FAQ 003196 | I have generated member loads from area loads via planes horizontal to the plane of a multistory frame. Each cell contains a truss as a diagonal. Although the diagonal has been excluded from the load, the member load distribution is linear in different directions after being disconnected on both posts.What is the reason and what should be done to apply the same member load on both posts?

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Question

I have generated member loads from area loads via planes horizontal to the plane of a multistory frame. Each cell contains a truss as a diagonal. Although the diagonal has been excluded from the load, the member load distribution is linear in different directions after being disconnected on both posts.

What is the reason and what should be done to apply the same member load on both posts?

Answer

Once you select the corresponding members in the "Remove influence from" section, there will be no load applied accordingly.

However, the load is still generated while considering these members. In this case, the diagonals are the reason for the antimetric arrangement of the cells subjected to the load. Accordingly, the member load diagrams are linear in the opposite directions (see Figure 01).

Figure 01 - Antimetric Member Load Distribution

There are two options to obtain symmetrical or constant diagrams of the member loads:

  • Select the "Constant" load distribution type for the uniform distribution (see Figure 02).
  • Select the "Do not use any unloaded member for cell generation" option to only obtain the symmetric distribution (see Figure 03).
Figure 02 - Constant Member Load Distribution

Figure 03 - Symmetric Member Load Distribution

Keywords

Dlubal FAQ Member load Load generation Load generator Member load distribution Constant Linear Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal

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  • Updated 02/22/2021

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