Time History Graph

 

 

 

Plot graphs for time history analysis results vs. time. The results include displacements, member forces /stresses of truss/beam elements, and member forces and deformations of general  link elements. If the evaluation of serviceability for floor vibration is carried out, comparative graphs are produced relative to the acceptance criteria.

 

 

 

From the Main Menu select Results > Time History > Time History Graph/Text > Time History Graph.

 

 

 

 

 Define/ Modify Function

 

Define or modify the type of time history analysis results to be plotted as graphs. The graphic output functions can be defined in Time History Result Function.

 

 

 Function List

 

The functions defined in Time History Result Function are listed.

 

 

 Merge Function List

 

Plot one or more output functions sequentially in one graph.

 

 

 Vertical Axis

 

Select the item corresponding to the vertical axis of the graph among the functions defined in the Function List.

 

 : Select the item corresponding to the vertical axis of the graph from the Function List.

 

 : Delete the item which has been selected from the Function List.

 

 

 Horizontal Axis

 

Select the item corresponding to the horizontal axis of the graph for the functions defined in the Function List. The item can be selected from either the Time or Function options.

 

Note

When Time is selected as Horizontal Axis,   and buttons become inactive. When Function is selected as Horizontal Axis, these buttons are activated and the functions in the Function List can be selected as the Horizontal Axis or the functions that have been already selected as the Horizontal Axis can be deleted.

 

 

Type of Display

 

Enter a title of the time history graph and a format of output for axes.

 

Graph Title: Title of time history graph

 

X Axis Deci. Pt. (Exp): Decimal points and whether to express in exponents for X-axis of the graph

 

Y Axis Deci. Pt. (Exp): Decimal points and whether to express in exponents for Y-axis of the graph

 

Octave Band Option: Use 1/3 Octave Band analysis method as a serviceability check method for evaluating floor vibration.

 

Maximum: Use the absolute maximum of the acceleration history for each frequency.

 

Effective: Use 1/? the absolute maximum of the acceleration history for each frequency.

 

Min Freq.: Use the minimum value (Hz) in the frequency band.

 

Max Freq.: Use the maximum value (Hz) in the frequency band.

 

Note

This function is activated only when Serviceability Check (Octave Band) is selected as Type.

 

 

Type

 

Select a graph type

 

Time History Graph: Time History Graph representing analysis results.

Modal Max Graph
: Frequency time history graphs representing the maximum values of individual modes.

Serviceability Check Graph(1991)
: When the serviceability of floor vibration is to be evaluated, a comparative graph is presented to assess the acceptability against the Japanese Regulation for serviceability performance evaluation.

 

Note
If Serviceability Check Graph is selected, the results are plotted against the standards for serviceability evaluation, using the maximum values and the predominant frequency obtained from the time history analysis.

 

Serviceability Check Graph(2004): The Japanese standard (Habitual performance evaluation specifications, 2004) is used to evaluate serviceability against the maximum response.

 

Note
The criterion for serviceability in the Japanese standard relates only to the amplitude of acceleration.  As such, only acceleration is supported as the output function type.  Error messages are generated if displacement other than acceleration is selected.
 

Serviceability Check (Octave Band): Check serviceability in graphs using the maximum acceleration for each frequency through the 1/3 Octave Band analysis method.

 

Note
This serviceability criterion relates only to the amplitude of acceleration. As such, only acceleration is supported as the output function type.  Error messages are generated if displacement other than acceleration is selected

 

: Display graphs for the selected functions.

 

   Context Menu

 

Right click on the graph displayed on the screen to prompt the following Context Menu. Using the Context Menu, various graphs can be expressed and data and images can be saved.

 

Change Title & Label

The title and subtitles to the x & y-axes may be changed.

 

Define Graph Origin/Resolution/Range...

Define various options (Origin, Resolution, Range, etc.) to be displayed in a graph.

 

Zoom Out

Drag the mouse over the part that is of interest to zoom in and click Zoom Out to restore the view.

 

Zoom Out All

Restore the very initial view of the graph. That is, revert to the view that contains all the ranges.

 

Time <-> Freq

Using the FFT algorithm, the time history graph is converted to the frequency history graph and vice versa.   

X Axis Log Scale

The X-axis of the graph is converted to Log Scale. Executing once again restores to the original state. (Toggle)

 

Y Axis Log Scale

The Y-axis of the graph is converted to Log Scale. Executing once again restores to the original state. (Toggle)

 

Save Graph As Image

Save the graph in the graphic file format of BMP, JPG or EMF.(default=BMP image)

 

Save Graph As Text

Save the graph in the format of a text file.

 

Save Graph As Excel

Export the graph data in the format of Excel Sheet.

 

 

Plot graphs for maximum displacement, velocity, acceleration and story drift at each story level.

 

 

When Displ/Vel/Accel by Story is selected in Define Function

 

 

 

Displ/Vel/Accel by Story

 

Name: Enter the name of a function defined for displacement.

