress) = P/A*(1 +/- 6*e/L). A=b (footing width)*L (Length).
If the entire footing is in compression, you are home free. If it's heel is in tension, you can reiterate the process with L'=L-length in tension until the tension is gone. Or, you may want to utilize the weight from the tension side tranverse wall. It is more realistic, but I wouldn't get to depth on that, because there are other factors need to be looked into.
S (stress) = P/A*(1 +/- 6*e/L). A=b (footing width)*L (Length).
If the entire footing is in compression, you are home free. If it's heel is in tension, you can reiterate the process with L'=L-length in tension until the tension is gone. Or, you may want to utilize the weight from the tension side tranverse wall. It is more realistic, but I wouldn't get to depth on that, because there are other factors need to be looked into.
- Thread starter
- #5
Would you have to analyze each panel individually or could you analyze the entire wall as a whole since they share the same continuous footing?
The bearing pressures come out much higher when you analyze them individually - Could this process be too conservative? Would analyzing the entire wall be conservative enough?
The bearing pressures come out much higher when you analyze them individually - Could this process be too conservative? Would analyzing the entire wall be conservative enough?
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