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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[@civilmdc]

To make a RELATIONSHIP, Don't forget to press the subscribe button with bell icon to get the latest notifications. My channel :) kzbin.info/door/w9kSuR1bTFBmaMEyD_DXvQ

[@mohammadmuminulislam6706]

Thank you. Can you please make tutorials on combined Pile foundation & piled raft foundation?

[@lhrete9878]

Thank you very much. Sir. May God Bless you more.

[@md.giasuddinchowdhury5196]

Just Excellent, Nothing else, it is that what I looking for.

[@civilmdc]

Thanks for your valuable feedback

[@raeidsuliman456]

Thank you very much, God bless you

[@kennyomega8937]

God bless you sir. Thank you so much

[@yaqubtasal]

THANKES DEAR BROTHER YOUR LEESON WAS VERY ESSENTIAL FOR US

[@civilmdc]

Welcome 🤗

[@meruhakoe]

thank you so much. you saved me right here.

[@civilmdc]

Welcome

[@muhsinyp3439]

Awesome work mahn👍

[@theplananddesignengineers8354]

Wish you all the best.

[@mmtcapo]

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?

[@shamsulalamdhaka]

Subscribed. Thanks.

[@AliSadk-zl7fb]

Thnk you very much

[@bondrude9307]

God bless you sir, thank you

[@civilmdc]

Welcome 😇

[@theara6868]

Thanks

[@hartonodjaja]

thanks....masters

[@Engr_Zeeshan]

please guide about the area of steel for piles, how will we design the piles and the piers?

[@AsheqElahi]

What is the source for "number of piles= 1.15*P......" formula? Code/book reference?

[@imamardiansyah3942]

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

[@komangerim5297]

Great video

[@civilmdc]

Thanks Erim.

[@safebuildingplans1760]

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?

[@omgomase84]

Great...God bless you friend

[@civilmdc]

Thank you so much

[@m.shaihanayub7179]

Truly helpful. More power to u.

[@civilmdc]

Thank you very much brother.

[@astmcivil]

best chaneel thanks sar

[@civilmdc]

Thanks brother

[@mehedihasanasif6958]

Do we use same design steps when designing pile cap for more than 1 column? just draw the addition columns ?

[@khairulrohayzi2452]

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.

[@malapatisuresh]

Good sir

[@gjmichaelson3739]

Thanks for uploading the missing videos...

[@civilmdc]

Welcome

[@csikhmerengineering1391]

hi sir, how about one way shear check & design Pile cap in CSI Safe ?

[@abhishekpujar4043]

Do a video on raft pile foundation in etabs

[@brahul7899]

How to check pile cap for one way shear. can you add this in your next video

[@akshaytapkir6821]

Why horizontal reactions are not showing...why only vertical reaction is showing?

[@engr.palash2805]

how to design pile cap with multiple complex shaped columns - like , L-shape, T-shape columns... specially in lift core?

[@civilmdc]

Same way... Define.. column with different shape...( In cross section) And then use same... Procedure as shown in this video..

[@syedarsalanali8506]

Wonderful working brother... But your both links in the description are not working. There is no file in those links....

[@civilmdc]

Sorry for Inconvenience, All the links have been updated, Now you can download the excel sheets in the description of the videos. Thanks

[@dhanajaybhavsar9721]

Sir How to design pile design in prokon.

[@azmat_waseem]

Can the same excel files be used for pile design as per (Indian) IS code??? Thank u.....

[@civilmdc]

You have just... confirm the spacing criteria, rest of the procedure will be same

[@ramziqafisha]

how could i use or upload this excel sheet?

[@civilmdc]

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

[@mohammadmuminulislam6706]

Dear, how can I download the excel file of 23 pile cap design?

[@civilmdc]

Excel sheet Download link given in the description of each video

[@chsetha2630]

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

[@hamajr8833]

Where is your references for these calculations?

[@omygod1590]

sir how to calculate how reinforcement we need in strip a manually

[@civilmdc]

Here is the full course link on CSI SAFE kzbin.info/aero/PL0h14oMuZXQ6l-O7aqF0hYsZbyJ7eFt1H See the lecture slab design... You will see how to interpret results

[@nahiye19lij81]

i can't download the link ....can some body help?

