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## Robot Structural Analysis

Contributor
Posts: 15
Registered: ‎06-30-2012

# Help For Beginners

866 Views, 10 Replies
09-22-2012 04:44 AM

Hi Friends, I am a new user of Robot. I am finding too many problems here. I hope somebody can help.

1.When I want to draw a floor slab, if I draw differently (clockwise or anti-clockwise, starting from longer beam or shorter beam side) it shows different maps in stresses and moments. So what is the actual method? How should I draw?

2. There are too many options. Floor, Panel, Cladding ... Inside Floor there are Shell, Deck Slab (One way), ... If I want to draw a solid floor salb which one I should use? And when I should use the others?

3. How can I design T-Beams? I mean when I set code parameters, it says that T-Beam was considered, but doesn't show any reinforcement for flanges, only shows for webs.

4. Some times when designing required reinforcement in beams, it says that for certain  beam there is "insufficient capacity against shear". Why is it happening and how to solve it? (In the attachment beam no. 33 and 66)

5. In the attached file, I drew the edge columns aligning centers, without eccentricity. But as we know in reality, it will have to be constructed with 10 cm eccentricity (ei between the centers of col. no. 5 and 17). So how should I actually draw? If I draw with eccentricity, when designing the beams, it shows a message "Segmets of the length less than 10 cm have been removed, Transfer of the RC Element has been completed". What does this mean? Is this a problem? How to solve this?

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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-24-2012 05:11 AM in reply to: toha_mh
1.When I want to draw a floor slab, if I draw differently (clockwise or anti-clockwise, starting from longer beam or shorter beam side) it shows different maps in stresses and moments. So what is the actual method? How should I draw?

Your choice. For results presentation please set correct  \ desired Direction

http://docs.autodesk.com/RSA/2013/ENU/filesROBOT/GUID-16AA1074-A4F2-4EAA-A456-86AF1F396341.htm

Rafal Gaweda
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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-24-2012 05:19 AM in reply to: toha_mh

2. There are too many options. Floor, Panel, Cladding ... Inside Floor there are Shell, Deck Slab (One way), ... If I want to draw a solid floor salb which one I should use? And when I should use the others?

Floor = slab :

http://docs.autodesk.com/RSA/2013/ENU/filesROBOT/GUID-316A5523-11CC-4857-B410-649A36B19A09.htm

in short : flat horizontal panel

If you want to use such panel \ floor in desing or get results use Shell.

http://docs.autodesk.com/RSA/2013/ENU/index.html?url=filesROBOT/GUID-13A7E8C9-AAB0-44CE-8C48-DC9BB38...

Rafal Gaweda
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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-24-2012 06:26 AM in reply to: toha_mh

3. How can I design T-Beams? I mean when I set code parameters, it says that T-Beam was considered, but doesn't show any reinforcement for flanges, only shows for webs.

Additional settings you have to use:

:

Rafal Gaweda
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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-24-2012 07:28 AM in reply to: toha_mh

5. In the attached file, I drew the edge columns aligning centers, without eccentricity. But as we know in reality, it will have to be constructed with 10 cm eccentricity (ei between the centers of col. no. 5 and 17). So how should I actually draw?

Leave it as it is or use offsets.

But before take a look at these threads;

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Consequence-of-axis-position-offset-excentre...

Rafal Gaweda
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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-25-2012 07:04 AM in reply to: toha_mh

4. Some times when designing required reinforcement in beams, it says that for certain  beam there is "insufficient capacity against shear". Why is it happening and how to solve it? (In the attachment beam no. 33 and 66)

It is caused by torsion. Turn it off.

Developers will check tosion design.

Rafal Gaweda
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Product Support
Posts: 5,587
Registered: ‎04-26-2010

# Re: Help For Beginners

09-26-2012 05:30 AM in reply to: Rafal.Gaweda

4. Some times when designing required reinforcement in beams, it says that for certain  beam there is "insufficient capacity against shear". Why is it happening and how to solve it? (In the attachment beam no. 33 and 66)

It is caused by torsion. Turn it off.

Developers will check tosion design.

Please check your \ Robot calculations (below). Let us know if there is any bug in Robot.

Rafal Gaweda
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Contributor
Posts: 15
Registered: ‎06-30-2012

# Re: Help For Beginners

10-02-2012 03:51 AM in reply to: Rafal.Gaweda

Thnx a lot. Now it's clear to me.

But can't ROBOT design ribbed (hollow block slab)? I see there is a tab called othographic, but even when I use that, it doesn't show the ribs in the panel thickness, or doesn't design the ribs.

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Product Support
Posts: 5,111
Registered: ‎12-17-2010

# Re: Help For Beginners

10-02-2012 03:56 AM in reply to: toha_mh
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Contributor
Posts: 15
Registered: ‎06-30-2012

# Re: Help For Beginners

10-07-2012 01:59 AM in reply to: Rafal.Gaweda

@ RG_Adsk, how can I turn tortion off, please?

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