Skip to main content
Forces Created Edited

Beam Diagrams


  • Check Shear Force Diagram (SFD) and Bending Moment Diagram (BMD) for beam elements.
  • In the case of performing P-Delta analysis, the internal displacements of the beam are calculated to obtain accurate bending moments.


NOTE.png In P-Delta analysis, the moments at internal points of the beam, excluding the endpoints, should be calculated by considering the additional moments generated by the product of displacements at both endpoints and the P-Delta load. This calculation is necessary for accurate results. Previously, this calculation was not incorporated as it required determining the displacements at arbitrary points inside the beam. However, by improving the analysis, it is now possible to calculate the displacements at internal points and accurately calculate the moments in P-Delta analysis.

This feature is applicable only to beam elements.



From the main menu, select [Results] tab > [Type : Anslysis results] > [Result Display] group > [Forces] > [Beam Diagrams]



Results-Results-Forces-beam diagram.png

Beam Diagrams dialog box


Load Cases/Combinations

Select a desired load case, load combination or envelope case.

The Construction Stage applicable for the output of the construction stage analysis is defined in Select Construction Stage for Display or Stage Toolbar. Click ....png to the right to enter new or modify existing load combinations. (Refer to "Load Cases / Combinations")

When results are produced in max, min and all in such cases as moving loads, support settlements, time history analysis and Envelope load combinations, selecting "all" produces beam diagrams displayed in absolute values of member forces irrespective of the signs of member forces. In order to produce beam diagrams reflecting the signs, check on "Consider Signs in Load Combination Type of Envelop "all" of Tools>Preference>Environment>Results.


Specify the step for which the analysis results are to be produced. The Step is defined in geometric nonlinear analysis as Load Step, and additional steps are defined in the construction stages of bridges or heat of hydration analyses.

The Construction Stage applicable for the output of the construction stage analysis is defined in Select Construction Stage for Display or Stage Toolbar.

Max/Min Diagram

When checking the "THall, MVall Load Case" or "Envelope All" options, both the Max and Min diagrams are displayed simultaneously. If unchecked, the diagram displays the value with the greatest absolute magnitude among the Max and Min values.

1. If Envelope/all is selected, 'Max/Min Diagram' becomes activated. If the option is unchecked, a Diagram with absolute maximum values of Envelope is generated.

2. [Moving load analysis to AASHTO LRFD] When midas Civil envelops maximum and minimum results, two design truck scenario is considered for the negative moment and reaction only. In other words, although the maximum shear or axial force effects are found under two truck loading, midas Civil will disregard them and present the force effects from a single truck scenario. For example, if a single truck results in the maximum axial force -240 kips and double trucks result in the maximum axial force of -450 kips, midas Civil will report -240 kips in the min/max envelope results.



Select the desired member force component among the following:

Part : Select a specific part for which member forces will be produced. This function is activated when parts are defined in the Composite Section for Construction Stage.

Fx : Axial force in the element's local x-direction

NOTE.png When axial force (Fx) is selected, and "Show Truss Force" is checked, truss member forces are simultaneously produced. When axial force (Fx) is selected and "Only Truss Force" is checked, only the truss member forces are generated.

Mx : Torsional moment about the element's local x-axis

Fy : Shear force in the element's local y-direction

Fz : Shear force in the element's local z-direction

Fyz : Shear forces, Fy & Fz displayed simultaneously

My : Bending moment about the element's local y-axis

Mz : Bending moment about the element's local z-axis

Myz : Bending moment, My & Mz displayed simultaneously

Mb : Bi-moment

Mt : Twisting moment

Mw : Warping moment

NOTE.png If the 7-degree-of-freedom option is not selected in the Section Property, the options related to the 7-degree-of-freedom component forces will not be activated.

Show Truss Force : Output option to produce truss member forces simultaneously. In the case of cable bridges, it is possible to simultaneously examine the member forces of both the girders and the cables.

Only Truss Force : Output option to produce truss member forces only


Display Options

Exact : Display the member forces calculated by the Detail Analysis process all along the length of each beam element including both end nodes.

NOTE.png Exact option is applicable to linear static analysis only. Thus, the option is inactivated when moving load cases, nonlinear analysis load cases or Envelope load combinations are selected.

5 Points : Display the member forces calculated at both end nodes and the quarter points of each beam element. The diagram is presented by connecting the 5 points.

No Fill : Display only the outline representing the magnitudes of the member forces.

Line Fill : Display the diagram filled in with color lines.

Solid Fill : Display the diagram filled in with color surfaces.

Scale : Drawing scale for member forces.


Type of Display

Define the type of display as follows:



Display the displacement of the model in contour.



Ranges : Define the contour ranges.

Customize Range : Assign the color distribution range of contour. Using the function, specific colors for specific ranges can be assigned.

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.

Customize Color Table : 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.

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).



Display the deformed shape of the model.



Deformation Scale Factor
Magnify or reduce the size of the displacement graphically displayed in the model window.

Deformation Type
Select the type of display for displacement

Nodal Deform : Display the deformed shape only with nodal displacements.

Real Displacement (Auto-Scale off) : The true deformation of the structure is graphically represented without magnifying or reducing it. This option is typically used for geometric nonlinear analysis reflecting large displacement.

Relative Displacement : The deformation of the structure is graphically represented relative to the minimum nodal displacement, which is set to "0"



Display the forces/moments of plate elements 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 internal forces relative to the selected maximum or minimum value

Set Orientation : Display orientation of numerical values

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.



