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What is the best way to model two welded beams parallel to each other?

Answer

The following options are available for modeling two welded bars parallel to each other (Figure 1):


1) Connection of the two members by means of rigid members at specific spacings:

  • Division of Members at Specific Distances: Right-click corresponding members → "Divide Member"
  • Connection of newly created nodes by rigid members


2) Decomposition of a member into a surface (only possible in RFEM):

  • Right-click one of the members → "Generate Surfaces from Member"
  • Displacement of the other member into a plane of the newly created surfaces so that the line of the displaced member is integrated into the corresponding surface (check: "Edit Surface" dialog box → "Integrated" tab
  • Definition of a member eccentricity so that the original position is restored ("Edit member" → "Settings" tab → "New member eccentricity" → here in practice: "Relative offset")
  • If the member that has now been split into surfaces is designed in an add-on module, you can simply define a result beam here


3) Use the single program SHAPE-THIN to model and design individual cross-sections

Keywords

Parallel Welded Double Members

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RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD
RSTAB Main Program
RSTAB 8.xx

Main Program

The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions

Price of First License
2,550.00 USD
Cross-Sections Thin-Walled
SHAPE THIN 9.xx

Stand-Alone Program

Properties and stresses of thin-walled and cold-formed cross-sections

Price of First License
1,300.00 USD