[@AbhishekVerma-yx2dv]

Sir support data ki value toh change hi nahi ki.... Kya faida thickness increase karne ka

[@drjamalkhalaf3938]

Dear M Hussain Can you please send me the piles design excel sheet that you used in video Thanks Jamal

[@civilmdc]

Dear Download link is given in the description of video.... Please check.. You will get it.

[@md.ashrafulalam4732]

Dear, please tell how do you find the value of Pz, Mx, My?

[@civilmdc]

From super structure.... For example ... You can take these values .. from etabs... Column reactions

[@md.ashrafulalam4732]

@@civilmdc from etabs i got Fy (shear force). But how do you get moment?

[@ajazsayyed8487]

Asslamualikum sir why 6 inch width column fail in etab . Only ground floor design

[@civilmdc]

Overites... CHANGE to sway normal.... 2nd what is column height?

[@ajazsayyed8487]

@@civilmdc 3.2m

[@ajazsayyed8487]

Thank you very much sir .

[@civilmdc]

@@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...

[@marimuthumuniandy7689]

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]

Hi , Please watch again... You will get the point

[@marimuthumuniandy7689]

@@civilmdc No, i still not getting the punching shear for the pile

[@foohong3235]

why the column assigned as stiff member?

[@civilmdc]

@@foohong3235 Simply... To get punching shear...

[@matrichayapropertiesltd.500]

when i draw matt the got automatic subtruct

[@civilmdc]

Please explain little bit more... What abstract? 1

[@jewelkhan847]

Pls explain some one, what is column stiff. I cannot understand the term.

[@civilmdc]

Means .. rigidity

[@jewelkhan847]

@@civilmdc how much area i should provide in safe software?? How i consider??

[@civilmdc]

@@jewelkhan847 Here is the full course link on CSI SAFE kzbin.info/aero/PL0h14oMuZXQ6l-O7aqF0hYsZbyJ7eFt1H Please cover course.. your concepts Will be clear

[@Johnny-pz3ch]

Why it shows N/C in my punching shear design ?

[@civilmdc]

Make sure.... You have defined... Punching Shear shear area.... 2nd... If you provided beam... Then.. It will not calculate

[@fahedjavaid1]

@@civilmdc how to define the shear area in safe for punching check

[@civilmdc]

@@fahedjavaid1 when you go for ... Applying of load.... Then at that point.... You will assign Shear area.

[@fahedjavaid1]

@@civilmdc i cant find as i have imported model from etabs for load reaction, can u give ur call number plz,

[@civilmdc]

@@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...

[@huuthangtran1924]

Hi .! the sound is a bit low

[@civilmdc]

Hi, Noted with thanks.... In Upcoming Videos, It will be improved

[@shahidali-zy2bw]

sir add the link for spread sheet to download

[@civilmdc]

Link is given in the description of the video

[@longmengleang4590]

Structure Design Engineer Software

[@akashsorathiya3078]

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]

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 [e-mail]

[@akashsorathiya3078]

I have sent please check thank you

[@civilmdc]

@@akashsorathiya3078 Sure dear, Received right now i am little busy... i will check and definitely answer you back.

[@civilmdc]

@@chinyerefemi3598 confirmed

[@abdallayousif5197]

ENG, can you please give us the excel sheet

[@civilmdc]

Excel sheet link is given in this description

[@abdallayousif5197]

there are errors on link in description can u please upload it again with software you used for geo please

[@civilmdc]

@@abdallayousif5197 Link updated, please check it now.

[@shaileshbisht2758]

sir excell provide kr do please

[@civilmdc]

Download link is given in the description of the video

[@engrkaribul]

RESULT DOES NOT MATCH WITH HANDCALCULATION.

[@civilmdc]

Dear, can you explain little bit more.,,,, like what is the difference?

[@engrkaribul]

@@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]

@@engrkaribul Bro... Please send me pics of your calculations... [e-mail] 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]

@@civilmdc Please check your email. Sent you hand calculation as .JPEG and also corresponding safe .FDB file

[@civilmdc]

@@engrkaribul Ok.. i will check.

[@princessa9045]

Thanks

[@imamardiansyah3942]

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