Slab Flexural Design

 

 

 

Check the flexural design results for slab elements in contour. Also check the resulting bending moments and the design results of reinforcement along the specified Cutting Lines.

 

 

 

From the Main Menu select Design > Meshed Slab/Wall Design > Slab Flexural Design

 

 

 

New for Gen 2010

 

 

 

 

 

 

 

 

 

  Load Cases/ Combinations

 

Select a desired load case or load combination. Click  to the right to enter new or modify existing load combinations. (Refer to "Static Load Cases / Combinations")

 

  Flexural Design

 

Select to check the flexural design results for a slab.

 

 

Element: Display the automatic design results using the internal forces calculated at each node of  the element.

 

Avg. Nodal: Display the automatic design results using the average internal nodal forces of the contiguous elements sharing common nodes.

 

 

Element: Depending on the selected option above (Element or Avg.Nodal), produce the automatic design results for moments at each node of the elements that define the slab.     

 

Width: Depending on the selected option above (Element or Avg.Nodal), produce the automatic design results using the average of the moments in the slab elements that contain the selected node.

 

 

Top: Design top bars for negative moments.

 

Bottom: Design bottom bars for positive moments.

 

Both: Produce the larger of the Top and Bottom bars.

 

 

Dir. 1: Display the slab design results for the reinforcing steel entered in Dir. 1.

 

Dir. 2: Display the slab design results for the reinforcing steel entered in Dir. 2.

 

 

One-Way Flexural Design

 

Display the bending moments of the floor slab elements along a cutting line, and produce the design results of reinforcement.[Details...]

 

Defined Shear Check Lines : List of defined cutting lines

 

: Add the information contained in the Cutting Line Detail to the list of Defined Cutting Lines

 

: Delete a defined cutting line

 

: Modify a defined cutting line

 

Cutting Line Detail: Define a Cutting Line.

 

Name: Name of a Cutting Line

 

Pnt1: Start point of a Cutting Line

 

Pnt2: End point of the Cutting Line

 

Options

 

Define the plane and color for representing the graph.

 

Normal: Display the graph in the Normal direction of floor slab elements.

 

In Plane: Display the graph in the In-Plane direction of floor slab elements.

 

Scale Factor: Scale factor for diagram output

 

Reverse: Express the Diagram in the reverse direction.

 

Graph

Produce the output in a Graph Window ( valid only if 'Cutting lines' is selected).

 

Access the Plate Cutting Diagram Mode Dialog Box to determine the type of Graph Window.

 

Draw graphs on separate panes: Graphs pertaining to different Cutting Lines/Planes produced separately

 

Draw graphs on All in one pane: All the graphs pertaining to different Cutting Lines/Planes simultaneously produced in one graph

 

X-axis: Define the X-axis of the graph

 

Distance from Pnt1: Distance from the first point

 

Global X coord.

 

Global Y coord.

 

Global Z coord.

 

Value Output: Produce the moments in numerical values on the Cutting Line Diagram(s).

 

MinMax Only: Produce only the maximum and minimum values on the Cutting Line Diagram(s).

 

Element Edge

 

Specify the direction to produce the one-way shear check results of the slab elements with reference to the user-defined Cutting Line.

 

Both: Produce the Max/Min one-way shear check results of the slab elements on both sides of the user-defined Cutting Line.

 

Left: Produce the one-way shear check results of the slab elements on the left side of the user-defined Cutting Line.

 

Right: Produce the one-way shear check results of the slab elements on the right side of the user-defined Cutting Line.

 

Note

When the user-defined Cutting Line does not pass through the Mesh Line, Both, Left and Right will produce the same one-way shear check results.

 

 

Components

 

Rebar

 Display the spacing of rebars in contour, which are placed in a slab using the standard rebar sizes defined in the Design Criteria for Rebars.

 

As_req(mm^2/m)

 Display the area of the required reinforcement.