 

Story: Select the story for which the time history graph is to be produced.

 

Type of Result: Select the type of results to be produced.

 

Disp: Displcement

 

Vel. : Velocity

 

Accel : Acceleration

 

Note
To define this function, a method for producing the story results should be defined first. The option is available at Model > Building > Control Data > "Story Response of Time History Results"

 

Relative: Select Ground for the reference point.

 

Absolute: Select Ground, which is prior to ground movement, for the reference point.

 

Inter-Story: Maximum story drifts at each floor

 

Note
When a roof floor is selected in the Story selection combo box, Story Drift function cannot be defined.

 

Components: Specify a component direction of displacements.

 

Note
The directions of displacements may be
DX or DY.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

: Once all the data entries are completed and is clicked, Function is created and saved in the list.

 

: Delete all the data entries and return to the previous Menu state.

 

 

When Displ/Vel/Accel is selected in Define Function

 

 

 

 Displ/Vel/Accel

 

Name: Enter the name of a function defined for displacement.

 

Node Number: Enter the node number.

 

Type of Result: Select the type of results to be produced.

 

Disp: Displacement

 

Vel. : Velocity

 

Accel : Acceleration

 

Reference Point: Select the reference point for

displacement/velocity/acceleration.

 

Ground: Select Ground for the reference point.

 

Add Ground Motion: Select Ground, which is prior to ground movement, for the reference point.

 

Another Node: Select a node for the reference point.

 

Components: Specify a component direction of displacements.

The directions of displacements may be DX, DY, DZ, RX, RY or RZ.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select a mode, which will be reflected in the calculation of time history results. Either all the modes or a single mode may be used.

 

: Once all the data entries are completed and is clicked, Function is created and saved in the list.

 

: Delete all the data entries and return to the previous Menu state.

 

 

When Truss Force/Stress is selected in Define Function

 

 

 

Truss Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history

 analysis results of a truss element.

 

Element No.: Enter the truss element number. Use the mouse to select or directly enter the number.

 

Type of Result: Select the type of results to be produced.

 

Force: axial force

 

Stress: axial stress

 

Point: Assign a position where the element analysis results are required.

I-Node or J-Node is selected.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select a mode, which will be reflected in the calculation of time history results. Either all the modes or a single mode may be used.

 

: Once all the data entries are completed and is clicked, Function is created and saved in the list.

 

: Delete all the data entries and return to the previous Menu state.

 

When Beam Force/Stress is selected in Define Function

 

 

  Beam Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a beam element.

 

Element Number: Enter the beam element number. Use the mouse to select or directly enter the number.

 

Type of Result: Select the type of results to be produced.

 

Force

 

Stress

 

Point: Assign a position where the element analysis results are required.

I-Node or J-Node is selected.

 

Components
The components vary depending on whether the Force or Stress is selected.

 

If Force is selected
the components may be selected from Axial, Shear-y, Shear-z, Torsion, Moment-y and Moment-z.

 

If Stress is selected
the components may be selected from Axial, Shear-y, Shear-z, Torsion, Moment-y and Moment-z.

 

Combine Axial
Normal stresses are produced on the basis of combined axial and bending stresses.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select a mode, which will be reflected in the calculation of time history results. Either all the modes or a single mode may be used.

 

: Once all the data entries are completed and is clicked, Function is created and saved in the list.

 

: Delete all the data entries and return to the previous Menu state.

 

 

When Plane Stress Force/Stress is selected in Define Function

 

 

 

Plane Stress Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a plane stress element.

 

Element Number: Enter the plain stress element number. Use the mouse to select or directly enter the number.

 

Type of Result: Select the type of results to be produced.

 

Force

 

Stress

 

Point: Assign a position where the element analysis results are required.

I-Node, J-Node, K-Node or L-Node is selected for Force Type.

 

Center, I-Node, J-Node, K-Node or L-Node is selected for Stress Type

Components
The components vary depending on whether the Force or Stress is selected.

 

If Force is selected
the components may be selected from Fx and Fy

 

If Stress is selected
the components may be selected from Sig-xx, Sig-yy and Sig-xy.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select the Mode(s) for calculating time history results. Select all or one of the Modes of eigenvalue analysis.

 

:  After completing the entry fields and clicking OK, Function is created and stored in the list.

 

:  It deletes all the data and reverts to the previous menu.

 

 

When Plane Strain Force/Stress is selected in Define Function

 

 

 

Plane Strain Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a plane strain element

 

Element Number: Enter the plain strain element number. Use the mouse to select or directly enter the number.

 

Type of Result: Select the type of results to be produced.

 

Force

 

Stress

 

Point: Assign a position where the element analysis results are required.

I-Node, J-Node, K-Node or L-Node is selected for Force Type.

 

Center, I-Node, J-Node, K-Node or L-Node is selected for Stress Type

Components
The components vary depending on whether the Force or Stress is selected.

