Raft Foundation Soil Safety Stress Problem

B

brcsnt

New Member
Hi, There is a 2b+z+5nk 65 cm raft foundation structure in the attached project. The building is adjacent from 2 directions (the area within the 9 cm cantilever earthquake joint), zero to the road from 1 direction. the console can only be exited in one direction. "Top title interactive solution" has been made. Soil according to earthquake loadings. emn. ger. control has been made. "Soil stretching" does not save. I would be glad if you could help me with what to do. -There are also 2 basement floors and there are basement curtains in 3 directions in these basements. These 2 basement floors should be taken as rigid basement floors. Or should the basement floor number be -3?
 
Mr. brcsnt My suggestions for your project; 1- It would be appropriate to give the upper rigid floor number -3, 2- Remove the elevator floor given on the terrace floor. Give the floor loads to the beams, 3- Increase the thickness of the insufficient beams, 4- Correct the existing errors in the columns (B), 5- Put the stair mezzanine beam, 6- Correct your stair support conditions incorrectly, 7- You can reduce the attic loads, 8- In the attic cantilever beam, stuck to the beam, model this part as a balcony, 9- Increase the raft foundation thickness a little and thicken the iron, 10- When these are done, your floor safety does not save. (There is little difference.) 11- Geology Eng. talk, can it increase the ground safety by 2-3 t/m2? If it doesn't, it should let you know how thick the stabilized filling will be laid and give the floor safety. Take it easy Unver ÖZCAN
 
"brcsnt":2iievdbe" said:
Hi, There is a 2b+z+5nk 65 cm raft foundation in the attached project. The building is adjacent from 2 directions (the area within the 9cm cantilever earthquake joint), zero to the road from 1 direction. only in one direction console can be exited basically. "Top roof interactive solution" has been made. Soil safety tension control has been made according to earthquake loadings. "Soil tension" is not recovering. I would appreciate if you can help with what can be done.
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Hello, Analysis Settings to overcome the stress problem You can analyze by ticking -Use multiple conjugate Winkler spring method in Matte Foundations- option in /Foundation Soil Tab. In addition, -Stairs structure is not arranged together according to solution conditions.Therefore, you need to analyze according to Full Rigid diaphragm option. It would be appropriate. Also, the stair arms are not formed correctly. Both arms start from step 1. (If you are going to analyze according to the semi-rigid diaphragm, it is necessary for the meshes in the 1st and 2nd basement floors to be fully formed. Define the misalignment of the panels in PB003 as 0.001.) - It would be appropriate to use the rigid diaphragm creation option for the slab no. OD003 located at -250 cm elevation in the attic. Good work
 
Thanks for the replies. I hadn't gone through the project fix yet. First of all, I started the corrections without the foundation ground safety tension. Problems solved, thanks.
 
Hello. I am also building an additional classroom in a school. Since the part coming to the school is adjacent to the school, when I take the raft embankment as zero in that part, the ground safety stress is negative. I have solved the system as if it is not contiguous, but with ambatman from four corners, but I am thinking of putting tie beam detail on the adjacent part in the autocad output. I wonder if it's healthy, I'm waiting for your feedback
 
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