/com, For the preintegrated section, generate elements parallel to
/com, the x-axis and offset from the beam with channel section
secn,2
n,1001,,10
*do,i,1,nelem
loc = i*leng/nelem
n,i+1001,loc,10
e,i+1000,i+1001
*enddo
/com,
/com, Load the beams as cantilevers. Fix one end and apply a
/com, transverse load in the z-direction at the free end
d,1,all
f,nelem+1,fz,-100d,1001,all
f,nelem+1001,fz,-100
fini/sol
solve
finish
/post1
/com,
/com, COMPARE RESULTS: All displacments, including warping, compare
/com, well between beam and preintegrated sections
/SHOW,JPEG
prnsol,u
prnsol,rot
prnsol,warp
finish15.6. Managing Cross Section and User Mesh Libraries
Cross section data for common sections such as CHAN and RECT can be stored in cross section libraries.
To create standard cross sections for later use, create one or more cross sections, edit the Jobname.LOG
file, and copy the appropriate SECTYPE,SECDATA, and SECOFFSET commands into a separat e file
with a SECT extension. These predefined cross sections can later be read into a model using the /SECLIB
command (Main Menu> Preprocessor> Sections> Section Library> Import Library).
15.7. Example Lateral Torsional Buckling Analysis
You can use BEAM188 and BEAM189 elements to model not only straightforward beam bending and
shear response but also to model beam response that involves lateral-torsional buckling. To create this
type of model, you will need to create an adequately fine mesh of beam elements. You typically need
to model a single beam member using a series of short beam elements, as shown in Figure 15.4: Lateral-
Torsional Buckling of a Cantilever I-Beam (p. 451).
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential informationBeam Analysis and Cross Sections