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Column Reinforcements

Column reinforcement design results and inadequacy conditions for columns are displayed in the Column Reinforcements dialog. In the column reinforcement dialog, the results of column transverse and longitudinal reinforcements, internal forces calculated as a result of the analysis, increased internal forces related to TBDY, capacity ratios, shear safety of column-beam connection, strong column control are given. Column reinforcements are changed and fixed in the Column Reinforcements dialog.

Location of Column Reinforcements Dialogue

After analysis, you can access it by clicking the Column Reinforcements command under the Concrete Design title of the ribbon menu Analysis and Design tab .

General Specifications of Column Reinforcements Dialogue

Summary Information

The summary information about the line where the cursor is located is given in the name of the dialog in the form of Layer, Pose.

For example, Story 4, S01, minimum alfai=1.000

Using the Shift key

In this tab, you can select more than one row with the Shift key, enter a value by double-clicking any cell whose value is open to change, and make that value apply to all selected rows.

Using the Ctrl key

Ctrl key, on the other hand, selects the lines in between one by one.

Reinforcement calculator

Calculates the amount of rebar, in area, for the selected diameter and span.

Show jackets

It displays the jackets in the column for strengthening projects.

Select

Selects the object on the line with the cursor. When the concrete dialog is closed, you can take action for the selected element.

All Stories

It lists the slabs on the screen throughout the entire story.

Previous

The cursor moves to the previous line.

Next

The cursor goes to the next line.

Filter

 

It is used to define certain conditions and filter only the elements that satisfy that condition.

Recalculate

The element rebuilds its concrete. The regulation calculations related to concrete and rebars are also made again. It may be more appropriate to repeat the structure analysis instead of concrete in important changes.

Ok

It saves the changes made and closes the dialog.

Cancel

Closes the dialog without saving the changes made.

Columns Tab

Specifications

DS

It is the rebar fixing column. If marked, the rebar is fixed. When the column rebar is changed, DS is automatically marked and when concrete is made, the column rebar remains constant. If DS is not marked, when concrete is made, column rebar is determined again according to rebar selection conditions.

ID

It is the name of the column in the plan. (S1, S101, S10 etc.) In case of negativity, the term related to negativity is added next to the name. Like S101 (M).

Story

It is the name of the story where the column is located.

B, H

They are the dimensions of the column. You can change the dimensions by double clicking in the B and H cells. When the size is changed, column rebar calculation is made for that column according to the changed dimensions.

Major

It is the value in diameter and number of rebar placed in the major direction of the column (in the y-axis direction).

Minor

It is the value in diameter and number of rebar placed in the minor direction of the column (in the x-axis direction).

Lateral

Column stirrup is respectively stirrup diameter, middle, densification and junction area range.

Perc.

It is the percentage ratio of the total amount of longitudinal rebar to the column area. (Perc. = 100 * TotalAs / ColumnArea)

S.R. Perc.

It is the percentage ratio of the amount of rebar calculated from the design effects to the area of ​​the column. (S.R. Perc. = 100 * AccountAs / ColumnArea)

WC

If it is marked, it means that the condition of column 7.3.5 specified in the earthquake regulation does not meet the condition of columns being stronger than beams.

P

With this option, you can use the column shear force as the pitch shear force by accepting any column as if it is a shearwall while finding the alpha ratio. You may want to use this option especially for large polygon columns whose arms are like shearwalls.

Fiber Layout Tab

Specifications

Preview and legend

The fiber layout preview and what the colors mean are shown.

Material model for design

Section cells and rebars are displayed according to the concrete and rebar material model criteria defined in TS500.

Material model for performance assessment

The section cells and rebars are displayed according to the ŞGDT criteria for the concrete and rebar material model defined in TBDY.

Forces-Reinforcement Area Tab

Specifications

Table of forces

Load:  The name of the respective load or load combinations.
i: The left end of the element in the horizontal element is the lower end of the element in the vertical element.
j: The right end of the element in the horizontal element is the upper end of the element in the vertical element.
N: The axial force of the element
V2, V3:  The shear forces of the element in the 2 and 3 directions.
T: The torsion moment of the element.
M2: It is the bending moment of the element in the 2 (minor) direction.
M3: It is the bending moment of the element in the 3 (major) direction.

Design results

After the analysis, the regulation conditions have been applied, therefore it shows the end forces that have undergone changes and going to the design. In addition, the values ​​used are shown in bold. End forces are values ​​calculated on the element local axes.

