|
||
|
|
||
Open service Concrete Advanced.
Start (double-click) function Pretensioning – beam strand pattern.
Select the 1D member where the beam strand pattern is to be inserted.
Select item Bore hole.
In case of arbitrary beam the Cross-section manager opens on the screen and you must select the required cross-section.
The Bore hole pattern manager opens on the screen.
Select the required bore hole pattern.
Position the bore hole pattern in the cross-section.
The editing dialogue for the beam strand pattern opens on the screen.
Define the required sections of the beam strand pattern. Also the selection (or input) of a pre-stressing load case may be required during this. The load case is required for storage of results.
Confirm with [OK].
Open service Concrete Advanced.
Start (double-click) function Pretensioning – beam strand pattern.
Select the 1D member where the beam strand pattern is to be inserted.
The Select template dialogue opens on the screen.
Select item Sectional strand pattern.
In case of arbitrary beam the Cross-section manager opens on the screen and you must select the required cross-section.
The Sectional strand pattern manager opens on the screen.
Select the required bore hole pattern.
Position the bore hole pattern in the cross-section.
The selection (or input) of a pre-stressing load case may be required during this. The load case is required for storage of results.
The editing dialogue for the beam strand pattern opens on the screen.
Confirm with [OK].
The dialogue for the definition or editing of a beam strand pattern consists of the following parts:
tabs for individual sections with graphical window,
tab for input of a new section,
info-table,
bore-hole information and button for its change,
legend,
strand properties,
view parameters button,
debonding length button,
template buttons,
control buttons.
The graphical window displays the selected cross-section and the defined pattern of holes. It supports standard features of SCIA Engineer graphical windows:
[Ctrl] + [Shift] + right-click and drag to zoom in and out the drawing,
[Shift] + right-click and drag to move the drawing.
This table is located in the top left corner of the dialogue.
|
Name |
Specifies the name of the pattern. |
|
Position |
(informative) Informs about the position of the section on the 1D member. |
This part of the dialogue shows the bore hole selected for the current strand pattern. The button [Change bore hole] can be used to change the pattern.
Note: If the bore hole pattern is changed, all already defined strands are deleted.
The legend has two roles:
(informative) it explains the symbols used in the graphical window (each type of strand uses a special graphical mark or colour),
(active) it is used for the input of individual strands into the bore holes.
The procedures for input and removal of strands and for adjustment of special properties are described in chapter Defining a new sectional strand pattern.
Whenever a defined strand is selected in the graphical window, its properties are shown in the Properties window. The meaning of the properties is described in chapter Defining a new sectional strand pattern.
Using the action button in the bottom part of the property dialogue you may calculate losses for the selected strand. The button opens a dialogue with a table and diagram of calculated short-term losses.
Note: See also chapter Short-term losses.
|
Yp; Zp |
coordinate of the centre of gravity of entire strand pattern |
|
Yp, deb; Zp, deb |
coordinate of the centre of gravity of all debonded strands |
|
Yp, drap; Zp, drap |
coordinate of the centre of gravity of all draped strands |
|
n |
total amount of strands in strand pattern |
|
Ap |
total area of entire strand pattern |
|
Ac |
total cross-sectional concrete area without the area of strands |
|
Ap, deb |
total area of all debonded strands |
|
Ap, drap |
total area of all draped strands |
|
Y; Z |
coordinate of the centre of gravity of the combined cross-section - concrete plus pre-stressing steel |
|
Iz; Iy |
moment of inertia for z/y-axis of combined cross-section. (z-axis being strong axis) |
|
Iz,c; Iy, c |
moment of inertia for z/y-axis of combined cross-section without the strands (z-axis being strong axis) |
|
Wy, top; Wy, bottom |
section modulus for z/y-axis of combined cross-section at top of section |
This button opens a dialogue with view parameters. Their meaning is more or less self-explanatory.
A set of various debonding lengths can be defined here. One debonding length can be then assigned to a strand in the property window.
|
[Create template] |
A new template is saved to the project. |
|
[Create from template] |
The strand pattern is loaded from an existing template. |