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Distinguished Contributor
Ronald286
Posts: 122
Registered: ‎05-20-2013

Stiffness factor for slabs

260 Views, 6 Replies
09-02-2013 06:03 AM

Hello, support.

Please, can you explain how program calculates the stiffness factor in 'Required reinforcement' tab. For example, does this program takes into account the creep of concrete? Wiki help says that program takes into account the reological properties of the materials, but after some trials it looks for me, that creep coefficient is neglected. Also, in codes for concrete you can use different stress-strain diagrams to define elastic modulus of the concrete. Here I can't see the possibility to choose something similiar. So, methods of calculation of these stiffness factors are not clear for me.

Sorry for my bad English.

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Product Support
Rafal.Gaweda
Posts: 4,935
Registered: ‎04-26-2010

Re: Stiffness factor for slabs

09-02-2013 06:30 AM in reply to: Ronald286

Stiffeness factor calculations depend on code.

Creep coeff is taken into account.



Rafal Gaweda
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Distinguished Contributor
Ronald286
Posts: 122
Registered: ‎05-20-2013

Re: Stiffness factor for slabs

09-02-2013 07:15 AM in reply to: Rafal.Gaweda
I'm doing my calculations according СП 63.13330.2012. In report for expertisa I want to use the stiffness factors(instead of non-linear calulation I just want to reduce the stiffness of some critical areas according these factors), but I need to describe how program calculates it. According СП 63.13330.2012 you can use two or three linear stress-strain diagram for definition of elastic module of the concrete. Which diagram use robot in calculations of stiffness factors according СП 63.13330.2012?
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Distinguished Contributor
Ronald286
Posts: 122
Registered: ‎05-20-2013

Re: Stiffness factor for slabs

09-05-2013 03:24 AM in reply to: Ronald286

Dear support, please, let me know if you don't have an answer for my question and if there are no information or any examples how robot calcualtes the stiffness factors. I'll not spent my time and i'll try to make hand calculations.

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Product Support
Rafal.Gaweda
Posts: 4,935
Registered: ‎04-26-2010

Re: Stiffness factor for slabs

09-05-2013 03:31 AM in reply to: Ronald286

Still waiting for developers answer.

Sorry



Rafal Gaweda
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Product Support
Rafal.Gaweda
Posts: 4,935
Registered: ‎04-26-2010

Re: Stiffness factor for slabs

09-09-2013 12:33 AM in reply to: Rafal.Gaweda

Answers in attached doc



Rafal Gaweda
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Distinguished Contributor
Ronald286
Posts: 122
Registered: ‎05-20-2013

Re: Stiffness factor for slabs

09-09-2013 04:22 AM in reply to: Rafal.Gaweda

Thanks!

When i'll have time, i'll try to make some tests.

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