Raw results

After analysis, it shows the raw end forces that are not applied to the regulation conditions. End forces are effects on the element local axes.

Global results

After the analysis, these are the values ​​in global coordinates of the extreme forces that are not applied regulation conditions.

Show individual results

For 4 modal analysis cases, 4 different results are obtained from each earthquake loaded combination. If you want the program to display the values ​​obtained for each modal state one by one, you should check this option.

Show maximums

The biggest values ​​of 4 different results obtained from each load combination for 4 different modal cases are shown in the table.

Design: It is the name of the combination used in the column longitudinal rebar calculation.
M3 (major): It is the moment value in the 3 axis of the combination used in the column longitudinal rebar calculation.
M2 (minor): It is the moment value in the 2 axis of the combination used in the column longitudinal rebar calculation.
F1 (axial): It is the normal force value of the combination used in the column longitudinal rebar calculation.

F1 (axial): It is the normal force value of the combination used in the column longitudinal rebar calculation.
Major: It is the value of the rebar placed in the major direction of the column in terms of number and diameter.
Minor: It is the value of the rebar placed in the column minor direction in terms of number and diameter.
Stirrup: It is the stirrup diameter, middle, density and junction area of ​​the column stirrup, respectively.
B, H: It is the dimensions of the column.
B major and B minor: These  are the increase values ​​calculated from the column buckling calculation on the basis of stories.

(Mra + Mrü) Major: For strong column control, it is the sum of the load-bearing moments in the column major direction (in the 3 axis), above and below the column.
1.2 (Mri + Mrj) Major: It is the sum of the moment of bearing strength on the left and right of the beams connected in the column major direction (3 axis) for strong column control.
(Mra + Mrü) Minor: For strong column control, it is the sum of the moment of bearing strength in the column minor direction (in the 3 axis), above and below the column. 1.2 (Mri + Mrj) Minor: It is the sum of the beams connected in the column minor direction (3 axis) for strong column control, on the left and right.
Strong column: It is the information whether power column control is provided or not.

Material characteristics

Concrete fck: The characteristic of concrete is its compressive strength.
Concrete fcd: The characteristic calculation of concrete is its compressive strength.
Beton fctd: Characteristic calculation of concrete is its tensile strength.
Rebar fyk: It is the yield strength of reinforcement steel.
Rebar fyd: It is the calculation strength of reinforcement steel.

Shear strength

Major: Indicates the major axis direction.
Minor: Indicates the minor axis direction.
Mha (i + 1): It is the moment value found at the lower end of an upper column according to TBDY Sections 3 and 4.
Mhü: It is the moment value found at the upper end of the column according to TBDY Sections 3 and 4.
Mha: It is the moment value found at the lower end of the column according to TBDY Sections 3 and 4.
Mhü (i-1): It is the moment value found at the upper end of a lower column according to TBDY Sections 3 and 4.
Mp top: Stiffened bearing strength moment value calculated at the upper end of the column's free height.
Mp bottom: Stiffened bearing strength moment value calculated at the lower end of the column's free height.
Did: It is the moment value at the upper end of the column's free height, which is taken as a basis in the calculation of the column shear force.
Ma: It is the moment value at the lower end of the column's free height, which is taken as a basis in the calculation of the column shear force.
And: It is the shear force value taken as basis for column transverse reinforcement calculation.
And if ≤ Vr or Ve ≤ 0.85 Aw fcd it means the column does not provide shear security. The program warns.

Capacity Design Tab

Specifications

Capacity chart

Combination: The corresponding combination is shown.
i: The left end of the element in the horizontal element is the lower end of the element in the vertical element.
j: The right end of the element in the horizontal element is the upper end of the element in the vertical element.
N: The axial force of the element
V2, V3:  The shear forces of the element in the 2 and 3 directions.
T: The torsion moment of the element.
M2: It is the bending moment of the element in the 2 (minor) direction.
M3: It is the bending moment of the element in the 3 (major) direction.
Capacity ratio: It shows the ratio of the effect of the element at the i and j ends of the respective loading / combination to its capacity at that loading. If the value is greater than 1, the element exceeds the maximum capacity.

Existing area of steel

The existing area of steel values ​​for end i, span and j end are shown.

Capacity Diagrams Tab

Specifications

Bending about 2 axis

Bending about 3 axis

Material model for design

Section cells and rebars are displayed according to the concrete and rebar material model criteria defined in TS500.

Material model for performance assessment

The section cells and rebars are displayed according to the ŞGDT criteria for the concrete and rebar material model defined in TBDY.

