Slab Serviceability Checking

 

 

 

Produce the serviceability check results for slabs.

 

 

 

From the Main Menu select Design > Meshed Slab/Wall Design > Slab Serviceability Checking.

 

 

 

New for Gen 2010

 

   Load 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")

 

Serviceability Checking

 

Element: Display the serviceability check results using the internal forces calculated at each node of  the element.

 

Avg. Nodal: Display the serviceability check 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 serviceability check 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 serviceability check results using the average of the moments in the slab elements that contain the selected node.

 

 

Top: Produce the serviceability check results for the bars in the top of the slab for negative moments.

 

Bottom: Produce the serviceability check results for the bars in the bottom of the slab for positive moments.

 

Both: Produce the maximum of the serviceability check results for the Top and Bottom bars.

  

 

Dir. 1:  Display the serviceability checking results for the reinforcing steel entered in Dir. 1.

 

Dir. 2: Display the serviceability checking results for the reinforcing steel entered in Dir. 2.

 

 

 

Components

 

Stress Checking: Display the stress results in contour

 

Concrete: Display the compressive stress in the concrete

 

Reinforcement: Display the tensile stress in the reinforcement

 

Crack control: Display the crack results in contour

 

Crack Width: Display the value of crack width

 

Min As: Display the minimum area of rebar

 

Rebar Spacing: The minimum rebar spacing

 

Rebar Dia: The maximum rebar diameter

 

Deflection: Display the deflections

 

Uncracked: Calculate the deflection for the uncracked section and compare it with the allowable deflection.

 

Revision of Gen 2010 (v2.1)

 

Cracked: Calculate the deflection for the cracked section based on the cracked section analysis results and compare it with the allowable deflection.

 

Note 1 Cracking deflection can be evaluated after executing Perform Cracked Section Analysis.

 

Note 2 How to calculate the effective moment of inertia

Members which are expected to crack, but may not be fully cracked, will behave in a manner intermediate between the uncracked and fully cracked conditions and, for members subjected mainly to flexure, an adequate prediction of behavior is given by the following expression based on the sub clause 7.4.3 (3) in EN 1992-1-1:2004. Following factors including the effective moment of inertia by elements for each iteration step can be checked in "File Name_CSA.OUT" file.

  

   

 

Therefore Ieff (effective moment of inertia) can be calculated from the following equation.

 

   

Where,  

 

    

  

 

Creep: Long-term deflection due to creep effect  

 

 

Value: Display the values of the check results

 

Ratio: Display the ratio of the member force to the resistance

 

Operation

  

: Produce the serviceability check results of slab elements in a text format.   

 

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.