Foundation laying problem

[eissenhover]

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I added a project to the link above, there is a building planned to be built on a sloping land. We are planning to turn and fill inside with a 2 meter high curtain, the superstructure will be a single-storey steel structure, at the points where the steel columns press, there is a curtain along the axis of the columns, that is, we did not want to put the columns on the fill. Due to the filling, the filling load is 3.2 tons per m2, the foundation section is insufficient. Also, when I enter the 3.2 tons filling load on the foundation, the roof trusses (I don't understand what's the relevance) are insufficient, the roof trusses save when the filling load is deleted, I defined the upper end of the columns as articulated, I also defined the beams that provide the connection between the columns as articulated, 1) How can I connect the trusses and columns in the project ? 2) How can I solve the basic cross section problem? Why don't the roof trusses recover when the fill load enters the foundation? 3) If you tell me about my design flaws, I would like to correct them. Thank you very much for your answers in advance, your experience is very valuable, I wish you a good work.

 

[nurgulkaya]

Hello there; There are 2 processes that need to be done in terms of steel. 1- Since you have a basement structure, your structure is not a mixed steel-reinforced concrete structure, the upper section is only steel, so we have adjusted your selection for the R coefficient. As steel and moment transmitting frame. 2- Divide your lovers from all intersections with the divide and join command. In terms of reinforced concrete; - All your curtains are marked as basement curtain. If you mark the sub-basement curtain in the program, these curtains are not included in the earthquake regulation overturn calculations, and the increases made in the structural system curtains such as TBDY 2018 4.3.4.9 article are not made. In this case, there is a logic error with your rigid basement acceptance as per TBDY 2018. Of course, a rigid floor that connects the basement curtains according to the model does not exist on the basement floor either. You should decide whether the curtains of this floor are basement or normal curtains and arrange your rigid sign for this situation. In summary, if they will be a basement curtain, remove the rigid basement sign. A constant load of 3.2 tf/m appears on your foundation. Your floor type is also bad and you are making an interactive solution. In the interactive solution, the movement of the foundation causes an effect on the superstructure, so the results that are different in the superstructure elements are not an error, but a requirement of the calculation logic. Bearing force, horizontal coefficient, etc. in the Soil section in the analysis settings. Check that your values are correct. Good work.

 

[eissenhover]

Thank you for your answer, Ms. Nurgül, I revised the choice of R and the purlins as you said, I removed the curtain under the columns and revised the reinforced concrete design, now all my elements are saved, but my period was around 1.7 seconds, my period was 0.7, I increased the floor height by 15 cm 1 It came to .7, my period must be somewhere very high, could you please re-examine the final version, I combined the trusses with the support area combination to the columns and defined the joint at the top end of the columns and all the beams. Since the building will be a glass facade, there will be no crosses between the columns etc. I can't assign.

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[nurgulkaya]

Hello there; There is a misunderstanding on the subject, as I understand, we did not specify that you should delete your curtains. These curtains and the curtains still present in the model have a sub-basement curtain sign. If these curtains are actually going to be basement curtains, remove the rigid x and y signs from the floor general settings, that's all you need to do. If these curtains are required to work both vertically and earthquakes as part of the load-bearing system, simply remove the sub-basement sign. Choosing one of these two situations would be the appropriate solution. The steel beams and their freedoms, which you remove the inner wall and place the columns and model under the steel columns, all affect the construction period. If the state in your first model is physically suitable, just decide whether the curtains are basement curtains as I wrote above and intervene in the program accordingly. Good work.

 

[eissenhover]

Hi; There is a misunderstanding on the subject, as far as I understand, we did not tell you to delete your curtains. These curtains and the curtains still existing in the model have a basement curtain sign on them. If these curtains are actually going to be basement curtains, from the floor general settings, rigid x and Remove the y sign, that's all you need to do. If these walls are required to work both vertically and earthquakes as part of the load-bearing system, just remove the sub-basement sign. It would be appropriate to choose one of these two cases. You removed the wall inside and placed columns and modeled it under steel columns. steel beams and their freedoms all affect the construction period.If the state in your first model is physically suitable, just decide whether the curtains are basement curtains as I wrote above and intervene in the program accordingly. Good work.

I forgot to write the most important problem, basic application When I draw the plan, the accessories are not visible, This is the first time I have encountered this problem, what is the reason? I removed the curtains independently of what you wrote, because it was not economical, there is no misunderstanding, the remaining curtains are basement curtains and as you said, I removed the stiffness boxes in the basement, but my main problem is that the period is 1.7, even if I change the beam freedoms, it did not affect the result, there is a overlap somewhere or something like that. I think I made a modeling mistake, when we make a modeling mistake, you say, for example, shift a beam by 5 cm and the results get much better.

 

[Ismail Hakki Besler]

Your system is not stable in X and Y directions. Make it stable.

 

[eissenhover]

Your system is not stable in X and Y directions. Make it stable.

Thank you Mr. Ismail, I can't get the raft foundation drawings, the blank sheet comes out without reinforcement, I wonder what the reason is, the system is still I will try to make it stable, because it is a glass facade, I could not cross between the columns

 

[Levent Özpak]

Thank you Mr. İsmail, I can't get the raft foundation drawings, the blank sheet comes out without reinforcement, what is the reason for this, I will try to make the system more stable, I couldn't cross between the columns because it is a glass facade

Hello, In the project you added, the reinforcements are drawn in the basic application plan on the basement floor.