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STAAD Commands and Input Instructions
Section 5
5-118
5.23.3 Member Tension/Compression Specification
Purpose
This command may be used to designate certain members as
Tension-only or Compression-only members.
General Format:
MEMBER TENSION
member - list
MEMBER COMPRESSION
member - list
MEMBER TENSION 0
(No list required)
Description
Tension-only members are truss/cable members that are capable of
carrying tensile forces only. Thus, they are automatically
inactivated for load cases that create compression in them.
LINEAR TENSION/COMPRESSION ANALYSIS
Compression-only members are truss members that are capable of
carrying compressive forces only. Thus, they are automatically
inactivated for load cases that create tension in them. Member
Releases are not allowed on members with this attribute.
See Section
1.9
The procedure for analysis of Tension-only or Compression-only
members requires iterations for every load case and therefore may
be quite involved. The user may also consider using the
INACTIVE specification (instead of Tension/Compression) if the
solution time becomes unacceptably high.
If a CHANGE command is used (because of a change in the list of
tension members, cable tension, supports, etc.), then the SET NL