 

If Force is selected
the components may be selected from Fx and Fy

 

If Stress is selected
the components may be selected from Sig-xx, Sig-yy and Sig-xy.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select the Mode(s) for calculating time history results. Select all or one of the Modes of eigenvalue analysis.

 

:  After completing the entry fields and clicking OK, Function is created and stored in the list.

 

:  It deletes all the data and reverts to the previous menu.

 

 

When Plate Force/Stress is selected in Define Function

 

 

 

Plate Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a plate element.

 

Element Number: Enter the plate element number. Use the mouse to select or directly enter the number.

 

Forc.: Element force

 

Strs.: Stress

 

Unit Forc.: Element force per unit length

 

Point: Assign a position where the element analysis results are required.

I-Node, J-Node, K-Node or L-Node is selected for Force Type.

 

Center, I-Node, J-Node, K-Node or L-Node is selected for Stress Type

Components
The components vary depending on whether the Force, Stress or Unit Force is selected.

 

If Force is selected
the components may be selected from Fx, Fy, Fz, Mx, My and Mz.

 

If Stress is selected
the components may be selected from Sig-xx (Top), Sig-yy (Top), Sig-xy (Top), Sig-xx (Bottom), Sig-yy (Bottom) and Sig-xy (Bottom).

 

If Unit Force is selected
the components may be selected from Fxx, Fyy, Fxy, Mxx, Myy, Mxy, Vxx, and Vyy.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select the Mode(s) for calculating time history results. Select all or one of the Modes of eigenvalue analysis.

 

:  After completing the entry fields and clicking OK, Function is created and stored in the list.

 

:  It deletes all the data and reverts to the previous menu.

 

 

When Solid Force/Stress is selected in Define Function

 

 

 

Solid Force/Stress

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a solid element

 

Element Number: Enter the solid element number. Use the mouse to select or directly enter the number.

 

Type of Result: Select the type of results to be produced.

 

Force: Element force

 

Stress: Stress

 

Point: Assign a position where the element analysis results are required.

I-Node, J-Node, K-Node, L-Node, M-Node, N-Node, O-Node or P-Node is selected for Force Type.

 

Center, I-Node, J-Node, K-Node, L-Node, M-Node, N-Node, O-Node or P-Node is selected for Stress Type.

 

Components
The components vary depending on whether the Force or Stress is selected.

 

If Force is selected
the components may be selected from Fx, Fy and Fz.

 

If Stress is selected
the components may be selected from Sig-xx, Sig-yy, Sig-zz, Sig-xy, Sig-yz and Sig-xz.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

Include Mode Number

Select the Mode(s) for calculating time history results. Select all or one of the Modes of eigenvalue analysis.

 

:  After completing the entry fields and clicking OK, Function is created and stored in the list.

 

:  It deletes all the data and reverts to the previous menu.

 

 

When General Link Deform/Force is selected in Define Function

 

 

 

General Link Deform/Force

 

Name: Enter the name of a function to be plotted by using the time history analysis results of a general link element.

 

GL-Link No.: Enter the general link element number. The start and end node numbers are indicated in brackets to help you select the element number.

 

Type: Select one among Deformations of General link element, Member forces at the start node and Member forces at the end node.

 

Deformation

 

I-Node Force

 

J-Node Force

 

Components: Select a component out of the ECS 6 degrees of freedom of the selected Type.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

: Once all the data entries are completed and is clicked, Function is created and saved in the list.

 

: Delete all the data entries and return to the previous Menu state.

 

 

When Inelastic Hinge Deform/Force is selected in Define Function

 

 

 

Inelastic Hinge Deform/Force

 

Name: Enter the name of a function to be plotted by using the time history analysis results of an inelastic beam element.

 

Element Number: Enter the inelastic beam element number. In order to help us select the element number, the start and end node numbers of the elements are noted in the brackets

 

Type of Result

 

Deformation: Deformation of the inelastic beam element

 

Force: Force of the inelastic beam element

 

Components
The components vary depending on whether the Force or Stress is selected.

 

If Deformation is selected
the components may be selected from Dx, Dy, Dz, Rx, Ry and Rz.

 

If Force is selected
the components may be selected from Axial, Shear-y, Shear-z, Torsion, Moment-y and Moment-z.

 

Location

It varies with Inelastic Hinge Type.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

:  After completing the entry fields and clicking OK, Function is created and stored in the list.

 

:  It deletes all the data and reverts to the previous menu.

  

  

When Load Incremental History is selected in Define Function

 

 

 

 

Load Incremental History

 

Name: Enter the name of a function defined for Load Incremental History.

 

Time History Load Case

Select a load case for which time history graphs will be drawn.

 

: After completing the entry fields and clicking OK, Function is created and stored in the list.

 

: It deletes all the data and reverts to the previous menu.

 

Note

When a time history load case is Nonlinear Static, display the load incremental factor as a time function.

To generate the analysis results with the load incremental factor for the Nonlinear Static load case, select Load Incremental History function as the Horizontal Axis of Time History Graph.