Hi,
I'm designing a 2-span curved steel tub girder bridge, with 2 girders and composite deck. The design summary shows I am violating AASHTO 6.10.7.3-1, which checks that the PNA is not too far into the web, which can cause ductility issues.
My hand check of the PNA depth matches that determined by another program (MDX). My hand check matches OpenBridge if I make the girders non-composite (set deck f'c = 0 ksi).
I have the deck defined as composite (generic shear studs defined over whole length). Openbridge is correctly treating as composite for other checks. A coworker observed the same problem.
Anyone have the same issue?
Geoff