Display various references related to analysis results to the right or left of the working window.

Element numbers pertaining to the maximum and minimum forces are displayed.



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



Dynamically simulate the forces/moments of plate elements.

Click the Apply button then click the Record button to the right of the Animation control board at the bottom of the working window.



Animation Mode : Determine the type of animation for analysis results.

Animate Contour : Option to change the color of the contour representing the transition according to the magnitudes of variation

Repeat Half/Full Cycle : Select the repetition cycle for the dynamic representation of the transition

Select 'Half Cycle' for the transient shapes of a structure and 'Full Cycle' for dynamically simulating vibration modes or buckling modes.

AVI Options : Enter the options required to produce animation window.

Bits per Pixel: Number of bits per pixel to create the default window for animation

Compressor: Assign the method of compressing image data

Frames per Half Cycle (3~300) : Number of frames to simulate a 'Half Cycle'

Frames per Second (5~60) : Number of frames per second to present dynamic simulation

Construction Stage Option : Select the animation options when the construction stage analysis is performed.

Stage Animation : Animations by construction stages

Current Stage-Step : Animations by Steps in the current construction stage

From ~ To : Starting and ending construction stages or steps for animations


Undeformed : Overlap the undeformed and deformed shapes of the model.



"Mirrored" allows the user to expand the analysis results obtained from a half or quarter model into the results for the full model by reflecting planes.



Half Model Mirroring

Quarter Model Mirroring

Mirror by : Specify the mirror plane (s) by designating a plane and a coordinate in the direction perpendicular to the plane in GCS.


Quick View

Display the Beam Force Detail Diagram for an element in a separate window.



Element : Enter an element number for which the member forces are generated. Or click the entry field and the relevant element in the Model View.

Load Case : Select a desired load case or load combination.

Select Load/Step/Comp.

Step : Specify the step for which the analysis results are to be generated.

Component : Select a desired member force component.

Result Value

Display the member forces at I-End & J-End, and maximum & minimum values of the selected element.

Value : Move the mouse cursor in the diagram to display member forces at the corresponding position.

Total Length : Display the length of the element.


Output Section Location

Assign the section locations at which member forces of the beam elements are produced in numerical values.

I : Display the member force at the start node (N1) of a beam element.

Center : Display the member force at the center of a beam element.

J : Display the member force at the end node (N2) of a beam element.

Abs Max : Maximum absolute values of member forces among the 5 points of (4-sectioned) beam elements are displayed at the centers of the beam elements.

Min/Max : Minimum and maximum member forces are numerically displayed at the corresponding locations among the 5 points of (4-sectioned) beam elements.

All : The member forces at the i-end, center and j-end are numerically displayed.


Batch Output Generation

Given the types of analysis results for Graphic outputs, generate consecutively graphic outputs for selected load cases and combinations. A total number of files equal to the products of the numbers of checked items in the three columns of the dialog box below are created.

Batch_Output_Generation___.png : Batch Output Generation : Assign a Base File Name under which the types of results (selection data in the Batch Output Generation dialog box for graphic outputs) are stored.

Batch_Output_Generation___.png : Batch Output Generation : Specify the Base Files to perform Batch Output Generation, construction stages, load cases (combinations), steps, etc. in the following dialog box.


Results-Results-Forces-beam diagram-batch output generation.png


Saved Menu-Bar Info's : Listed here are the Base Files. Select the Base File Names for Batch Output.

Delete the selected : Delete all the Base Files selected with the mouse.

When the construction stage analysis is carried out, all the construction stages are listed. We simply select the stages of interests to be included in the batch output. If no construction stage analysis is performed, the column in the dialog box becomes inactive and lists load (combination) conditions.


The results output of all the construction stages are produced. The construction stages are listed below.

Final Stage Loads

The results output for only the Final Stage are produced. The construction stages are listed below. If no construction stage analysis is performed, the load (combination) conditions are listed.

Use Saved

Apply only the (saved) step or load (combination) condition selected at the time of creating each Base File.


Stage LCase/LComb

When the construction stage analysis is carried out, the auto-generated construction stage load conditions and the additionally entered construction stage load combinations are listed. Check on only the load (combination) conditions that will be used to produce batch outputs. This column becomes inactive if "Post CS Loads" is selected or no construction stage analysis is carried out.

Step Option

Specify the steps for which the outputs will be produced when the construction stage analysis or large displacement geometric nonlinear analysis is performed.

Saved Step : Use only the steps used for creating the Base Files

All Steps : Use all the steps


Output Options

Output File Type

Select a Graphic File type, either BMP or EMF.

Auto Description : At the top left of the Graphic Outputs produced in batch, auto-generate and include the notes such as the types and components of the analysis results, construction stages and steps, load (combination) conditions, etc. The font size, color, type, etc. can be changed upon clicking the ....png button.

Output Path

Specify the path for saving the graphic files to be produced in batch.

File Prefix : Specify the prefix of the Graphic Files to be created. The filenames will be consisted of "Prefix"_"Base File Name"_"Load Comb.".bmp(emf) or "Prefix"_"Base File Name"_"Stage"_"Stage LCase"_"Step".bmp(emf).


Make Output : Produce the specified batch Graphic Files reflecting the contents of the dialog box.

Export / Import

Produce the contents of data input in the Base Files and Batch Output Generation dialog box in a binary type file (fn.bog). Click the Import button and select a fn.bog to use the same output format.

NOTE.png Import /Export is only meaningful for different projects. In a given structural model, the Base Files are automatically stored and listed.

Was this article helpful?