The stapling problem on the raft basis

[erimer]

Greetings, I have a few questions about the project I made in the attached link. 1. Although there is no stapling problem in reinforced concrete deficiencies, when I look at the reports, columns with stapling errors appear on the last page of the raft foundation. What could be the reason for this? 2. The effective plate thickness is 50 cm as far as I understand. but there is a 5.5 meter pile foundation under it. According to my logic, the effective thickness should be 6 meters, not 0.5, and stapling should not be possible at this height. I wonder if the software calculates as if there is no pile foundation? Regards and love

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[erimer]

As far as I understand, no forum admin from Idecad is looking here. Anyone have any ideas from other users? Greetings and love

 

[HakanŞahin]

Greetings, I have a few questions about the project I made in the attached link. 1. Although there is no stapling problem in reinforced concrete deficiencies, when I look at the reports, there are columns with a stapling error on the last page of the raft foundation. As far as I understand, the effective thickness of the plate is taken as 50 cm, but there is a 5.5 meter pile foundation under it. According to my logic, the effective thickness should be 6 meters, not 0.5, and punching should not be possible at this height. I wonder if the software calculates that there is no pile foundation? Best regards

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Hello warns both in the dialog and in the report. Is it possible that calculation and section tolerances were given first in the analysis settings, and then they were reset but not reanalyzed? 2. The stapling control is done along the stapling perimeter and the stapling perimeter is from the column. d/2 away. The plate thickness in that region is as much as the raft thickness. However, punching control is done for the raft foundation in the program, piles are not taken into account.

 

[erimer]

Hello, as an answer to the 1st question, I manually increased the additional reinforcements on the raft foundation and made the foundation recoverable. Then, by clicking on any of the insufficient columns in the analysis model and pressing the REINFORCED CONCRETE button, I made reinforced concrete again. At this point, the raft does not give any errors other than stapling. I can't logically think of stapling on a record with a 5.5 meter pile underneath, but I wanted to ask just to be sure. In your 2nd answer you said that piles are not taken into account, but in reality there are piles there and they will seriously interfere with stapling. Is my way of thinking wrong for you? Greetings and love

 

[HakanŞahin]

Hi, as an answer to question 1, I manually increased the additional reinforcements on the raft foundation and saved the foundation. Then I clicked on any of the insufficient columns in the analysis model and pushed the REINFORCED CONCRETE button. At this point, I made the reinforced concrete again. Logically, I can't think of a stapling in a plate with a 5.5 meter pile under it, but I wanted to ask just to be sure.

Hello again .

2. You said in your answer that stakes are not taken into account, but in reality there are stakes there and they will seriously interfere with stapling. Is my way of thinking wrong for you? Greetings and love

2. The stakes are taken into account. The superstructure is completely dissolved together with the structure-raft foundation-piles interactively. The point I have mentioned is the useful height used in punching control, which is considered as the raft thickness at d/2 distance from the column according to the TS500. The thicker the plate is at the d/2 distance, the punching control should be considered for that thickness. Good work

 

[erimer]

Hello again, There is an issue that I cannot solve. After the reinforced concrete is made, the Reinforced Concrete deficiencies button gives Green and Check. When I click on the pull down menu of this button, all of them are green and Check, including the stapling strength. I couldn't figure out why the stapling strength still appears to be insufficient in the raft report, when everything seems fine. I would also like to share that while the punching problem appears in both the column report and the raft foundation report before the reinforced concrete is made, the punching problem disappears in the column report after the reinforced concrete is made, but remains in the raft report. It is as if the raft report still memorized the data before the reinforced concrete was built. Can we shed some light on this issue? Greetings and love

 

[HakanŞahin]

There is one issue that I could not solve. After I have reinforced concrete, the Reinforced Concrete deficiencies button is Green and gives Check. When I click on the pull down menu of this button, all of them, including the punching strength, are green and Check. Why is it that everything looks okay? The stapling strength still seems insufficient in the raft report. It's like we memorized the data before it was done. Can we shed some light on this issue? Greetings and love

If you compare the values in the report with the values given in the reinforced concrete dialog, you can see that the analysis and control values are the same, the issue is only related to the warning not given in the reinforced concrete dialog. You can observe that. It has been included in our subject notes to give a warning in the reinforced concrete dialogue.

 

[HakanŞahin]

Hi, as an answer to question 1, I manually increased the additional reinforcements on the raft foundation and saved the foundation. Then I clicked on any of the insufficient columns in the analysis model and clicked the REINFORCED CONCRETE button. At this point, I made the reinforced concrete again. Logically, I can't think that a plate with a 5.5 meter pile can have stapling, but I still wanted to ask to be sure.

A plate with a 5.5 meter pile may or may not have stapling. In the program, the stapling control is done according to the principles given in TS500. Here N1 column normal force, Fa are variables depending on the punching circumference and the soil stress within the punching area N1 column normal force decreases in piled foundation Fa depends on whether the raft is taken into account in the pile foundation solution Vpd= N1- Fa Fa= qsp * StaplingAre from the column d/ Stapling area at 2 distance = (b+d)*(h+d) qsp= soil stress within the punching area i I solved your project as a raft plate without pile and by taking the piled raft plate, raft bed coefficient zero. Pile-based solution C18 column punching values: Raft foundation solution without pile, C18 column punching values: If we examine the results, the punching force is less in the piled foundation solution, but it does not meet the control requirement.

In your 2nd answer you said that piles are not taken into account, but in reality there are piles there and they will seriously prevent stapling. Is my way of thinking wrong for you? Greetings and regards

My point is that piles are not taken into account not, the useful height used in punching control, which is considered as the raft thickness at d/2 distance from the column according to TS500, as seen in the screenshots I have attached above, the piles are taken into account.The superstructure is interactively dissolved together with the structure-raft foundation-piles.Piles do not prevent stapling. but it depends on the project.