How to calculate FEMA hinge parameters?

Question:

Hi,

Do you have more information on how FEMA hinge values on Civil? manual for example? below you can see about 3.99 rad of DY rotation, it looks a lot, how is it calculated? and how to calculate point C?



thanks

regards




Answer:

Hi,

I think you are asking how CP is calculated for the FEMA-type hinge. 
FEMA specifies 0.02 of PLASTIC ROTATION for CP as shown below.



In Civil, the hinge rotation is described as D/DY ( = total rotation / Yield Rotation). 
Total rotation = Yield rotation + plastic rotation.
Yield Rotation = 3.994e-5
Plastic Rotation for CP = 0.02
Therefore, CP = (3.994e-5 + 0.02)/3.994e-5 = 501.7


We can see the exact value of DY by selecting "User Input".
Also, we can give user-defined values by selecting the "User-input"






Regards,
MIDAS TECH SUPPORT


Creation date: 5/20/2021 3:55 PM      Updated: 5/21/2021 8:58 AM
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