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Example Description

This example uses a cantilever beam to test this model end offsets. In this model, end offsets may be non-rigid, partially rigid, or fully rigid. The rigidity of the offset is specified by a rigid zone factor. This factor specifies the fraction of the end offset length, measured from the frame element end, that is assumed to be infinitely rigid. The remainder of the end offset, if any, is assumed to have the same flexibility as the beam.
Four models are created in this example. The first has no end offset, the second through fourth have an end offset with 0%, 50% and 100% rigidity, respectively. For each model the vertical displacement at the free end of the cantilever is compared with independent hand calculated results.
Important Note: Bending and shear deformations are included in the analyses for this example.



Tested Features

  •  The use of end offsets in frames, including

               Non-rigid offsets

               Partially rigid offsets

               Fully rigid offsets

  •  The effect of end offsets on the frame static analysis results



App

Object Link: https://openbrim.org/objidmco6exeqjsq2lbi6x09p.project

Library

Object Link: https://openbrim.org/objidl5ggn5o0mkpq6tyl79b9h.libobj

Model
Rigid Zone Factor
Output Parameter
OpenBrIM
SAP2000
Independent

Percent Difference

(SAP2000 vs Independent)

Percent Difference

(OpenBrIM vs Independent)

AN.A.Uz (free end) in-0.39951-0.39951-0.399510%0%
D1.0Uz (free end) in-0.35197-0.35197-0.351970%0%
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