how do i define displacement in plaxis 3d? also what does the model boundary? and Do I need to define surface from 4 faces? Thank you.
Displacements are defined using either point or line or surface displacements.
The different uses of prescribed displacements are explained in this video:https://communities.bentley.com/products/geotech-analysis/w/plaxis-soilvision-wiki/45865/prescribed-displacements
Thank you for your answer but i need to know hot calculates model boundary? xmax xmin ymax ymin.My aim is to define the displacement created by the forces from the earthquake to the model.
Dear Burak,
There are guidelines in literature for determining the model boundaries. It depends on the soil behaviour, project type, analysis type and othe criteria. For seismic analysis the boundary generally have to be far away from the project area; in what is referred to as the free field.
With kind regards,
Dennis Waterman