Beam Detail Analysis

Produce a detail deformed shape, SFD/BMD, maximum stress distribution and sectional stress distribution diagrams for a particular section.

From the Main Menu select Results > Beam Detail Analysis.

Select Results > Beam Detail Analysis in the Menu tab of the Tree Menu.

 Load Cases/Combinations

Select a desired load case or load combination.

Click to the right to enter new or modify existing load combinations. (Refer to "Load Cases / Combinations")

Element Number
Enter the element number for which a detail analysis is desired, or click the element number entry field and the relevant beam element in the working window.

Note
Beam Detail Analysis finds forces for moving load cases, load combinations including moving loads and envelope load cases by interpolating the values at i, 1/4 points, midpoint and j node.

When the element is assigned, the following results window is displayed.

Deformed shape in the element's local z-direction and SFD/BMD

DISP/SFD/BMD z-dir. Results Window

Produce deformed shape, SFD and BMD for the beam element's strong axis

Displacement: Dz
Deflected shape in the element's local z-direction and the corresponding numerical values

Di (abs) : Absolute displacement at node i (N1)

Dj (abs) : Absolute displacement at node j (N2)

Di (rel) : Relative displacement at node i (N1)

Dj (rel) : Relative displacement at node j (N2)

Note
The relative displacement is obtained by setting the smaller displacement of nodes i or j to 0 (zero) and calculating the relative displacement of the other node.

Dmax (abs) : Maximum absolute displacement and the position

Dmax (rel) : Maximum relative displacement

Dmin (abs) : Minimum absolute displacement and the position

Dmin (rel) : Minimum relative displacement

Duser (abs) : Absolute displacement and the position at the location assigned by the user

Duser (rel) : Relative displacement and the position at the location assigned by the user

Note
Move the mouse cursor to the left or right in the displacement graph or use the slide button at the bottom of the results window to assign the position of interest.

Shear Force Diagram: Fz
Shear force in the element's local z-direction and the corresponding numerical values

Fi: Shear force at node i

Fj: Shear force at node j

Fmax: Maximum shear force and the position

Fmin: Minimum shear force and the position

Fuser: Shear force and the position at the location assigned by the user

Bending Moment Diagram: My
Bending moment about the element's local y-axis and the corresponding values

Mi: Bending moment at node i

Mj: Bending moment at node j

Mmax: Maximum bending moment and the position

Mmin: Minimum bending moment and the position

Muser: Bending moment and the position at the location assigned by the user

Deformed shape in the element's local y-direction and SFD/BMD

DISP/SFD/BMD y-dir. Results Window (Refer to DISP/SFD/BMD z-dir. Results Window)

Produce the deformed shape, SFD and BMD for the beam element's weak axis

Displacement: Dy
Deflected shape in the element's local y-direction and the corresponding numerical values

Shear Force Diagram: Fy
Shear force in the element's local y-direction and the corresponding numerical values

Bending Moment Diagram: Mz
Bending moment about the element's local z-axis and the corresponding numerical values

Detail section stress

Section Results Window

Entry

Section Stress
Select a stress component and the corresponding member force components in the dialog bar of Beam Detail Analysis and click .

Stress components

Normal
Stress in the element's local x-direction ( )

Axial stress + Bending stresses due to My and Mz

Tau-xy: Shear stress in the element's local y-direction ( )

Tau-xz: Shear stress in the element's local z-direction ( )

von-Mises

von-Mises Stress =

where,

 : Maximum principal stress

 : Minimum principal stress

Tresca

Tresca Stress =

Member Force Components

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

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

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

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

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

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

Output

Longitudinal Maximum Stress
Provide the maximum and minimum distribution diagram and the corresponding numerical values for the assigned stress

component along the length of a beam.

Sig-i: Maximum section stress at node i (N1) ( )

Sig-j: Maximum section stress at node j (N2) ()

Sig-max: Maximum stress and the position ()

Sig-min: Minimum stress and the position ()

Sig-user: Maximum stress at the location assigned by the user ()

Note
Move the mouse cursor to the left or right in the maximum stress graph to assign the position of the stress to be checked.

Cross Section Stress
Display the stress distribution and the corresponding values for a particular section of the beam element.

Sig-max: Maximum stress and the position in the section ()

Sig-min: Minimum stress and the position in the section ()

Sig-user: Stress at the position assigned by the user ()

Assign the desired position (on the element's local y-z plane) in the section stress distribution diagram by moving the mouse cursor to the left or right and up or down. In addition, assign the desired position along the length (in the element's local x-axis) by moving the mouse cursor to the left or right in the maximum stress graph.

Location

abs: Distance from the i node to the position assigned by the user

rel (X/L): Distance ratio relative to the total length for the position assigned by the user

Applied Forces/Moments [Fx, Fy, Fz, Mx, My, Mz]: Member forces at the position along the length assigned by the user

Note

When stress checks are required for a tapered section, its section information such as DB/User and PSC(DB) types is required to produce stresses at the positions (1/4, 1/2 & 3/4). In contours, diagrams and tables, section properties at the positions (1/4, 1/2 & 3/4) are obtained by interpolation between i-end and j-end. Whereas in Beam Detail Analysis, the section properties at the positions (1/4, 1/2 & 3/4) are re-calculated using the section shape information at the corresponding positions. If section properties are not defined in a section, stress results will not be generated.