CSI SAFE - 23 Pile Cap design
Attachment of Excel Sheets
1- Pile Cap Design Calculations for CSI SAFE
civilmdc.com/2020/03/09/pile-...
2-Pile Capacity Analysis Software
civilmdc.com/2020/03/09/pile-...
Details for Pile Cap design
A pile cap is one of the types of foundation that consist of a thick concrete pad that is usually supported by piles. This is commonly used in building foundations with the geographical locations having a very low soil bearing capacity. Pile cap serves to transmit the load of the building into the hard strata of the soil via a pile or group of piles. Design-wise, the pile cap design uses a truss system principle that can be designed using a strut and tie method. Designing a pile cap seems to be complicated because a lot of considerations need to take into account to achieve a safe and sound foundation. These considerations include the proper spacing of each pile, the pile cap thickness and so on. To achieve this can only be done by understanding its design principles and proper detailing of pile caps. The designer’s struggle on pile cap design begins with the consideration of what dimensions or pile cap geometry to assume at first. But knowing the correct pile cap dimensions can be considered as a halfway already in design completion.
In this article, we will be dealing with the standards in determining pile cap geometry and dimensions as well as its design considerations. To make it simple, we will break down our design assumption with the following
1. Recommended Shape and Its Dimensions
The first thing to consider in the pile cap design is to determine the shape of the pile cap to use. The shapes vary according to the number of piles in the pile cap that can be deriving according to the load in a column supporting it. The figure below shows the most common use shapes of the pile cap and the recommended dimensions.
2. Recommended Thickness of Pile Cap
One of the important things to consider in a pile cap design is to determine enough thickness. Pile cap thickness must also be sufficient to meet anchorage-bond length requirements of starter bars and normal punching shear requirements. Here is how to assume the thickness of the pile cap:
If diameter of pile less than 550mm: thickness = 2 x diameter of pile
If diameter of pile greater than 550mm: thickness = 1/3[(8 x diameter of pile)-600]
3. Punching Shear Check
Punching shear along the column perimeter should be satisfied according to the standard codes. Also, punching shear due to piles should also be considered in the design check.
4. Pile Cap Design Approach
There are so many ways to design a pile cap. Technically, it can be designed manually using a principle of strut and tie method. But if you are considering a wide pile cap supported by multiple numbers of piles, computer-generated structural design CSI SAFE software is available to design a massive pile caps.
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@mohammadmuminulislam6706
3 жыл бұрын
Thank you. Can you please make tutorials on combined Pile foundation & piled raft foundation?
Just Excellent, Nothing else, it is that what I looking for.
@civilmdc
4 жыл бұрын
Thanks for your valuable feedback
Thank you very much. Sir. May God Bless you more.
please guide about the area of steel for piles, how will we design the piles and the piers?
THANKES DEAR BROTHER YOUR LEESON WAS VERY ESSENTIAL FOR US
@civilmdc
28 күн бұрын
Welcome 🤗
Thank you very much, God bless you
God bless you sir. Thank you so much
Wish you all the best.
What is the source for "number of piles= 1.15*P......" formula? Code/book reference?
Thnk you very much
thank you so much. you saved me right here.
@civilmdc
3 жыл бұрын
Welcome
Awesome work mahn👍
Sir, how to calculate punching shear from piles. in columns we can add column size and software automatically calculate for punching shear. But, how can we give the pile size to do the same?
How about the shear reinforcement?? If the shear reinforcement is required in slab design display type, but the punching shear is okay (all is < 1), are we still need the shear reinforcement (shear links)?? thanks before
Hi pal. First of all, thank you so much for your awesome videos. I have the next questions for you. I hope that you help me answer them: - In the first excel sheet, Pz take a possitive sign. This means comppression? - Which is the way for incorporate the piles in the model? (not throught springs). - K constant of the springs, does take the soil effect? - Why don't you incorporate the soil subgrade modulus (by assign) in the pile cap slab?
Subscribed. Thanks.
hi sir, how about one way shear check & design Pile cap in CSI Safe ?
