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Spikes in Moment

Question:

Why is there spikes in the negative moment graph?


Answer:
 
Good Evening,

The spikes in the negative moment is due to definition of the "lane support negatve moment", as the software applies the AASHTO clause 3.6.1.3.1 for negative moments is calculated only at the nodes. The bending moment calculation for the element is calculated for 5 points that is at i , 1/4, 2/4, 3/4 and j end but the magnified moment that would appear due to lane suuport negative moment is calcualted only at the i and j ends. Thus at those location we see the spike in moments  and not in the intermediate location.

Hope this helps!

Kindly let us know if further assistance is required.

Regards
B Swapnil Agarwal
Technical Support Engineer
Global Technical Center
Creation date: 10/18/2019 7:15 AM (Swapnil)      Updated: 10/18/2019 4:48 PM (Swapnil)
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