 

Rho_req

The ratio of the area of the required reinforcement to the gross area

 

Resistance Ratio

 The ratio of the design moment to the moment resistance when the designed rebar spacing is applied.

 

Wood Armer Moment

Display the Wood Armer Moments in contour.    

 

Note. Wood-Armer formula for skew reinforcement

 

From the analysis results, following plate forces about the local axis are calculated

- mxx

- myy

- mxy

In order to calculate design forces in the reinforcement direction, angle ¥á and ¥õ will be taken as following figure:

 

 

x, y: local axis of plate element

1, 2: reinforcement direction

¥á: angle between local x-direction and reinforcement direction 1

¥õ: angle between reinforcement direction 1 and reinforcement direction 2

 

Firstly, internal forces (mxx, myy and mxy) are transformed into the a-b coordinate system.

 

 

Then, Wood-Armer moments are calculated as follows:

 

 

 

 

 

 

Operations

 

: Produce the detail flexural design results of slab elements in a text format.

      

 : Produce the flexural design forces of slab elements in a tabular format.            

                          

 : Update the rebar quantity for each slab element. The updated rebar data is used for strength verification.

 

   

 

Type of Display

Type your drop-down text here.

 

Define the type of display as follows:

 

Contour

Display the slab flexural design results of the model in contour.

 

Ranges: Define the contour ranges.

 

: Assign the color distribution range of contour. Using the function, specific colors for specific ranges can be assigned.

 

Note
Contour Range Max/Min values can be larger than the max/min output values.  If the Contour Range values exceed the output values, they are entered at Rank 0 and Rank 11.

Number of Colors: Assign the number of colors to be included in the contour (select among 6, 12, 18, 24 colors)
 

Colors: Assign or control the colors of the displacement contour.

 

Color Table: Assign the type of Colors.

 

: Control the colors by zones in the contour.

 

Reverse Contour: Check on to reverse the sequence of color variation in the contour.

 

Contour Line: Assign the boundary line color of the contour

 

Element Edge: Assign the color of element edges while displaying the contour
 

Contour Options: Specify options for contour representation

 

Contour Fill

 

Gradient Fill: Display color gradient (shading) in the contour.

Draw Contour Lines: Display color boundaries in the contour.

 

Draw Contour Line Only
Display only the colored boundaries of the contour.

 

Mono line: Display the boundaries of the contour in a mono color.

 

Contour Annotation
Legend or annotation signifying the ranges of the contour is displayed.

 

Spacing: Display the spacing for the legnd or annotation.

 

Coarse Contour(faster) (for large plate or solid model)
Represent a simplified contour for a large model using plate or solid elements in order to reduce the time required to represent a complete contour.

 

Extrude
Where plate elements or solid elements along a cutting plane are represented in contour, a three dimensional contour is created. The positive direction of the analysis results is oriented in the z-axis direction of the local element coordinate system.
 

The option is not concurrently applicable with the Deformed Shape option. Similarly, the option cannot be concurrently applied to the cases where the Hidden option is used to display plate element thicknesses or the Both option is used to represent Top & Bottom member forces (stresses).

 

Values

Display the slab flexural design results in numerical values.
The font and color of the numbers can be controlled in Display Option.

 

Decimal Points: Assign decimal points for the displayed numbers

Exp.: Express as exponentials
 

Min & Max: Display the maximum and minimum values

Abs Max: Display the absolute maximum value

Max: Display only the maximum value

Min: Display only the minimum value

Limit Scale(%): Set the screen display limit for nodal displacements relative to the selected maximum or minimum value
 

Set Orientation: Display orientation of numerical values

 

Note
The default Decimal Points can be controlled in "Preferences".
Set Orientation = 0 horizontally displays the numerical values to the right of nodes or elements.
The orientation angle represents the counter-clockwise direction, which may be used to enhance the readability of the numbers.

Legend

Display various references related to analysis results to the right or left of the working window.

Legend Position: Position of the legend in the display window

 

Rank Value Type: Specify a type of values in the Legend and the number of decimal points.