Foundation with trapezoidal geometry

[insburak355]

I HAVE A TROPHY FOUNDATION WITH STRAIGHT ON 3 SIDES AND 1 SIDED INSIDE MY PROJECT BODRUM FLOOR 4 UNDER NORMAL CONDITIONS, THE FOUNDATION IS 60 - 70 CM AND IT IS VERY COMFORTABLE WITH 16 OR 18 SIZE IRON. I TRIED MANUAL DRAWING A AXIS OF ACCOUNT BUT IT SAVE IT WITH 20 PIECES OF IRON WITH 70 CM THICKNESS, THAT IS VERY COSTLY.

 

[insburak355]

Re: BASIC WITH TROPHY GEOMETRY

 

[doruk9261]

1. Solution- When we solve it with a semi-rigid diaphragm, if we include the floors in the calculation, the problem disappears. 60 cm of foundation is sufficient. Rebar diameters are fi18. 2. Solution-If there is no obstacle, you can make a raft with beams. It can be done as I did. Best regards. Good work.

 

[NYILMAZ]

With 60-65 cm, the base can be passed with fi16/20. Only at one point do I need to increase the additional reinforcement. But this is what I did. (first of all, choose 16 reinforcement in reinforcement selection) Then, as far as I can see, the rest of the building is open except for one facade. Then there seems to be nothing preventing you from getting consoles from the raft. I made 1 m console each. Thus, it seems that there is no problem. I would also particularly recommend the semi-rigid diaphragm solution for such structures. If you solve a semi-rigid diaphragm, you can solve it with fi 16 /20 with 60 cm height without any problems. But the most important thing is that your system is not settled yet. The relative storey drift is too much. You have to fix it. You should make the system more rigid. Afterwards, column beam connection errors etc. If you fix them first, I think other problems will be solved. Besides: Enter stairs to the system or add their loads. You can reduce the wall and floor loads in the attic. Adding curtains to the system will solve your problems. (eg: a curtain instead of s14 s19, U curtains around the elevator, etc.)

 

[NYILMAZ]

....... 2.Solution-If there is no obstacle, you can make a raft with beams. It can be done as I did in the appendix. Best regards. Good work.

Dear Doruk9261, I think the answer at the same time We wrote it. I saw your answer after I wrote it. So I felt the need to correct it. The beam slab data entry as you showed is definitely a wrong method In this way, the effects of the columns that do not step on the beam and directly step on the floor are not calculated. If you examine the basic results in the analysis, you will see this. Be careful. Do not enter data in this way. If the rafter with beams is to be solved, beams must be defined under all columns. I wish you a good work.

 

[doruk9261]

Hello, Mr. Nedim, I have never solved a rafter raft before, but in foundations that have a punching problem, especially in adjacent buildings, the stapling problem is solved by throwing perimeter beams. I've seen this practice a lot. I am not at the computer right now, but at night, I will do the fundamental and raft fundamental analyzes separately and see if the effects occur. Best regards. Good work.

 

[insburak355]

Thank you very much for your answers. FLOOR SHIFT IS OUT. IS THERE NO OTHER SOLUTION OTHER THAN MAKING CURTAIN WALLS ON EVERY FLOOR?

 

[Levent Özpak]

....2.Solution-If there is no obstacle, you can make a raft with beams. It can be done as I did in the appendix. Best regards. Good work.

Hello, as Mr. Nedim said, in the picture you added The foundation system is definitely wrong in terms of program data entry. In this way, the effect of the columns sitting on the raft slab in the foundation design is not taken into account on the raft. On the raft-free raft foundation, the borders of the raft slab should be formed with the slab edge, continuous foundation should not be used. In the rafter raft foundation system, all columns and walls should be connected to each other with continuous foundation , raft slab should be placed in the intervening cells.In addition, the superstructure interactive solution is foreseen in the beamless raft foundation system in the program.Good work

 

[NYILMAZ]

thank you very much for your answers, it helped in some places, but you moved the mat up to the contour lines. It's almost finished, BUT, ALL COLUMNS AND BEAMERS ARE RELATED TO THE FOUNDATION, EVEN A RELATIVE FLOOR DEPLOYMENT IS THERE IS NO OTHER SOLUTION OTHER THAN MAKING CURTAIN WALLS ON EVERY FLOOR?

Looking at the basement floor plan of your building, I see that at least a cantilever can be built on the bottom side, at least 50 cm to the road sections. If there is, consoles can be built. This would also be of great benefit. You will open it when you say excavation and work share, there is a creek on one side. I do not know how the municipality will look, but it can give a console for the foundation on the ground below the road level. Anyway, but what I really don't understand is ]"I saved the raft by bracing " .. how do you do that? I wondered. If it is as mentioned above, we say it again and again that it is wrong... It is also a bit strange that you say that the project is finished and that there is a relative floor offset on each floor. This relative story drift is a much more serious problem than your underlying problem. If you do not want to put curtains, you will have to enlarge the columns and beams, and perhaps more importantly, change their geometry. This means that you still haven't solved your project, maybe you're back to the beginning.