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The efforts generated by the spectrum in the structure are absolute values, which cannot be combined with gravitational loads (which have a sign convention according to the direction of the force). How can you give a sign to the forces generated by the spectrum and be able to combine them with gravitational charges and so on?
Informative video but I have 2 doubts. 1. Why 2xP/(effective area) 2. In SAFE, the moment is applied along Y so it is actually MY which is about X, am I correct here?
If we want to take reaction from staad and footing design in safe then what modifications needs to be done during importing time? Better to have one video plz if possible
In case of column on property line the axial force eccentricity causes large BM on footing causing tension on one side, as you say can I design the footing till not more than 25% area of footing is in contact with soil.Does the footing SBC condition for service load should be satisfied or the SBC value can be relaxed by considering 1.5 safety factor as compared to 3 which is usually. But also the SBC with 200 kN/m2 will only satisfy for single floor building as for two floor the axial load is such that the SBC value comes less than footing pressure.So in this case do you design footing as strap footing,combined,etc or can rectangular footing can be provided?
Avarage pressure increases twice. Hence to get that equal we made 2xP/ Effective Area… U may refer the book of WC Teng for that. I’m not very sure about why the soil behaves that. It is complete advance soil mechanics part
Please come again, are you saying the total force in the triangular distribution would coincide with the supposed axial force P at an eccentricity e from the center of the footing?. I doubt it
Sir, In CSi safe Deff for foundations is taken with reference to top cover for punching shear check when we right click and check on ratios...How to solve this issue in csi safe..Also in newer versions reinforcement increases when mesh size is reduced whereas it was opposite in old version of 2016..So I always calculate reinforment from moment values..
Hi Sir, Can you please share the information that how to fine the natural frequency of real building. Real building means Scale model and having free vibration using shake table as well as in any Software. The point of concern is 3D building, we usually have 2D frame.
I am facing problems with column cardinal points while drawing columns. When I select Top Left while drawing, it goes to Bottom right. Sometimes Bottom Right, it goes Top Right. And it alwas vary column to column. Never same for every column. I request you to make a video on column cardinal points without using insertion point.
