New

 [Load] Tab > [Lateral] > [Imperfection] > [Assign Imperfection]

Modify, Delete

 Work Tree [Load] Tab > [Static Load] > [Imperfection Load] > Right-Click > [Modify], [Delete]

Name : Enter the name of Imperfection Load.

Check on ‘Generate Ortho.Direction’ to create load automatically in the perpendicular direction of entered direction value.

Direction : Enter the direction angle of Imperfection Load.

Coefficient : Select Initial Sway Coefficient Name to be applied.

Click  to activate ‘Define Initial Sway Coefficient ‘ dialog.

Static Load Set : Create Imperfection load for the selected Static Load.

Scale Factor : Enter the scale factor for Imperfection Load.

Calculate Imperfection Load

Calculate imperfection load according to sum of axial force of story and distribute based on mass ratio at each point.

Generation of  Imperfection Load

Below diagrams show the generation rule and application example of Imperfection.