Composite Steel Girder Curved Bridge Design

Question:

How can I ignore the slab stiffness in the negative moment region (near the piers) in the FINAL condition?
I'm using method c for creating my model and I did not define the construction staging?

Answer:

Hi,

You can use the 'Section Stiffness Scale Factor' function. In your model, section stiffness scale factor is applied to take into account the creep effect of the concrete slab, which would not be necessary for the negative moment region if you want to ignore the slab stiffness. So, remove the section stiffness scale factor for the negative moment region and define new section stiffness scale factor to ignore the slab stiffness. The factor would be the ratio of the section properties between the 'reinforcement plus steel beam' and the 'slab + steel beam'. It should be manually calculated.


Regards,
DK Lee
Creation date: 11/7/2018 5:46 AM (dklee@midasit.com)      Updated: 11/7/2018 4:16 PM (dklee@midasit.com)
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Superstructure(M&M_Revised).mcb