Hybrid system error

[celikbey]

Hello there. In the attached project, the 2nd basement is completely curtained, and the 1st basement has curtains on 3 facades. I have only 1 column in the X direction the others are curtains. I chose X direction R: 6, Y direction: 4. X direction alpha s: A value like 0.22 is obtained. It should have been around 90%. Can you review and come back? What's wrong? Have a nice day...

 

[NYILMAZ]

Your data entry regarding the carrier system behavior coefficient is incorrect. Maybe you meant upper rigid basement floor number. You wanted to enter it differently. But this data entry is wrong. The coefficient of behavior of the structural system is not entered according to the floors. It is not independent of the floor, it is related to the whole system. The behavior of the whole system in the x direction or the behavior of the whole system in the y direction is taken into account.

 

[Levent Özpak]

Hello. A value like alpha s: 0.22. It should have been around 90%. Could you examine it and come back? What's wrong? Good day...[/quote] Hello, There are perimeter curtains in the 1st basement floor of the project and these curtains are marked as basement curtains. Walls marked as basement curtains in the program are not included in the alfaS control Notes: *It is recommended to model the basement perimeter curtains as shells *Ductility level cannot be selected as Mixed in one direction and Normal in the other direction.You can review TDY 2007 item 2.5.1.2. Good work

 

[celikbey]

Your data entry regarding the structural behavior coefficient is incorrect. Maybe you meant the upper rigid basement floor number. You wanted to enter it differently. But this data entry is incorrect. The carrier system behavior coefficient is not entered according to floors. It is not independent either, it is related to the whole system. The behavior of the whole system in the x direction or the behavior of the whole in the y direction is taken into account.

Hello. You understood my question from the way my first message came in. I know very well that the rigid board floor and the behavior coefficient are different things. That's why I said that I only have 1 column in the X direction and the rest is curtains, and I said R: 6. I hope I could explain. Thank you for your attention, too. Mr. Levent, I'm also reviewing what you wrote. The relevant article you gave me is about the Earthquake load reduction coefficient, that is, not the coefficient that we will enter into the system, but the seismic load reduction coefficient. I think it is related to finding the reduction coefficient that emerges with APs. But I will still investigate. Also, when Levent Bey takes the R value as 4 in both directions and chooses the ductility level as Normal, based on the relevant article you have given, this time he gives the following error: "Normal system has been selected and the ratio of the sum of the wall shear forces to the total base shear force is 0.75' smaller than." and from there, in the "Reason for choosing the R coefficient" table in the Earthquake regulation general report in your program, your arrows direct me to the mixed system selection. And as I said, the basement curtain is the curtains I gave, but the alpha s value is 0.22 in the X direction. Isn't it strange? Let me also ask, is the entire curtain part seen as 240 cm in horizontal direction on my L-type curtain named P3 counted as a curtain? I am waiting for your answers. In addition, if there are points in the project that I entered wrong, could you process the correct version of the project and send it to me? Thank you.

 

[k.yalvaç]

We would be glad if you could inform us as a result of your research... Good work... KEMAL YALVAÇ

 

[Levent Özpak]

The part we entered in our program is the Structural System Behavior Coefficient R. The relevant item you gave me is about the Earthquake load reduction coefficient. That is, it is not about the coefficient we enter into the system, but about finding the reduction coefficient that comes out with calculations. But I will research it anyway.

Mr. Çelikbey, the regulation article I refer to is related to the fact that the ductility level cannot be chosen mixed in one direction and normal in the other direction. I am quoting the article.

Also, Mr. Levent is yours Based on the relevant item you gave, taking R as 4 in both directions and choosing Normal for the ductility level, this time it gives the following error: "Normal system has been selected and the ratio of the sum of the wall shear forces to the total base shear force is less than 0.75." and from there, in the "Reason for choosing the R coefficient" table in the Earthquake regulation general report in your program, your arrows direct me to the mixed system selection.

The table under the heading R coefficient selection reason directs you not only to the mixed system, but also to the highly ductile system.

And as I said, the basement curtain is the curtains I gave, but the alpha s value is 0.22 in the X direction. Isn't it strange?

Even though the curtains are modeled as the basement, they receive shear force in proportion to their stiffness. Since they are not included, it is normal for the AlfaS value to be 0.22 on this floor. If you want, you can decide whether to solve the mixed system, ignoring the warning given by the program, according to the AlfaS value on the next floor. The AlphaS rates for each floor are printed in the Earthquake Regulation general report.

Let me also ask this, is the entire curtain part seen as 240 cm in horizontal direction on my L-type curtain named P3 is taken into account as a curtain?

The shear force of polygon columns is not included in the AlfaS control. If it is desired to be included, the P column can be marked in the Column reinforced concrete dialog. Good work

 

[unver]

Dear celikbey MY SUGGESTIONS: After these briefings: -The coefficient of the carrier system in both directions is 7 -The ductility level is high in both directions -make the concrete value C25 Correct the (B) errors too. (DO NOT USE REINFORCEMENT FIXING IN NEW PROJECTS.) -- increase the width of the carrier ribs with large spans, -- let the rib beams center the columns, --Check the load of the rightmost ladder on the ground floor ceiling, mezzanine beam can be placed under K29 . Take it easy Unver ÖZCAN

 

[NYILMAZ]

Hello. You understood my question from the way my sentence came in my first message. I know very well that the rigid board floor and the behavior coefficient are different things. Therefore, I stated that I only have 1 column in the X direction and the rest are curtains R: 6 I hope I could explain. Thank you also for your interest.

Dear celikbey, First of all, I'm sorry if I offended you. I felt like I felt a little angry with the words interspersed between the lines of your article. It was not my intention to question your knowledge or make you angry. I looked at the carrier system. To be honest. It never occurred to me to look at it from your point of view.Suddenly, the table in the earthquake regulations came to my mind.When I looked at your project, I saw that only 5 of the 17 vertical carriers were curtains and they were on two axis (except for the elevator curtain).[ I thought /color] directly, "It doesn't mention anything about the R coefficient, it was written by mistake when I wrote it." Bod For some reason, this thought was reinforced when I talked about the Greek floor curtains. :?: So we apologize for the inconvenience caused to the environment. :!: :?: