Download GTSTRUDL Version 31

GT STRUDL
Design Prerelease Features
A value of 0 indicates the 'K' geometry with a gap. An integer 0 initiates a
computation of the minimum brace separation distance based on the input
chord/brace geometry. When explicit classification is used and the chord data are
input with the general form, the value 0 may not be input. Brace separation values
can be input directly by the user entering a positive decimal number. Negative
decimal values will result in the joint configuration being treated as overlapped. The
procedure used by GTSTRUDL to compute the minimum brace separation distance
assumes that all brace members and the chord member lie in the same plane. For
automatic classification, the default tolerance for braces considered in one plane is
±10 degrees by default. Furthermore, the braces are assumed to lie on the same side
of the chord. Therefore, if you choose to let the system determine the overlap status
of a joint and you are classifying joints explicitly, be certain to group the brace list
so that the above criteria are met.
The following items describe the specific implications that various OVERLAP
option values have on the gap factor, Qg, which is computed only when the punching
shear check is based on the APIWSD21 code:
1.
When an exact value -1 (default) is specified for the OVERLAP option,
the gap factor, Qg, is set equal to 1.0. This will result in a conservative
punching shear check.
2.
An exact value of 0 for the OVERLAP parameter initiates the gap
computation for the ‘K’ joint geometry, as indicated above, which is
valid only when the CHORDS FOR PUNCHING SHEAR AUTOMATIC
command (Section 4.3.2) is specified. According to this procedure, if an
actual overlap is detected between two braces, the overlap distance is not
computed, a value of -1 is automatically set for the OVERLAP option,
and Qg is computed according to Item 1 above. If an actual gap, or
positive overlap, is detected, the gap distance is computed and used
directly in the computation of Qg.
3.
A positive or negative decimal value directly specified for the OVERLAP option indicates an actual gap or overlap distance respectively,
which is used directly in the computation of Qg.
4.
Note that the exact values of 0 and -1 are reserved options of the
OVERLAP parameter as described in items 1 and 2 above.
5.2 - 7