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STAAD Commands and Input Instructions
Section 5
5-114
5.23.1 Member Truss Specification
Purpose
This command may be used to model a specified set of members as
TRUSS members.
Description
This specification may be used to specify TRUSS type members in
a PLANE, SPACE or FLOOR structure. The TRUSS members are
capable of carrying only axial forces. Typically, bracing members
in a PLANE or SPACE frame will be of this nature.
General format:
MEMBER TRUSS
member-list
TENSION f
1
where f
1
= optional Initial Tension in truss
member (in current units)
For NON-LINEAR CABLE ANALYSIS Only: The Tension
parameter is ignored except in Non Linear Cable Analysis. For that
analysis type, a truss with pretension is considered to be nonlinear
(large displacement). In this analysis type, trusses without preload
are assumed to be linear members that carry both tension and
compression regardless of this command
This command is superfluous when a TRUSS type structure has
already been specified using the command STAAD TRUSS.
See Sections
1.9 and 1.10
Example
MEMB TRUSS
1 TO 8 10 12 14 15