Relative floor offset

M

merves11

New Member
Hello there. The project is 7 storeys, the relative storey drift in the x direction is too high no matter what I do, I get the error "Increase system rigidity" I changed it to concrete class and couldn't figure it out. I will be glad if you help
 
Hello there; The Ao value defined under Analysis Settings / TDY Options / Earthquake Zone is marked and entered as 0.51. Is this cookie within your knowledge? For the 1st degree earthquake zone, this value is 0.40 and you don't need to define it, just select the earthquake zone. Best regards.
 
yes it is, but where I am it is taken as 0.51. in this way in the studies. I have to correct accordingly. do you have any other suggestions
 
Hello merves11
"merves11":3rqbmc8t" said:
yes it is, but it is taken as 0.51 where I am. This is the way in the studies. I have to make corrections accordingly. Do you have any other suggestions
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How to get these study values given to you, Can you scan and share why you need to do such a thing and if you have a document, Unver ÖZCAN
 
As I know because I am close, Düzce municipality wants the Ao value as 0.51. I think it has something to do with the acceleration records of the November 12, 99 earthquake. Soil studies come in this way. In our case, the limit of the relative floor drifts was lowered from 0.02 to 0.01 by the decision of the city council. Relative story displacement parameter is the first value that measures the building stiffness. Even if Ao = 0.51, the relative floor drifts greater than 2 percent indicate that a weak building has been designed. If you have already read the draft of the new earthquake code, the upper floor displacement limit is reduced to 0.008 in cases where infill walls are built together with the building. In cases where infill walls are made with dilatation, the upper limit of relative translation is reduced to 0.016. Moreover, when the parameters in the new regulation such as the element effective stiffness and the coefficient of closeness to the fault come into play, we will have to design much more rigid buildings than now. Best Regards, Jesus SAYI
 
ground studies are not with me right now, but as I said, they want 0.51. I completely changed the design. thank you
 
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