Reinforcement Data Editor

Reinforcement Data Editor

Click the “Steel Bars” tab to display the “Reinforcement Data Editor” showing the steel bars selected after beam bending and shear design.


This form is a dynamic dialog. It allows the user to edit the selected steel bars and links. The user can also examine the effect of changes on the calculations immediately. The provided reinforcement patterns are very detailed so that little or no editing of the detail drawings is required. The detail drawings of the beams in the current axis can be viewed using the "Detail Drawing" button in this dialog.

This Editor consists of four sections:
  1. The schematic sketch of the beam :

     On the top of the form, the beams on the current axis are drawn schematically. The sketch shows the supports, beam labels, section dimensions, span lengths and required steel areas (at the top edge and bottom edge, at supports and span).
  2. Excess Steel Areas 

    Just below the beam sketch, the “Extra As” values are displayed, indicating the excess steel area provided by the supplied steel at the same locations. If any modification is made to the selected steel bars, the affected “Extra As” values will be automatically updated.
    1. The red values in these fields indicate that the steel area requirement at that position is not adequate.
  3. Reinforcement Data Fields :

    These are located beneath the "Extra As" values. The steel bar fields are arranged according to the reinforcement pattern selected. Navigation between the steel bar fields can be made by simply clicking the mouse button or by arrow keys. The automatically selected bars can be modified using the spin buttons located adjacent to the selected steel bar field.
    1. If any modification is made, recalculation of the supplied bars will be dynamically performed and other related fields will be updated as well. More information on the reinforcement data fields can be found in the related topics below.
  4. Feedback Fields Section : 

    This section is located at the lower part of the form. More information on these fields can be found in the following sub-sections.

As-min Fields

Minimum steel areas calculated based on the minimum steel percentages stated in the active concrete code will be displayed in these data fields separately for top edge and bottom edge of the beam and for supports and span region.
The values in these fields will be displayed in red when the supplied reinforcement does not satisfy the minimum requirements.

B-Up Middle Fields (Only With Bent-Up Pattern)


These fields display the possible width of the middle straight section of the bent-up bars. If the reinforcement pattern used does not include the bent-up bars, these values will not be shown.

s-Bar-CL Fields

The minimum section width that is required for placing the selected bars (at the top and bottom edge of the beam) will be displayed in these fields. The clear distance between the bars is calculated using the standard aggregate size. The values displayed in these fields include link size, concrete covers, longitudinal bar sizes and the clear distance between the bars.  The values in these fields will be displayed in red when the provided bars do not fit in the current beam section.

Defl. Check Results

ProtaStructure carries out deflection checks based on the clauses of the active concrete codes. The output of the deflection checks is displayed in these fields.
Links in the support regions are calculated automatically and the calculated widths of the support regions are displayed in these fields.

Reinforcement Data Editor - Steel Bar Groups

Based on the selected reinforcement pattern, several “Steel Bar Types” are used during design and curtailment. Using these fields, you can modify the selected steel bars that are initially set by the program.

The cursor is positioned on the first field of the first bay when this menu is loaded. Navigation between the steel bar fields can be made using the mouse, direction keys and Enter key. You can also use the “Previous/Next Span” buttons or Left and Right key with Ctrl key pressed to navigate between beams in the axis.

To modify a selected bar group, you can use the up/down buttons located on either side of the steel bar field. For longitudinal bars, the Up/Down button to the left side of the field controls the steel bar quantity while the Up/Down button to the right side of the field controls the steel bar diameter. Alternatively, you can use the following short-cut keys to modify the steel bars:



F1    
Increase steel bar quantity
F2   
Decrease steel bar quantity
F3
Select an available bigger bar diameter
F4
Select an available smaller bar diameter


For example, to modify 2T16 to 4T14, it will be sufficient to press F1 twice and F4 once.

The available Steel Bar Groups in ProtaStructure are outlined below. All of the following bar groups will not be visible in all reinforcement patterns. The necessary bar groups will be available depending on the selected reinforcement pattern. Reinforcement patterns can be selected using the “Select Bars” button in the ribbon.

Hanger Bars

Hanger bars are used mainly with the bent-up bar patterns to provide links to be connected. These bars are used at the top layer in beams and in bottom layer in the foundation beams.
The general mask used in this field is “<n>Ø<d>” form.


Hanger Bars Field

The number of hanger bars is usually determined based on the width of the section.
The hanger bars are usually lapped at mid-span when the selected quantity and size is the same as the neighbouring spans.
Unlike the top and bottom straight bars, hanger bars are not extended to 0.25L of the adjacent span.
The “Min. No. of Hanger Bars” and “Min. Hanger Bar diameter” in the “Settings and Parameters” dialog controls the minimum number of bars that can be placed in each span and the size of the bars.

The “Steel Bar Cut Length” field in the “Settings and Parameters” dialog controls when the bars will be lapped. The bars are extended along the spans until the “Steel Bar Cut Length” value is reached.
These bars are used in both the span and support regions of the beam to satisfy the required steel area.

Top Bars

Top straight bars are placed at top layers of beams. They are used in both span and support regions of the beam to satisfy the required steel area.
Also, when extended to 0.25L to the adjacent beams, they are also used to satisfy the required steel area of the supports of the adjacent span beams.
These bars can be used as hanger bars when it is desired that separate bars be put in every span.
The general mask used in this field is “<n>Ø<d>” form.


