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Corbel

This screen contains input fields in the left part, corbel view in the right upper corner and results in the right bottom corner. The appearance of the workspace may be change in the window "Global settings" that is available in the part "Options" of the main menu. Following inputs should be specified for the detail:

Materials

The materials of member and reinforcement can be specified in this part. There is a dedicated window "Materials" for materials input. This window can be launched using "Material" button. Both pre-defined strength grades and user defined input of material characteristics are available in this window.

Dimensions

Part "Dimensions" is dedicated for the selection of the corbel shape and specifying its dimensions.

Button for changing the corbel type

The dimensions may be specified in the corresponding input fields or directly in the workspace with the help of active dimensions.

Editing dimensions in the workspace

Loading

The corbel is loaded mainly by the vertical force with certain eccentricity. This part contains following inputs:

Eccentricity aC

  • The distance between the force and the edge of column or beam

Vertical force FEd

  • The design value of the vertical force

Horizontal force HEd

  • The additional horizontal component. The value is usually calculated as a part of the vertical force, however an arbitrary value may be specified. This component increases the area of the main reinforcement.

HEd/FEd

  • The ratio of the vertical and horizontal component of the load. Minimum recommended value is 0.2

Slide plate

Following data may be specified for the sliding plate:

Length lp

  • The length of the slide plate. The internal edge is the important data for the placement of the shear reinforcement.

Height Δh

  • The height of the slide plate. This value increases the eccentricity of the loaded point and thus also the tensile force in the main reinforcement.

Width bp

  • The width of the slide plate.

Reinforcement

The main tensile reinforcement may be specified here. The reinforcement is defined by the number of bars and diameter.

If the setting "Minimum cover" is switched on, the software automatically calculates the minimum cover according to the stirrups diameter and the parameters specified in the window "Reinforcement cover" (the window may be opened using the button "Edit"). The user defined value may be specified if the setting is switched off.

The button with corbel scheme launches the window "Reinforcement" that contains extended options for reinforcement input (second layer, different diameters per layer).

Button for detailed input of reinforcement

Stirrups

The reinforcement by horizontal and vertical stirrups should be also specified for the corbel. Horizontal stirrups are necessary for the elimination of transverse tension in the compression struts, vertical stirrups also create the tension ties in the strut and tie model for long corbels.

The stirrups are defined by the diameter, number of stirrups (number of rows along the corbel length) and number of bars (number of bars in one row). The steel grade may be specified in the part "Materials" (described above).

Results

The right bottom part of the window shows the results of the analysis and also the error messages. The analysis is described in the theoretical part of the help.

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