Total Displacement of Result Combinations

Technical Article on the Topic Structural Analysis Using Dlubal Software

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Technical Article

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By means of result combinations, it is possible to create, among others, the envelopes for internal forces and deformations. Thus, the user can quickly find the maxima and minima for the later design.

However, special attention should be paid to the display of the global total displacement u. This is determined using the following formula:

u = √(uX2 + uY2 + uZ2)

The related resulting deformation for load cases and load combinations is displayed accordingly.

Together with the result combinations, also the maximum deformation components of the directions are calculated. This results in a superposition of deformations from different load cases. The result is shown in the third picture.

The result of the total displacement of the RC does not reflect the overall displacement of the individual load cases nor their qualitative distributions. For example, if you consider the calculation of the maximum total displacement u, max = 220 mm, it turns out that it is determined with the maximum deformation in the Z-direction from load case 1 and the maximum deformation in the Y-direction from load case 2.

The total deformation of a structure should therefore be evaluated in load cases or load combinations.

Author

Dipl.-Ing. (FH) Lukas Sühnel

Dipl.-Ing. (FH) Lukas Sühnel

Product Engineering & Customer Support

Mr. Sühnel is responsible for the quality assurance of RSTAB, he also participates in product development and provides technical support for our customers.

Keywords

Deformation Total displacement Result combination

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  • Updated 29 April 2021

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RFEM
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
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