Analysis Result of Fiber Section

Analysis results of fiber sections from time history analysis are displayed. The results consist of member force history of inelastic beam members modeled with fiber elements, stress – strain results of each section cell, and the state of fibers.  

From the Main Menu select Results > Time History Results > Analysis Result of Fiber Section

Select Results > Time History Results > Analysis Result of Fiber Section in the Menu tab of the Tree Menu.

 

Element

Enter a beam element number modeled with fibers. Analysis results of the fiber model defined within the element are produced.  

Load case

Select a time history analysis case defined in Time History Load Cases.

Object for Plotting

Section: Plot the analysis results of the entire section of the selected element.

Fiber: Plot the analysis results of each cell of the selected element.

Position: Select the positions in the element local x-direction where the results are required. 5 Positions including i and j ends can be selected as shown in the following figure.

Type of Graph

Define the types of  X and Y axis of the results output.

If Section is selected

X-axis can be defined for Dx, Ry, Rz, Fx, My, Mz, and Time. Y-axis can be defined for Dx, Ry, Rz, Fx, My and Mz. For 6 most frequently used combinations of components, selection can be made by the use of the buttons provided.

Dx-Fx: Displacement – Axial force in the ECS x-axis direction

My-Fx: Moment about the ECS y-axis – Axial force in the ECS x-axis direction

Ry-My: Curvature about the ECS y-axis - Moment about the ECS y-axis

Mz-Fx: Moment about the ECS z-axis – Axial force in the ECS x-axis direction

Rz-Mz: Curvature about the ECS z-axis - Moment about the ECS z-axis

My-Mz: Moment about the ECS y-axis - Moment about the ECS z-axis
 

If Fiber is selected

Time: Time

SN: Strain

SS: Stress

 

Plot Table: Generate the time history analysis results in a table format.

: Display the graph based on the assigned axes.

: Select cells.

: Unselect all the selected cells.

: Display all the cells.

: Zoom the selected screen display

: Zoom in the screen

: Zoom out the screen

: Turn on/off the axis.

Display Cell Numbers

Note

Fiber Cells are assigned numbers according to the following rules:

Numbering order for materials:  from Concrete Cell to Steel Cell

Numbering order for directions:  1. from left to right, 2. from up to down

 

Note

z and y axes displayed in the Fiber Section Animation window represent the element local z and –y axes, respectively (looking at the member from the I-end of the member).  

Fiber State

Specify the state of the output display for the fiber model.

Tension: Display the analysis results of the tension side.

Compression: Display the analysis results of the compression side.

Elastic, Crack, Yielding, Crushing: Select colors for each fiber state

Blending: Define the intensity of the display colors.

 

Time Step: Select a time history step at which analysis results will be produced.

: Initialize the fiber model.

: Plot the analysis results of the fiber model.

 

: Graphical data for analysis results can be saved in the Windows Bitmap (BMP) file format.

Fiber State definition is different for reinforcing steel and concrete and for each material model.  Definition of Fiber State is as follows:

  •   Fiber State of Steel

    Tension Range: Elastic, Yielding
    Compression Range: Elastic, Yielding

  •   Fiber State of Concrete

    Tension Range: Elastic, Crack
    Compression Range: Elastic, Yielding,     Crushing

 

Menegotto-Pinto Model

Elastic within the rectangle zone and Yielding elsewhere

 

Bilinear Model

Elastic within the rectangle zone and Yielding elsewhere

 

Unsymmetric Bilinear Model

Elastic within the rectangle zone and Yielding elsewhere

 

Trilinear Model

Elastic within the rectangle zone and Yielding elsewhere

 

 

 

 

 

  

Kent & Park Model

Tension :

Crack

Compression :

Elastic

 

Yielding

 

Crushing

 

Japan Concrete Standard Specification Model

Tension:

Crack

Compression:

Elastic

 

Crushing

 

Japan Roadway Specification Model

Tension :

Elastic

 

Crack

Compression :

Elastic

 

Yielding

 

Crushing

 

Japan Highway Corporation Model

Tension :

Elastic

 

Crack

Compression :

Elastic

 

Yielding

 

Crushing

 

Trilinear Concrete Model

Tension :

Elastic

 

Crack

Compression :

Elastic

 

Yielding

 

Crushing

 

 

Animation

Select the time history step at which the analysis results need to be produced.

Step: Specify the step at which the time history analysis results need to be displayed. If a specific step is entered, it moves to the step directly.

Increment: Graphic output is produced and recorded at the specified increment.

Time: The actual time of the loading corresponding to the current step is produced.

: It auto-generates the animated results of time history analysis. The interval of display is at the specified Increment.

: Pause Animation generation.

: Stop Animation generation.

: Moves to the first step of the time history analysis result.

: Move backward to the previous steps by the increment.

: Move forward to the subsequent steps by the increment.

: Move to the last step of the time history analysis results.