Need to the support

Hi friends
I need to make a two simples model
The first using 2007 code with spectrum curve
The second using 2018 spectrum curve
And analysis them
The Auto lateral forces EX EY should be
Same in both models
But i did it but unfortunately
I wasn't same

Please load both of your model first and you will get support.

Hi Ismail
I appreciate your support
kindly check out the link
i attached both model
For 2007 parameters "
use A0=0.1
R=4
Normal ductility
response spectrum use
For 2018 parameters "
ss,s1 as interred inside model
R=4
Normal ductility
response spectrum use
-----------------------------------
use vertical seismic effect and the load combinations should be same in both
the lateral forces Fx and Fy for EX AND EY Should be same

thank sagain

nurgulkaya:10c0mo60' Alıntı:

Hi ammer;

We use effective stiffness parameters automatically for TBDY 2018. But in tdy 2007 there is no rule to use crack section properties. So ın 2007 all effective stiffenes parameters are 1. You should change for column 0.70, beam 0.35 and shearwalls 0.5 for TDY 2007 model.

Please open the model ı sent you before and enter the TBDY 2018 parameters. Then analyse it and export spectrum. After that you should save the model diffrent name and define the exported spectra and change the code as TDY 2007. After that, you should enter the effective stiffness parameter for column, beam and shearwall. And analyse it. If you stiil have problem after these steps, please send both models, and ı'll try to help you.

Genişletmek için tıkla ...

hello
thanks for your efforts
would you please change the parameters as you mentioned for both models?
then upload them
i will try to understand the change properly

Hello;

In TBDY 2018 regulation, seismic forces are determined according to each element by dynamic analysis. Story forces are only used to determine irregularities. On the contrary, in 2007 regulation, seismic forces are determined according to stories with 'apply static lateral story forces calculated using modal combination'. And this method is different than 2018 dynamic analysis.

In 2018 Dynamic analysis, we use dynamic procedure. You can view the procedure :



If you apply the changes described below, you can see element forces are same or nearly same. And also, ıf you sum up the story forces, you can see they are nearly same.

1- Choose single modal analysis at 2018



2- Write Ao=1.0, I=1.0 R=1.0 at 2007



3- Export the 2018 spectrum to 2007


4- Write the column effective stiffeness is 0.7, beam =0.35 shearwall=0.5

5- Run both model.

After the analysis, you see column results:



Story forces: the difference between 2 regulation's story force = 3 %



Download the models :

Reasons of Differences:

1- In 2007, we don't put all the effective stiffness parameters to the shearwalls. And your building includes a great number of shearwalls.
2- Beacuse of the shearwall stifenesses, modal periods are different, so element seismic forces are little different.
3- In 2018, we use dynamic analysis and calculate seismic forces up to every single element. But ın 2007, we calculate seismic forces and distribute these forces. So main reason is that we use 2 different approach between 2007 and 2018.

many many thanks nurgul
I'M USING IDECAD STRUCTURAL CONCRETE+STEEL ENGLISH V 10.2
I GOT THIS MESSAGE AND DID NOT OPEN

Hello;

v10.20:

çok teşekkürler
i was very clear