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STAAD Commands and Input Instructions
Section 5
5-256
5.32.3.2 Element Load Specification - Solids
Purpose
Two types of loads can be assigned on the individual faces of solid
elements:
1. A uniform pressure
2. A volumetric type of pressure on a face where the intensity at
one node of the face can be different from that at another
node on the same face. An example of such a load is the
weight of water on the sloping face of a dam. If the dam is
modelled using solids, for the individual elements, the water
height at the lower elevation nodes will be larger than those
at the higher elevation nodes.
The syntax is as follows.
General format:
ELE
MENT LOAD SOLIDS
⎧ GX ⎫
element-list FAC
E i PRE
1
SSURE ⎨ GY ⎬ f
1
f
2
f
3
f
4
⎩
GZ
⎭
Description
The first option above loads the solid by specifying one or more of
the 6 faces to receive pressure.
The PRESSURE may be provided either in GLOBAL (GX, GY,
GZ) directions or in local Z direction (normal to the element). If
the GLOBAL direction is omitted, the applied loading is assumed
to be normal to the face and a positive pressure is into the solid.
The loads are proportional to the area, not the projected area.