Design case

The combination for the capacity diagrams to be examined can be selected from the list.

Moment - Curvature Tab

Specifications

Schematic drawing

Moment - curvature diagram

Idealize

If marked, the moment-curvature plot is idealized. It is a moment curvature relationship obtained by drawing a horizontal line that intersects with an inclined line passing over the moment of yield and will equalize the areas between the moment curvature graph.

Stop when a fiber reaches ıltimate stress

If checked, the graphic ends when the graphic fiber reaches its highest stress.

Material model for design

Section cells and rebars are displayed according to the concrete and rebar material model criteria defined in TS500.

Material model for performance assessment

The section cells and rebars are displayed according to the ŞGDT criteria for the concrete and rebar material model defined in TBDY.

Point count

It is used to determine how many points the moment curvature graph consists of.

Angle

It shows the neutral axis angle from which the moment curvature relationship is obtained. It is indicated with a red arrow in the image above.

Axial force

It shows under which axial force the moment curvature relationship is drawn.

Compression limit

The determined material model is the largest axial pressure force that the section can take in the moment-normal force interaction.

Tension limit

The determined material model is the largest axial tensile force that the section can take in the moment-normal force interaction.

View stress/strain contours

It shows the stress and strain state in section in color format at each step of the moment curvature relationship.

Generate report

Creates a detailed report of moment-curvature.

Equation 7.3 Control Tab

Specifications

Control table

Major (+): It is the moment of bearing strength of columns and beams in the major direction calculated according to the earthquake + direction.
Major (-): It is the moment of bearing strength of columns and beams in the major direction calculated according to the earthquake-direction.
Minor (+): It is the moment of bearing strength of columns and beams in the minor direction calculated according to the earthquake + direction.
Minor (-): It is the moment of bearing strength of columns and beams in the minor direction calculated according to the earthquake-direction.
Mra, Mrü: They are the lower and upper bearing strength moments of the column, respectively.
Mri, Mrj: They are the left and right bearing strength moments of the beams, respectively.

(Mra + Mrü) Major: For strong column control, it is the sum of the load-bearing moments in the column major direction (in the 3 axis), above and below the column.
1.2 (Mri + Mrj) Major: It is the sum of the moment of bearing strength on the left and right of the beams connected in the column major direction (3 axis) for strong column control.
(Mra + Mrü) Major> 1.2 (Mri + Mrj) Major control is checked.

(Mra + Mrü) Minor: For strong column control, it is the sum of the moment of bearing strength in the column minor direction (in the 3 axis), above and below the column.
1.2 (Mri + Mrj) Minor: It is the sum of the beams connected in the column minor direction (3 axis) for strong column control, on the left and right.
(Mra + Mrü) Minor> 1.2 (Mri + Mrj) Minor control is checked.

In case of Nd≤ 0.10 Ac fck in both of the columns joining the node point, or at the nodal points of the top floor of single-storey buildings and multi-storey buildings, or if the curtain where the beams are stuck working like a column in a weak direction, the above condition is not compulsory.

The bottom line is; Displays whether Nd is greater than 0.1AcFck.

Nd: It is the axial force value that makes these moments the smallest in accordance with the direction of the earthquake in the calculation of column carrying power moments.
Ac: It is the gross cross-sectional area value of the column.
fck: It is the characteristic compressive strength value of concrete.

In case of Nd ≥ 0.10 Ac fck in one of the columns joining the node point and there are columns that do not satisfy the condition (Mra + Mrü) ≥ 1.2 (Mri + Mrj) in the system, in the earthquake direction considered, at any
i'th floor of the building, Alfai = Vis / Vik> If the condition = 0.70 is met, it is allowed not to provide (Mra + Mrü) ≥ 1.2 (Mri + Mrj) in some columns above and / or below the relevant floor.
Even if the columns that meet the condition of Nd ≤ 0.10 Ac fck (Mra + Mrü) ≥ 1.2 (Mri + Mrj), they can be used in the calculation of Vis.
Vik: It is the sum of the shear forces calculated in the direction of the earthquake in all columns on the first floor of the building.
Vis:It is the sum of shear forces calculated in the direction of the earthquake in the columns where (Mra + Mrü) ≥ 1.2 (Mri + Mrj) is provided at both the lower and upper joints of the building in the i'th floor.
If alphai = Vis / Vik> = 0.70, the bending moments and shear forces acting on the columns provided by (Mra + Mrü) ≥ 1.2 (Mri + Mrj) at both the lower and upper joints in the range 0.70 <alphai <1 1 / alphai It is increased by multiplying by the ratio.
If any floor does not fulfill the Alphai = Vis / Vik> = 0.70 condition, the program will give a warning.
Columns that do not satisfy (Mra + Mrü) ≥ 1.2 (Mri + Mrj) are marked in the ZK column in the Columns tab.
Alphai (E1), Alphai (E2), Alphai (E3), Alphai (E4): Alphai values ​​for 4 earthquake loads, respectively.

