Architecture & Structural Engineering

Single Footing Reinforcement

Single footing reinforcement design results and inadequacy conditions for individual foundations are displayed in the Single Footing Reinforcement dialog. In the Single Footing Reinforcements dialog, foundation reinforcements, soil stresses and slip-punch results are given.

The Place of Single Footing Reinfocement Dialog

After the analysis, you can access it by clicking the Single Foundation Reinforcements command under the ribbon menu Analysis and Design tab, Reinforced Concrete Design heading .

image-20210922-123405.png

General Specifications of Single Footing Reinforcements Dialog

Summary

Summary information about the line where the cursor is located is given in the Name of the dialog in Solid, Name format.

image-20210922-124103.png

Example Base, T001

Using the Shift key

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

Using the Ctrl key

The Ctrl key selects the in-between lines one by one.

Reinforcement calculator

image-20210922-124145.png

Calculates the amount of reinforcement in area for the selected diameter and spacing.

Previous

image-20201127-071208.png

The cursor moves to the previous line.

Next

image-20201127-071333.png

The cursor moves to the next line.

Recalculate

image-20210922-124201.png

Rebuilds the element reinforced concrete. Regulation calculations related to reinforced concrete and reinforcement are also made again. For significant changes, it may be more appropriate to repeat the structural analysis instead of reinforced concrete.

OK

image-20240315-110423.png

Saves the changes made and closes the dialog.

Cancel

image-20240315-110409.png

Closes the dialog without saving the changes made.

Insufficiency Code

Description

K

Shear safety is not satisfied.
The footing fails to meet the required shear capacity. Solutions: Increase footing dimensions; enhance shear reinforcement by increasing stirrup diameter or reducing spacing.

M

The maximum reinforcement ratio is exceeded.
The reinforcement ratio surpasses code limits. Solutions: Reduce the amount of reinforcement; adjust footing dimensions to comply with code limits.

Zg

Soil bearing capacity is exceeded.
Solutions: Increase the area of the footing; improve soil conditions; consider using piles or other ground improvement techniques.

As(-)

Provided reinforcement area is insufficient.
Solutions: Choose larger diameter bars; increase the number of bars to meet the required area.

Single Footings Tab

image-20240315-111031.png

Specifications

DS

image-20201230-143330.png

It is the reinforcement fixing column. If marked, the reinforcements are fixed. The DS is automatically marked when changes are made to the basic reinforcements and the reinforcements remain fixed even after analysis. If DS is not marked, the reinforcements are determined again according to the reinforcement selection conditions after the analysis.

ID

image-20210922-124314.png

It is the name of the single footing in the plan. (T001, T101, T010 etc.) In case of negativity, the negation term is added next to the name.  Example: T101(Z)

XL

image-20210922-073439.png

The dimensions of the single footing.

MSc

image-20210922-073454.png

The dimensions of the single footing.

Major Axis

image-20210922-124438.png

It is the number and diameter of reinforcement in the major axis direction.

Minor Axis

image-20210922-124446.png

It is the number and diameter of reinforcement in the minor axis direction.

H Col.

image-20240315-111155.png

It is the height of the section at the column edge.

H Edge

image-20240315-111209.png

It is the height of the section on the basic edge. (cm)

Max.B.Prs.

image-20240315-111229.png

It is the maximum base pressure value.

Moments-Reinforcement Areas Tab

image-20240315-111550.png

Specifications

Moment

image-20210922-125317.png

The design moments in the horizontal and vertical directions of the single footing are shown.

As (Calculated)

image-20210922-125437.png

They are the reinforcement areas calculated from the design moment in the horizontal and vertical directions of the single footing for a width of 1 meter.

As (Required)

image-20210922-125747.png

For 1 meter width, these are the reinforcement areas that should be placed in the horizontal and vertical direction of the single footing as per the specification.

As (Existing)

image-20210922-125753.png

For 1 meter width, they are the existing reinforcement areas in 1 meter in the horizontal and vertical direction of the single footing.

Concrete fck

image-20210922-125819.png

It is the characteristic compressive strength of concrete belonging to a single footing.

Concrete fcd

image-20210922-125827.png

 It is the characteristic calculation compressive strength of concrete belonging to a single footing.

Concrete fctd

image-20210922-125835.png

It is the characteristic calculation tensile strength of concrete belonging to a single footing.

Rebar fyk

image-20210922-125841.png

 The reinforcement is the characteristic yield strength.

Rebar fyd

image-20210922-125847.png

The reinforcement is the design yield strength.

Soil Stresses Tab

image-20240315-111610.png

All stress values are listed, from maximum stress to minimum stress, depending on the selection of the loading combination. In some cases, the soil stress may be greater in the middle of the column in a single footing. In this case, you may not see the maximum ground stress value given at the bottom here.

Specifications

Select load case or combination to view results

image-20210922-130237.png

The combination in which the soil stress values are shown is selected.

Minimum soil stress

image-20210922-130627.png

It is the minimum soil stress from all loads.

Maximum soil stress

image-20210922-130649.png

It is the maximum soil stress from all loads.

Slip - Punching Tab

image-20240315-111658.png

Specifications

Vpr

image-20210922-080107.png

Punching Strength. Vpr= gamma * fctd * Up * d (gamma=1 )

Vpd

image-20210922-080121.png

Punching Load.

Fa

image-20210922-080134.png

Sum of plate loads inside the punching perimeter

Tp

image-20210922-080145.png

Punching stress

Up

image-20210922-080439.png

Punching critical section.

N

image-20210922-080451.png

It is the vertical force of the column multiplied by the load coefficients. If there is no column on the upper floor, zero appears.

Stress

image-20210922-131001.png

It is the soil stress value.

Combination

image-20210922-131029.png

It is the combination of loading that creates the most unfavorable stapling situation.

Vdx

image-20210922-080554.png

The design in the horizontal direction is the shear force.

Vdy

image-20210922-080625.png

 It is the design shear force in the vertical direction.

Vcrx

image-20210922-080633.png

 It is the shear force that creates the oblique crack in the horizontal direction.

Vcry

image-20210922-080639.png

It is the shear force that creates the oblique crack in the vertical direction.