Did you just make a scenario where the two moments are not acting at the same time? I thought this is for a biaxial moment analysis? In my mind it should be q = P/A +- 6MxRy/Ix +- 6MyRx/Iy?
Would you make a video, having column at the top right corner of the footing with Mx and My at the column? Looking forward for that video. Thanks in advance.
While checking the footing for pressure, you do not need to factor loads. footing pressure is always checked for un-factored loads against net SBC value, as per your Soil report.
to find stress along x axis, My should should be used, isn't it? since Mx is assumed to be moment about y axis from what is shown in the figure though it is unconventional, solution could be deemed as correct though some explanation might be needed, I guess.
Sir how do we know if the footing is subjected to bi-axial or uni-axial bending ...Can you please give details explanation how to know while design in this type of footing in real life design
@@civilconst ...Sir if moment develops about two axes then there will be a eccentricity between load line and centroidal of footing ..Also the column should not equal projections on both axes ...But u took here the column at centre of footing then how it will become a eccentricity ...If a footing centroid and column load having eccentricity the only moment will produce ...In this video you did not mention the eccentricity
@@anand4236 That's the idea here. Either you can consider eccentricity and provide footing size concerning it or design footing by considering the moments. In the first case, you will get equal pressure on either side as you have selected footing and column location considering eccentricity but in the later one, you will get different soil pressure due to moment value as the column is centrally located. Hope this helps you. Cheers
@@civilconst ... Yes sir i understood what you said....You gave one idea from this example how to design footing if footing is subjected moments but if you give the exact design of footing like ...in isolated footing When column is kept at corner of the footing and edge of the footing how pressure variation takes place ...How to check for one way and two way shear ...If possible please do each video on the column kept at corner and adge of the footing it will give more clarity
Did you just make a scenario where the two moments are not acting at the same time? I thought this is for a biaxial moment analysis? In my mind it should be q = P/A +- 6MxRy/Ix +- 6MyRx/Iy?
Yes I think! What ever he have done is incorrect at place of calculating net upward pressure!
ruclips.net/video/9CXMIpjtSs4/видео.html&feature=share
@@sanvihome1425 is it incorrect to take both moments separately
brother i am confused please enlighten me to understand ,or please share a link of biaxial footing designing
Would you make a video, having column at the top right corner of the footing with Mx and My at the column? Looking forward for that video. Thanks in advance.
This is great video.Can you please go over mat foundation too. Is it the same for C channel column with foot plate? Thank you.
Thanks.
Will try
thanks, your effort is appreciated.
Cheers
While checking the footing for pressure, you do not need to factor loads. footing pressure is always checked for un-factored loads against net SBC value, as per your Soil report.
Will check for factored soil bearing capacity. That will do it
Both side 1.5 is cancelled out... there's no meaning of factored load and factored sbc😂
If we take factored load no need 1.5sbc
If we take unfactored load we need 1.5sbc
factored SBC is get by dividing SBC by 1.5 not multiplying
Soil factors are usually higher than load factors
Very conceptually explained 👌
Thank you. Glad it helped
Superb presentation. Thank you very much Sir. Please make a video for the design of transmission tower foundation .
Thanks. Will upload a video on that soon.
Brilliant strlengr u had designed deploying law of similar things etc compared to grap.charts thanks
Glad you liked it
I think the section modulus for the moments have been calculated for opposite dimensions, any thoughts?
In his diagram (the plan view), the vertical axis is labelled as X while the horizontal is Y. Thus his computation seems correct.
Very useful Lecture. THANKS
Thanks and welcome
Sir, in calculation of net soil pressure on footing, only axial load is to be considered, is self weight of footing will have to consider,
Yes, we need to consider it.
to find stress along x axis, My should should be used, isn't it?
since Mx is assumed to be moment about y axis from what is shown in the figure though it is unconventional, solution could be deemed as correct though some explanation might be needed, I guess.
This will be applicable for square footing????
I have uploaded for square footing as well
you can check that
@@civilconst isolated square footing with biaxial moment k liye bhi upload krdo
The process is same. Reinforcement will be same in either direction.
While calculating section modulus, isnt the d refered is the depth of footing ? Rather than length and width of footing.
Not in this case as we are considering x and y direction not Z direction.
ruclips.net/video/9CXMIpjtSs4/видео.html&feature=share
Sir how do we know if the footing is subjected to bi-axial or uni-axial bending ...Can you please give details explanation how to know while design in this type of footing in real life design
Biaxial means moment along two axis.
@@civilconst ...Sir if moment develops about two axes then there will be a eccentricity between load line and centroidal of footing ..Also the column should not equal projections on both axes ...But u took here the column at centre of footing then how it will become a eccentricity ...If a footing centroid and column load having eccentricity the only moment will produce ...In this video you did not mention the eccentricity
@@anand4236 That's the idea here. Either you can consider eccentricity and provide footing size concerning it or design footing by considering the moments. In the first case, you will get equal pressure on either side as you have selected footing and column location considering eccentricity but in the later one, you will get different soil pressure due to moment value as the column is centrally located.
Hope this helps you. Cheers
@@civilconst ...
Yes sir i understood what you said....You gave one idea from this example how to design footing if footing is subjected moments but if you give the exact design of footing like ...in isolated footing When column is kept at corner of the footing and edge of the footing how pressure variation takes place ...How to check for one way and two way shear ...If possible please do each video on the column kept at corner and adge of the footing it will give more clarity
@@anand4236 Sure will make that one soon.
Nice Video. Continue the work
Thanks
Sir minimum ast you took small d but it should be D
Yeah. Considering gross area, we should take D.
why is SBC multiplied by 1.5?
Factor of safety
Time=25.25, %age of steel value is not correct. I think the equation is incorrect.
If it's longer span that you have considered than d2 should have been considered
Sbc can't be factored
Just for factored load.
This one is very very helpful. Thankyou so much.. can you please give your email id?
ruclips.net/video/9CXMIpjtSs4/видео.html&feature=share
Sir provide pdf
ruclips.net/video/9CXMIpjtSs4/видео.html&feature=share
sir soil bearing capacity is divided by 1.5 not multiplied