I have generated member loads from area loads by plane horizontally to the level of a multistory frame. Each cell contains a truss member as a diagonal. In spite of the fact that the diagonal has been excluded from the loading, the member load distribution is linear in different directions after being separated on both posts.

What is the reason and what should be done so that the same member load is applied to both posts?

Answer

In case that the corresponding members are selected in the "Without Effect To" checkbox, no load will be applied accordingly at this place.

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

There are two options for obtaining symmetrical or constant diagrams of the member loads:

  • Selecting the load distribution type "Constant" for a uniform distribution (see Figure 02)
  • Selecting the option "Do Not Use Any of the Unloaded Members for Cell Generation" to obtain only a symmetric distribution (see Figure 03)

Keywords

Member load Load generation Load generator Member load distribution Constant Linear

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