God bless you sir, thank you
@civilmdc
2 жыл бұрын
Welcome 😇
Great video
@civilmdc
4 жыл бұрын
Thanks Erim.
Do we use same design steps when designing pile cap for more than 1 column? just draw the addition columns ?
Great...God bless you friend
@civilmdc
2 жыл бұрын
Thank you so much
Hello Sir. I have question. I already follow your steps but my pile cap is not stable since the spring (pile) not connected to the pile cap (when I right click the point, it shows connection is none). May I know how to solve this problem. Thanks in advance.
Thanks
Truly helpful. More power to u.
@civilmdc
5 жыл бұрын
Thank you very much brother.
Thanks for uploading the missing videos...
@civilmdc
5 жыл бұрын
Welcome
thanks....masters
How to check pile cap for one way shear. can you add this in your next video
Do a video on raft pile foundation in etabs
best chaneel thanks sar
@civilmdc
2 жыл бұрын
Thanks brother
how to design pile cap with multiple complex shaped columns - like , L-shape, T-shape columns... specially in lift core?
@civilmdc
3 жыл бұрын
Same way... Define.. column with different shape...( In cross section) And then use same... Procedure as shown in this video..
Sir How to design pile design in prokon.
Wonderful working brother... But your both links in the description are not working. There is no file in those links....
@civilmdc
4 жыл бұрын
Sorry for Inconvenience, All the links have been updated, Now you can download the excel sheets in the description of the videos. Thanks
Can the same excel files be used for pile design as per (Indian) IS code??? Thank u.....
@civilmdc
5 жыл бұрын
You have just... confirm the spacing criteria, rest of the procedure will be same
Why horizontal reactions are not showing...why only vertical reaction is showing?
Good sir
how could i use or upload this excel sheet?
@civilmdc
4 жыл бұрын
dear, excel sheet link is given in the description of this video, just click the link ..... then Press RED DOWNLOAD BUTTON, That is it , if you still face issue, please feel free to contact. thanks
Dear, how can I download the excel file of 23 pile cap design?
@civilmdc
3 жыл бұрын
Excel sheet Download link given in the description of each video
i can't download the link ....can some body help?
Bro, I try with pile cap 4 pile dia 1m, column 1x1m, see the result of punching shear at column is not correct if compare by hand, as SAFE provide the shear force from column is not correct and lead the result not correct too. try it
sir how to calculate how reinforcement we need in strip a manually
@civilmdc
3 жыл бұрын
Here is the full course link on CSI SAFE kzread.info/head/PL0h14oMuZXQ6l-O7aqF0hYsZbyJ7eFt1H See the lecture slab design... You will see how to interpret results
Dear M Hussain Can you please send me the piles design excel sheet that you used in video Thanks Jamal
@civilmdc
4 жыл бұрын
Dear Download link is given in the description of video.... Please check.. You will get it.
Dear, please tell how do you find the value of Pz, Mx, My?
@civilmdc
3 жыл бұрын
From super structure.... For example ... You can take these values .. from etabs... Column reactions
@md.ashrafulalam4732
3 жыл бұрын
@@civilmdc from etabs i got Fy (shear force). But how do you get moment?
Hi Sir, I am unable to get the punching shear for the piles but column i got it.....i dont know why, i followed your step...pls help
@civilmdc
3 жыл бұрын
Hi , Please watch again... You will get the point
@marimuthumuniandy7689
3 жыл бұрын
@@civilmdc No, i still not getting the punching shear for the pile
Asslamualikum sir why 6 inch width column fail in etab . Only ground floor design
@civilmdc
4 жыл бұрын
Overites... CHANGE to sway normal.... 2nd what is column height?
@ajazsayyed8487
4 жыл бұрын
@@civilmdc 3.2m
@ajazsayyed8487
4 жыл бұрын
Thank you very much sir .
@civilmdc
4 жыл бұрын
@@ajazsayyed8487 the height is too much... You have to try 9" thick column... Tip: you can try in the overites... Change sway special to sway ordinary...
