Filter
Top Products
STAAD Commands and Input Instructions
Section 5
5-278
5.32.5 Prestress Load Specification
Purpose
This command may be used to specify PRESTRESS loads on
members of the structure.
General Format:
⎧PRESTRESS ⎫
MEM
BER ⎨ ⎬ (LOAD)
⎩
POSTSTRESS
⎭
*
⎧ES f
2
⎫
member-list FOR
CE f
1
⎨EM f⎬
3
⎩
EE f
4
⎭
f
1
= Prestressing force. A positive value indicates
precompression in the direction of the local x-axis. A
negative value indicates pretension.
ES = specifies eccentricity of the prestress force at the start of
the member at a distance f
2
from the centroid.
EM = specifies eccentricity of the prestress force at the mid-
point of the member at a distance f
3
from the centroid.
EE = specifies eccentricity of the prestress force at the end of
the member at a distance f
4
from the centroid.
Description
The first option, (MEMBER PRESTRESS LOAD), considers the
effect of the prestressing force during its application. Thus,
transverse shear generated at the ends of the member(s) subject to
the prestressing force is transferred to the adjacent members.
See Section
1.16.5
The second option, (MEMBER POSTSTRESS LOAD), considers
the effect of the existing prestress load after the prestressing
operation. Thus, transverse shear at the ends of the member(s)
subject to the prestressing force is not transferred to the adjacent
members.