Function
- Perform shear strength verification for the slab.
Note
In order to use this function, Eurocode2:05 or ACI318-11,08,05 must be selected in Design > Concrete Design Parameter > Design Code.
Call
From the Main Menu select [Design] tab > [Type : Meshed Design] > [Perform/Result] group > [Slab Design] > [Slab Flexural Checking]
Input
Load Combinations
Select a desired load case or load combination.
Click the ... Button to the right to enter new or modify existing load combinations. (Refer to "Static Load Cases / Combinations")
Flexural checking
Select to check the flexural check results for a slab.
Element : Display the strength verification results using the internal forces calculated at each node of the element.
Avg. Nodal : Display the strength verification 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 strength verification 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 strength verification results using the average of the moments in the slab elements that contain the selected node.
Top : Produce the strength verification results for the entered top bars due to negative moments..
Bottom : Produce the strength verification results for the entered bottom bars due to positive moments.
Both : Produce the maximum of the strength verification results for the Top and Bottom bars.
Dir. 1 : Display the slab checking results for the reinforcing steel entered in Dir. 1.
Dir. 2 : Display the slab checking results for the reinforcing steel entered in Dir. 2.
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(mm^2/m) : Display the area of the reinforcement defined by the user.
Rho : The ratio of the area of the reinforcement defined by the user 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
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 α and φ will be taken as following figure:
x, y: local axis of plate element
1, 2: reinforcement direction
α: angle between local x-direction and reinforcement direction 1
φ: 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
The Design Result Button : Produce the flexural checking results of wall elements in a text format.
The Design Force Button : Produce the flexural checking results of wall elements in a tabular format.
Type of Display
Contour
Display the displacement of the model in contour.
The ... Button
Ranges: Define the contour ranges.
The Customize Range... Button : 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.
The Customize Color Table Button : 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 nodal displacements in numerical values.
The font and color of the numbers can be controlled in Display Option.
The ... Button
Decimal Points : Assign decimal points for the displayed numbers
Exp. : Express as exponential
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.
The ... Button
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.