Where is your references for these calculations?
when i draw matt the got automatic subtruct
@civilmdc
4 жыл бұрын
Please explain little bit more... What abstract? 1
Sir support data ki value toh change hi nahi ki.... Kya faida thickness increase karne ka
Pls explain some one, what is column stiff. I cannot understand the term.
@civilmdc
2 жыл бұрын
Means .. rigidity
@jewelkhan847
2 жыл бұрын
@@civilmdc how much area i should provide in safe software?? How i consider??
@civilmdc
2 жыл бұрын
@@jewelkhan847 Here is the full course link on CSI SAFE kzread.info/head/PL0h14oMuZXQ6l-O7aqF0hYsZbyJ7eFt1H Please cover course.. your concepts Will be clear
why the column assigned as stiff member?
@civilmdc
10 сағат бұрын
@@foohong3235 Simply... To get punching shear...
Why it shows N/C in my punching shear design ?
@civilmdc
3 жыл бұрын
Make sure.... You have defined... Punching Shear shear area.... 2nd... If you provided beam... Then.. It will not calculate
@fahedjavaid1
3 жыл бұрын
@@civilmdc how to define the shear area in safe for punching check
@civilmdc
3 жыл бұрын
@@fahedjavaid1 when you go for ... Applying of load.... Then at that point.... You will assign Shear area.
@fahedjavaid1
3 жыл бұрын
@@civilmdc i cant find as i have imported model from etabs for load reaction, can u give ur call number plz,
@civilmdc
3 жыл бұрын
@@fahedjavaid1 When you import from ETABS.... it automatically generate shear area... for punching..... Right click on the point ... which you have imported from ETABS.... then... under loads ... you will see punching area...
Hi .! the sound is a bit low
@civilmdc
2 жыл бұрын
Hi, Noted with thanks.... In Upcoming Videos, It will be improved
Punching shear check is not properly i have checked because you assigned column and pile as a slab. I have checked in output file of safe, it is not calculating punching perimeter properly
@civilmdc
4 жыл бұрын
Dear it is simple for checking punching shear... Just right click on the punching shear value.... You will get the details... From your point of view... You want to say something... I respect your view... Kindly can you send me the screenshots at civilmdcgroup@gmail.com
@akashsorathiya3078
4 жыл бұрын
I have sent please check thank you
@civilmdc
4 жыл бұрын
@@akashsorathiya3078 Sure dear, Received right now i am little busy... i will check and definitely answer you back.
@civilmdc
4 жыл бұрын
@@chinyerefemi3598 confirmed
sir add the link for spread sheet to download
@civilmdc
2 жыл бұрын
Link is given in the description of the video
ENG, can you please give us the excel sheet
@civilmdc
3 жыл бұрын
Excel sheet link is given in this description
@abdallayousif5197
3 жыл бұрын
there are errors on link in description can u please upload it again with software you used for geo please
@civilmdc
3 жыл бұрын
@@abdallayousif5197 Link updated, please check it now.
Structure Design Engineer Software
sir excell provide kr do please
@civilmdc
Жыл бұрын
Download link is given in the description of the video
RESULT DOES NOT MATCH WITH HANDCALCULATION.
@civilmdc
5 жыл бұрын
Dear, can you explain little bit more.,,,, like what is the difference?
@engrkaribul
5 жыл бұрын
@@civilmdc In hand calcultaion, the punching is okay with 30" slab. But the procedure of the video required more thickness. My punching is okay, where your punching is 1.2 in USD design.
@civilmdc
5 жыл бұрын
@@engrkaribul Bro... Please send me pics of your calculations... civilmdcgroup@gmail.com So that I can analyze in detail... So that I can understand... Where the issue is.... And I am able to clearly see... Where is the error? Thanks in anticipation.
@engrkaribul
5 жыл бұрын
@@civilmdc Please check your email. Sent you hand calculation as .JPEG and also corresponding safe .FDB file
@civilmdc
5 жыл бұрын
@@engrkaribul Ok.. i will check.
How about the shear reinforcement?? If the shear reinforcement is required in slab design display type, but the punching shear is okay (all is < 1), are we still need the shear reinforcement (shear links)?? thanks before
Thanks