STAAD.Pro Help

M. To assign inplane rotation behavior to plates

To specify either no inplane rotational stiffness or completely rigid inplane rotational stiffness, use the following procedure.

Typically, the plate element used in STAAD.Pro has a very "soft" in-plane rotational, Mz, stiffness. There may be circumstances where this rotation should be ignored entirely (that is, with zero in-plane rotational stiffness). Alternatively, there may be circumstances where a rigid body rotation is required in plate elements.
  1. Select the plates which will have the same inplane rigidity.
  2. On the Specification ribbon tab, in the Specifications group, select either:

    To… Select this tool…
    ignore the in-plane rotation actions of the plates Plate > Ignore Inplane Rotatoin
    treat the plates as rigid bodies for in-plane rotation Plate > Rigid Inplane Rotatoin
    The Plate Specs dialog opens to the corresponding tab.
    注記: There are no parameters to provide for this plate specification.
  3. Either:
    To… Do the following…
    add the specification to the model and assign to the current plate selection click Assign.
    add the specification to the model for later assignment click Add.
    The dialog closes.