Concurrent Force/Displacement Requests
Concurrent Force/Displacement Requests allows users to obtain concurrent forces or displacements on any element for any selected result type. The input fields are explained below, followed by example use cases.
Maximize For: Specify the direction to maximize. The available directions are aligned with the axes defined for the selected Maximized Element Result Type.
Maximized Element: Enter the element name for which the result will be maximized. This is a text input field. The element name can be copied directly from the results table or from the element whose result you want to read.
Maximized Element Result Type: Select the result type for the element. This determines which force or displacement component will be used for maximization.
Maximized Node: Select the node of the element where the maximization will occur. This field is available only for result types that are node-based.
Maximized Position (Length): Specify the position along the element length to be maximized. This field is only available when the result type is Composite Element Forces.
Result Element: Enter the element from which the concurrent result will be read. The element name can be copied directly from the results table.
Result Element Result Type: Select the result type to be read on the result element.
Result Node: Select the node of the result element from which the value will be extracted. Availability depends on the selected result type.
Result Position (Length): Specify the position along the result element length. This field is only available when the result type is Composite Element Forces.
Result Unit Category (Read-only): Displays the unit category of the result based on the selected Result Element Result Type.
EXAMPLES
The following examples are demonstrated using the model available at: Example Steel I Girder Bridge.
Example 1:
Maximize the axial force in a column and read the corresponding forces on the bearings at the Pier 3 support line. Shown in Figure 1.
Element names are shown in Figure 2.
Select the appropriate maximization direction and result type. For example, to maximize the axial force in a line element along its local axis, select Fx–Tx for Axial Force and FELines Forces (Internal) for local-axis results.
For the result element, the bearings are represented as springs, so select the corresponding spring element and result type accordingly.
Results are displayed in separate spreadsheets, grouped by result unit type (Force or Displacement). Both forces and displacements can be viewed for each construction stage, load combination, and other analysis cases.
Detailed results are shown in Figure 5. Red lines represent the condition where the axial force in the selected element is minimum, while blue lines represent the condition where the axial force is maximum.
For this example, focusing on the minimum results is more meaningful, as negative axial force in the local axis corresponds to compression; therefore, the minimum concurrent results provide insight into the most critical compressive condition in the bearings.
Example 2:
Maximize the lateral force in a bearing and read the concurrent results from the same element.
To read results from the same element, both the Maximized Element and Result Element fields must be set to the same element.
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