Buckling Tab

Column buckling calculations are made according to the moment augmentation method announced in February 2000 TS500. This tab provides detailed information about the account.

Specifications

Lateral displacement data

Stability: 1.5 di [total (Ndi / li) / vfi] <= 0.05
di: is the relative storey displacement value of the i'th storey.
Tot. (Ndi / li): It is the sum of the values ​​obtained by dividing the design axial force of each column by the length of the column measured from axis to axis.
Vfi: total shear force value at i times.

If the above condition is fulfilled, it is assumed that there is sufficient stiffness at that story and lateral displacement is avoided. Otherwise, it is assumed that the lateral translation has not been prevented.

Buckling analysis results

Total Nd: It is the total axial load acting on all columns in the floor. The load combination that makes the column under study the most unfavorable is taken carefully.
Total Nk X: It is the sum of the buckling loads of all columns on the story for the X direction.
Total Nk Y: The sum of the buckling loads of all columns on the story for the Y direction.
Story Beta X: It is the increase coefficient value for the story in X direction.
Story Beta Y: It is the increase coefficient value for the story in the Y direction.

Join Shear Safety Tab

Specifications

Column

It is the name of the column under study that appears in the plan.

Direction

The earthquake loads applied with 5% eccentric in each direction are displayed as a line to indicate two different directions as horizontal x and vertical y. EX1, EX2; If EY1, EY2 are loaded with + and - 5% eccentric in the x-axis direction; Indicates earthquake loads with + and - 5% eccentric in the Y-axis direction. Column-beam shear safety calculations are made in 2 directions for 4 earthquake loading and details are listed.

Beams

A list of the beams attached to the column in the respective direction is given. For example, the beams seen on EX1, EX2 lines are the beams connected to the column in the x direction. Respectively, the 1st beam is on the left of the column and the 2nd beam is on the right of the column. Similarly, the beams that appear in the EY1 or EY2 lines are the beams connected to the column in the y direction, respectively, the beam in the 1st line is the beam connected from the bottom of the column, and the beam in the 2nd line is connected from the top of the column.

As1, As2

They are the values ​​in cm2 of the reinforcements at the left or the ends of the beam, according to the direction of view, below or above the section.

Vkol

It is the smaller of the column shear forces calculated above and below the joint being controlled, separately for each direction and loading.

Ve

Including fyk steel yield strength; It is calculated from the formula V e = 1.25f yk (As 1 + As 2 ) - V arm .

Confinement

Joining of beams to column from four sides is defined as junction, confined junction if the width of each beam is not less than 3/4 of column width, and in other cases junction as unconfined joint. Whether the junction is enclosed or not does not indicate the insecurity of the junction, it determines by which formula the maximum shear force value Vmax will be found.

bj

In the direction of control, it is twice the smaller of the distance from the vertical middle axis of the beam stuck in the joint area to the column edges. (See: TBDY Figure 7.10)

h

It is the size of the column parallel to the direction of control.

Vmax

fcd, including concrete characteristic calculation strength;
In confined joints -> V max = 1.7 b j h √f ck In  unconfined
joints -> V max = 1.0 b j h √f ck
Ve <V max : Ve <= V max , column beam junction shear safety is provided. If not, it is not provided. If the join is unsafe, a "cross (x)" will appear, if it is secure, a "check mark" will appear on the corresponding line.

Accessories Tab

Specifications

3D image

Show columns

If the option is selected, column rebars are shown on the screen.

Show beams

If the option is selected, beam rebars are shown on the screen.

Show shearwalls

If the option is selected, shearwall rebar is shown on the screen.

Show longitudinal bars

Longitudinal bars of the elements with option marked are shown on the screen.

Show lateral bars

The transverse reinforcements of the elements with options are displayed on the screen.

Show individual colors

If the option is selected, bars with different diameters are shown in different colors. Which color represents which diameter is on the right of the screen. If the option is off, all of the rebars are shown in red.


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