Cannot get bridge to analyze properly.

Question:

This bridge is entirely a reinforced concrete bridge, and I need to perform a load rating for it, but I cannot even get the structural analysis results. I have modeled this bridge according to its plans. I have all the required boundaries set, deck in place, loading patterns, etc., and I get warning messages and no structural analysis results.

I have attached all applicable files in regards to this particular bridge.

Answer:

Hello,

Thank you for writing to us!
Since the main issue was about rating, first of all, kindly note that in midas Civil, rating is possible only for PSC & Steel Composite bridges.
So, if it is intended to rate a RC bridge, tendons with negligible properties could be assigned and then PSC rating could be done for this.  However, kindly note that this is a workaround.
As for this particular model, actually the modelling isn't correct.  The supports are provided at only one end and the moment is released.  Thus it is unstable.  I just assigned support at other end and now it is being anlyzed.
Also, the material properties are not correct.  2500ksi is way too much compressive force for concrete.  Even steel is around 60ksi.  I believe that could be due to mistake with units.  It should be 2.5ksi.
The modified model file is attached for review.  Also, I'd recommend going through our training videos on northamerica.midasuser.com for better using midas Civil.
Kindly let us know if further assistance would be required.

Regards,
Nandeep
Technical Manager, MIDAS
Creation date: 10/17/2018 9:57 PM (dklee@midasit.com)      Updated: 10/18/2018 7:28 AM (dklee@midasit.com)
Files   
Center Drive Bridge.mcb
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Center Drive Bridge.mcb
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Center Drive Bridge.wzd
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Curb Girder.dxf
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Curb Girder.sec
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Island Flanking Girder.dxf
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Island Flanking Girder.sec
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Main Girder.dxf
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Main Girder.sec
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Sidewalk Flanking Girder.dxf
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Sidewalk Flanking Girder.sec
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