Analysis Result of Fiber Section

Function

• 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.

Call

From the Main Menu select [Results] tab > [Type : Time History Analysis] > [Time History Analysis] group > [Result of Fiber Section]

Input

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.

If Fiber is selected

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 Fiber : 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

Fig. Menegotto-Pinto Model   Elastic within the rectangle zone and Yielding elsewhere   Fig. Bilinear Model   Elastic within the rectangle zone and Yielding elsewhere   Fig. Unsymmetric Bilinear Model   Elastic within the rectangle zone and Yielding elsewhere   Fig. Trilinear Model   Elastic within the rectangle zone and Yielding elsewhere

Fig. Kent & Park Model   Tension : Crack Compression : Elastic   Yielding   Crushing   Fig. Japan Concrete Standard Specification Model   Tension: Crack Compression: Elastic   Crushing   Fig. Japan Roadway Specification Model   Tension : Elastic   Crack Compression : Elastic   Yielding   Crushing   Fig. Japan Highway Corporation Model   Tension : Elastic   Crack Compression : Elastic   Yielding   Crushing   Fig. 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.