Unformatted text preview: 27,777.77 in-lb Geometric Properties
a = 50 in
Iy = 20 in4
h/2 = 3.93597 in Loading
P = -1000.0 lb (Load Step #1)
P = -1388.8 lb (Load Step #2)
P = -1390.0 lb (Load Step #3) Ky = 1 x 1012 lb/in ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. 1–89 VM36 Analysis Assumptions and Modeling Notes
The load required for Mc=ML (the limiting, or fully plastic bending moment) is calculated to be 1000 lbs. From
the reference, the second plastic hinge develops at B when PL = 2.5ML/a = 1388.88 lb. The beam area is not necessary for this loading and is assumed to be 1.0. The beam half height, h/2, is input as a BEAM4 real constant.
Ky is arbitrarily selected to be a large value (1 x 1012) to minimize the elastic effect of the hinge.
Combination elements are used as breakaway hinge connections, which slide above the ML value. An extra set
of these elements are defined in parallel with an arbitrary low stiffness and a large value of real constant FSLIDE
to maintain solution stability af...
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