Dr. Saleema Panda Ma'am, I have a few doubts regarding the design presented in the video. BM you considered for design of vertical walls and main reinforcement placement. You have idealized the vertical walls to be a propped cantilever, right and calculated the BM also using same idealizations. Then the main reinforcements should also be in vertical direction rather than in horizontal direction.
Here, L/B = 11.35/5 = 2.27 > 2. Hence, Long walls will act as cantilever throughout 2.8m. For short walls, first 1 m will act as cantilever, the remaining 2.85 - 1 = 1.85 m will act as slab fixed supported between long walls. Also long walls will be subjected to axial tension + Moment and axial compression + moment. Similarly short walls above 1 m will also be subjected to BM + Axial Tension and BM + Axial Compression. Normally the underground tanks are designed for (i) Tank empty + soil outside and (ii) tank full + no soil outside as two critical conditions. Sometimes, we need to consider soil outside as saturated condition also. Additionally, in this case you have taken wl^2/15 as maximum moment. We need to also provide the reinforcement for wl^2/33.5 as it is having an opposite direction BM.
Ma'am some people will say that sump tanks will be designed by working stress method.but you had done design by limit state method. Can u please describe and show the detailing part of sump tank so it can help us Thank you ma'am
Hello mam Good evening Thank you for this video this is very useful but i had few doubts can you please help 1. How did you got 160000 as weight of soil 2. How you gots that angel i mean as per real base example And 3 you didn't talked-about hunch bar 4 which code should follow to understand reinforcement detailing of underground water tank thank you
Both hinged means indeterminate structure. You can analyze to calculate the moment due to triangular load of water pressure and lateral soil pressure on the wall by using any structural analysis method.
Maam, thankyou for the ldesign lecture. And how to derive the equation of bending moment for propped cantilever with triangular load ?... if you can kindly send me any reference...
Thank you for your video. Why we did not re-check the thickness of concrete that we assume? Kindly advise please.
Dr. Saleema Panda Ma'am, I have a few doubts regarding the design presented in the video. BM you considered for design of vertical walls and main reinforcement placement. You have idealized the vertical walls to be a propped cantilever, right and calculated the BM also using same idealizations. Then the main reinforcements should also be in vertical direction rather than in horizontal direction.
Here, L/B = 11.35/5 = 2.27 > 2. Hence, Long walls will act as cantilever throughout 2.8m. For short walls, first 1 m will act as cantilever, the remaining 2.85 - 1 = 1.85 m will act as slab fixed supported between long walls. Also long walls will be subjected to axial tension + Moment and axial compression + moment. Similarly short walls above 1 m will also be subjected to BM + Axial Tension and BM + Axial Compression. Normally the underground tanks are designed for (i) Tank empty + soil outside and (ii) tank full + no soil outside as two critical conditions. Sometimes, we need to consider soil outside as saturated condition also. Additionally, in this case you have taken wl^2/15 as maximum moment. We need to also provide the reinforcement for wl^2/33.5 as it is having an opposite direction BM.
do you have notes like thing so that i can refer it sir
Nicely explained in a simple way. But the main steel for the vertical walls to be placed vertically not horizontally as mentioned.
During design of wall thickness
Gravity load is not considered??
Why in the minimum reinforcement of cracks fy multiply into 0.87 madam
Can i get the pdf of the above design? Thank you in advance
Very nice explanation 👌👌👌👌
Hi,
Mu=0.87*fy*Ast*d(1-(fy*Ast)/(fck*b*d))
Right?.
Why is 0.42/0.36 multiplied with (fy*Ast)/(fck*b*d)?
Dear madam please help me out in underground water tank bottom slab, Main bar or Distribution bar come in long span or span.
Your explanation is good, Can you explain code book reference formulas in detail wise
its very good and clear.Thanks Madam
can u share this pdf and from which book the reference u have taken mam
Upward force calculations not explained. Weight of base slab not explained fully
Mam this method is WSM
Nice sharing.
Could you share the same case for horizontal cylinders tank as per UL58? Thanks.
Mam, can you provide the reference names or material book for the given type of problem?
For u should write formulas and then substituting the values then we can easily....
shouldn't the percentage of minimum reinforcement be 0.12 % ?
Refer Clause 8.1 of IS 3370 part 2 (2009), minimum reinforcement in water tanks 0.35%
@@SaleemaPanda1990 for deformed bars percentage of minimum reinforcement can be taken 0.24% for both face. Means 0.12% for each face.
uplift pressure you multiplied by the length and how come its a upword pressure
video time 15.47
@@akshaysatputemarathivlogge5026 Uplift pressure is multiplied with length and unit width to get upward force
Ma'am some people will say that sump tanks will be designed by working stress method.but you had done design by limit state method. Can u please describe and show the detailing part of sump tank so it can help us
Thank you ma'am
Thank you for sharing
Madam,On which ref we have provide horizontal distribution r/f 12mm@250mm c/c...
what code are you using, Ma'am?
Indian standard code
@@SaleemaPanda1990 Thanks. do you have example using ACI code?
@@billyjoebreakfast5922 okay
@@billyjoebreakfast5922 th-cam.com/video/QfCYo24ustE/w-d-xo.html
@@SaleemaPanda1990 Hi Good Day, Thanks much for your positive response. more power to you.
Hello mam
Good evening
Thank you for this video this is very useful but i had few doubts can you please help
1. How did you got 160000 as weight of soil
2. How you gots that angel i mean as per real base example
And
3 you didn't talked-about hunch bar
4 which code should follow to understand reinforcement detailing of underground water tank thank you
bhai isko limot state method se krke bta do
Hey..thanks for sharing your knowledge...have a few queries...is there an email.id i can send it on
Please share this pdf file if possible
Yes, I agree, it should be very useful to compare with the other video by ACI method.
Steel grade 415 use of 0 .12% steel
Fe 250 0.35%
Thanks
if the top and bottom hinged in an underground rectangular tank
Both hinged means indeterminate structure. You can analyze to calculate the moment due to triangular load of water pressure and lateral soil pressure on the wall by using any structural analysis method.
th-cam.com/video/DnV-XlMNUjE/w-d-xo.html
@@SaleemaPanda1990 Thank You
Or LSM
Maam, thankyou for the ldesign lecture. And how to derive the equation of bending moment for propped cantilever with triangular load ?... if you can kindly send me any reference...
th-cam.com/video/8Nl6YqQBQSI/w-d-xo.html