Can't beat the hack in the basement

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insmuhturker

New Member
I'm working on the dormitory project, no matter what I do, I can't beat the cut in the basement floor. I added curtains to increase the rigidity. The same problem still persists, please help. Also, we need to build the foundation in one piece. Even if we increase the floor area, we get negative ground safety.
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Re: shear force problem Hello; 1- You have mistakes in the model. At first glance, you modeled a column on the curtain that you modeled as a shell in the basement. In other words, these columns in the size of a curtain on an upper floor are not connected to the curtain on the lower floor, and load transfer is not provided. Define these columns with the panel command. 2- You selected the option "Apply ductile structure controls to rigid floors". In this case, you are trying to meet the horizontal forces, which come from the equivalent earthquake load calculation and are higher than the dynamic analysis, with elements with high ductility in the basement. You can cancel this option. 3- You said to use earthquake loads in the calculation of soil safety stress, but you did not use your 50% increase right. If your floor is not group D, use this right. 4- I did not check, but check if your mod number is sufficient, increase it if necessary. Sent via iPhone using Tapatalk
 
Re: shear force problem I couldn't understand the 1st item. My column dimensions are 30/100 bidet 30/150, all the others are pitch-defined. When I remove the 2nd item, I have to skip the tdy related items. Thank you for your attention. Sent via iPhone using Tapatalk
 
Re: shear force problem The architecture of the project would have been better interpreted. I can say two things about the ground tension: In your model, you have taken the raft height of 120 cm. That's too much; 1- There are negative ground stresses, albeit in small values, because there are negative ground stresses (-3.51) 2- If you increase the maximum ground tension by 30.25, that is, 50% depending on the soil group, and with a little adjustment, you will overcome the problem. When we solve the same structure with 70-75 cm raft, the maximum ground stresses occur around 20-23. But I think that the foundation of such a long structure cannot be poured at once. Depending on the dilatation, the foundation system is also made. Of course, it is difficult to interpret because it is not an architectural project, but the floors are heavy, thick and their load is always 0.500. These will affect the operation of the system and accordingly, of course, the foundation. Curtains are always chosen in the x direction, while the structure is weaker in the Y direction. In all three dilatations in your structure, the centers of rigidity and mass have moved away from each other. You can use pitch distributions more accurately. In addition, the parts in both head parts (possibly fire stairs) are disconnected from the building. In the meantime, there is an area like a corridor. It must be tied with beams. This problem also appears in the middle dilatation. As such, you had to make thick flooring and overloading. Define columns P87 and P89 (walls) as curtain objects and model them as shells. Moreover, these columns are modeled as curtains in the basement. You can define S35 and S36 columns as curtains and bring them to curtain size. (10 cm left) If the attic will not be used, you can reduce the live loads of the floor and remove the wall loads of the beams. Make a semi-rigid diaphragm solution.
 
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