Top Bars Field

The top bars will not be extended to the adjacent support when the top levels of the beams are not the same; therefore they will not be used to satisfy the required steel area of the supports of the adjacent span beam.

In the first and last supports or when there is a level difference between the beams, these bars are extended to the column and a bob (bent of bars) is made when necessary to provide sufficient anchorage.

Support Top Bars

Support top bars are placed at top layers at supports of beams. They are used in support regions of both beams and are extended to satisfy the required steel areas. They are either extended to 0.25L to into the adjacent beams and lap the span bars.

The general mask used in this field is “<n>Ø<d>” form.

In the first and last supports or when there is a level difference between the beams, these bars are extended to the column and a bob is made when necessary to provide sufficient anchorage.

Support Top Bars Field

Two different groups of support top bars will be provided when the top levels of the beams are not the same.

Bent-up Bars

Bent-up bars will be available when a reinforcement pattern that uses this bar group is selected. Bent-up bars are used in top layers of support regions and bottom layer span regions. They are extended to 0.25L to the adjacent beams. Therefore they are used to satisfy the required steel area of the supports of the adjacent span beams.

Bent-up bar curtailment style is controlled by the parameters provided in the “Bent-up Bar Controls” section of the “Settings and Parameters” menu.

The general mask used in this field is “<n>Ø<d>” form.


Bent-up Bars Field

Bottom Bars

Bottom straight bars are placed at the bottom layers of the beams. They are used in both the span and support regions of the beam to satisfy the required steel area.

Also, when extended to 0.25L to the adjacent beams, they are also used to satisfy the required steel area of the supports of the adjacent beams.
The general mask used in this field is “<n>Ø<d>” form.


Bottom Bars Field

The bottom bars will not be extended to the adjacent support when the bottom levels of the beams are not the same; therefore they will not be used to satisfy the required steel area of the supports of that adjacent beam.

In the first and last supports or when there is a level difference between the beams, these bars are extended to the column and a bob is made when necessary to provide sufficient anchorage.

Support Bottom Bars

Support bottom bars are placed at the bottom layers at the supports of beams. They are used in support regions of both beams and are extended to satisfy the required steel areas. They are either extended to 0.25L to into the adjacent beams and lap the span bars.

The general mask used in this field is <n>Ø<d>” form.
In the first and last supports or when there is a level difference between the beams, these bars are extended to the column and a bob is made when necessary to provide sufficient anchorage.

Support Bottom Bars Field

Two different groups of support top bars will be provided when the bottom levels of the beams are not the same.
For deeper beams bars are used in side faces of beams for control cracking. The number and spacing of these bars is determined based on the requirements of the selected codes of practice.

The minimum bar size is determined based on the value specified in “Web Steel Diameter” field in the “Settings and Parameters” dialog.

The “Min. No. of Hanger Bars” and “Min. Hanger Bar diameter” controls the minimum number of hanger bars that can be placed in each span and the size of the bars.
The general mask used in this field is “<n>Ø<d>” form. The parameter “n” is applied for each beam side.


Side Bars Field
Equally spaced links can be placed along the beams in three regions, namely, left and right supports and span.

The width of the support regions is determined and displayed in the “x-Sup.Links” line in the “Reinforcement Information” editor.
The general mask used in this field is “<n>Ø<d>/<s>” form.


Links Field

Link arrangement and calculation parameters are available in the “Links” page of the “Settings and Parameters” menu. Using these options, minimum and maximum link spacing, link diameter range and support links arrangement can be controlled.

Bent-up bars (if available) are not considered in shear design.

Whenever the torsion force has exceeded the concrete torsional capacity of the beam (without rebar), torsion links (closed links) are automatically designed. The prefix 'T' will be shown beside the link type in ProtaDetails as shown in the diagram below: 


Reinforcement Data Editor - Buttons

The following buttons are displayed in the ribbon at the top of the Reinforcement Data Editor.

Select Bars

Various reinforcement and curtailment patterns are available and can be selected using the “Select Bars” button located in the ribbon. You can select the most suitable reinforcement pattern using this button, available  reinforcement patterns are as shown below:
  1. Bent-Up Pattern
  2. Standard Pattern No. 1
  3. Standard Pattern No. 2
  4. Standard Pattern No. 3
By default,  ProtaStructure designs beams according to Standard Pattern No. 2. This default reinforcement pattern can be changed in setting center:

For more explanation on Reinforcement Pattern, please refer to  Beam Design Settings > Reinforcement Pattern.

Diagrams


The shear force, bending moment envelope diagrams for the beams in the axis can be generated by clicking the “Diagrams” button in the ribbon.

Envelope diagrams are generated using all the loading combinations.

Furthermore, you can select any load case or combination. For the selected load case or load combination, the shear force, bending moment diagrams will be displayed accordingly.

While using “Print” button enables you to print the diagram, diagram values can be saved to a text file by using “Table” button in the Diagrams Form.


 To navigate between the beams you can use the left and right arrow buttons.

Scaled View and Horizontal Scaled Adjustments

 

The beams may appear based on their actual span lengths in this editor if the “Scaled” option in the ribbon is checked. The horizontal scale may be modified using the up and down buttons next to the “Scaled” checkbox.

Modification of the horizontal scale m
ay be necessary when the resolution of your display is not sufficient, or when you want to see more (or less) beams in one screen.

Closing the Editor

You can use the “OK” button to close the editor; save the modifications made to the current axis and return to the “Beam Section Design and Detailing” form. Changes will be discarded if the “Cancel” button is used to close the editor.







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