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Active Contributor
Posts: 47
Registered: ‎05-14-2012

Seismic example

412 Views, 7 Replies
06-05-2012 03:59 AM

Hi,

I am trying to solve the above example ( attachment).

Seismic analysis consist of EC 8, acceleration coeff.0.35, zone B and behavior coeff. 2 damping 5%

the modal analysis and deformations are correct, but the reactions for the seismic case do not correspond to the example.

I don't know where the mistake is?

 

Thank you

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Active Contributor
jenyzosin
Posts: 30
Registered: ‎04-27-2009

Re: Seismic example

06-05-2012 05:35 AM in reply to: alb2

Hello,

You need to put the combination sign "1" (in your case) and then you gone have the right reactions.

 

There's a fine line between genius and insanity. I have erased this line - O.L.
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Product Support
Posts: 4,445
Registered: ‎04-26-2010

Re: Seismic example

06-05-2012 05:42 AM in reply to: alb2

Sax is different in your program than in robot specrtal coeff (for both modes).

Have you checked code book yet?



Rafal Gaweda
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Active Contributor
Posts: 47
Registered: ‎05-14-2012

Re: Seismic example

06-05-2012 05:50 AM in reply to: Rafal.Gaweda

Can you please be more specific?

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Product Support
Posts: 4,445
Registered: ‎04-26-2010

Re: Seismic example

06-05-2012 06:17 AM in reply to: alb2

Can you please be more specific?


Have you checked with EC 8 code book the way \ correctness of Sax calculations for given data for each mode?
EC8,  Part 1,  3.2.2.2 Horizontal elastic response spectrum -> calculations of Se(T)



Rafal Gaweda
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Active Contributor
Posts: 47
Registered: ‎05-14-2012

Re: Seismic example

06-05-2012 07:43 AM in reply to: Rafal.Gaweda

In case Sax is not correct, how can it be change for each mode?

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Product Support
Posts: 4,445
Registered: ‎04-26-2010

Re: Seismic example

06-05-2012 07:58 AM in reply to: alb2

1. Case 2 is model case so N/A results are correct

2. These values are calculated by program. Not possible to change thm in Robot. Maybe in your program...



Rafal Gaweda
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Active Contributor
Posts: 47
Registered: ‎05-14-2012

Re: Seismic example

06-05-2012 08:14 AM in reply to: Rafal.Gaweda

Probably will be a small difference in spectra values between the 2 program. I am guessing

Thank you anyway for your support

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