Lets say you have a square spread footing with a column with a small moment and large axial load such that the entire surface under the footing is pushing up on the footing (i.e. e<B/6), and the gravity load in this case is only due to the superstructure (not the footing or soil self weight)...
I have some questions for moments on spread footings:
1- Lets say overturning moment is present, but the dead load (including footing and soil self weights) is large enough such that there is always compression on the soil below the footing for the entire footing area. Putting the net pressure...
CSA O86:19 recommends aspect ratios for CLT shear walls to be between 2 and 4 to promote rocking instead of sliding.
If I have a 4m storey height, the wall lengths must be between 1m and 2m long to meet the aspect ratio requirements.
Now say the panel sizes are all 2m wide (still 4m tall). Am...
I'm working on an unsupported single angle in bending, and I understand the bending moments about the geometric axis need to be resolved in bending moments about the principal axis.
At this wiki link, there are equations provided to transform a point due to rotation, which is straightforward...
phamENG understood, what I think I was missing is that since the diaphragm is statically indeterminant (3 supports), the beam stiffness impacts the support reactions, and therefore the beam stiffness must be accurate. So b) would be semi-rigid diaphragm.
A rigid diaphragm would mean that the...
SJBombero that is my understanding as well. In option b) if the beam is just any random beam, and does not necessarily replicate the actual diaphragm stiffness, is this ever a recommended model to find the direct shears?
Lets say we have a 2-bay diaphragm width (two wide in E-W direction), shear walls at each grid (3 total) and a seismic force in the N-S direction. In a flexible diaphragm, the diaphragm acts as a deep beam with fully rigid supports. So the end walls take approx. 25% of the load and the middle...
I have a simply support wide flange beam supporting a slab. The beam needs rotational restraint at the supports as usual, which in this case is at wall plates into a column. However, due to an existing concrete capital a double angle connection into a wall plate will take up less than half of...
For some reason the "Slab rebar objects" line is not available under the model explorer in SAFE 20.3 (attached). I'm therefore not able to look at all of the different rebar objects in the model.
Is there is a setting that can add this item back to the...
I'm trying to figure out why the draw tendons option is not available in the "draw" drop down menu in SAFE (attached). According to the CSI SAFE PT design manual there should be a draw option for tendons.
Not sure what I'm missing here...
