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Section 5
5-117
This is a truss member but not a tension-only member unless
you also include this member in a MEMBER TENSION input. See
section 5.23.3. Note also that Member Releases are not allowed.
The tension is a preload and will not be the final tension in the
cable after the deformation due to this preload.
Description for use in Non Linear Cable Analysis :
The CABLE members, in addition to elastic axial deformation, are
also capable of accommodating large displacements.
General format:
MEMBER CABLE
member-list
TENSION f
1
---OR---
member-list
LENGTH f
2
See Sections
1.9, 1.11,
1.18.2.5,
5.37
where f
1
= Initial Tension in cable member
(in current units)
where f
2
= Unstressed cable length
(in current units)
Example
MEMB CABLE
20 TO 25 TENSION 15.5
Notes
The TENSION specified in the CABLE member is applied on the
structure as an external load as well as used to modify the stiffness
of the member. See Section 1.11 for details.
The tension is used to determine the unstressed length. That
length will be shorter than the distance between the joints by the
distance that the tension will stretch the cable.