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STAAD Commands and Input Instructions
Section 5
5-110
5.22.2 Element Release Specification
Purpose
This set of commands may be used to release specified degrees of
freedoms at the corners of plate finite elements.
General Format:
ELEMENT RELEASE
*
⎧FX ⎫
⎧J1 ⎫ ⎪FY ⎪
element-list
⎨J2 ⎬ ⎨FZ ⎬
⎪J3 ⎪ ⎪MX ⎪
⎩J4 ⎭ ⎪MY ⎪
⎩MZ ⎭
where the keywords J1, J2, J3 and J4 signify joints in the order of
the specification of the element incidence. For example, if the
incidences of the element were defined as 35 42 76 63, J1
represents 35, J2 represents 42, J3 represents 76, and J4 represents
63. Element releases at multiple joints cannot be specified in a
single line. Those must be specified separately as shown below.
See
Section 1.8
FX through MZ represents forces/moments to be released per local
axis system.
Example
Correct Usage Incorrect Usage
ELEMENT RELEASE ELEMENT RELEASE
10 TO 50 J1 MX MY 10 TO 50 J1 J2 MX MY
10 TO 50 J2 MX MY 10 TO 50 J3 J4 MY
10 TO 50 J3 MY
10 TO 50 J4 MY