3.7.1.2: Load-Case Selector
The "Load-Case Selector"-component helps in creating selection strings which define what load-case result to output for each point of a model. A selection string (see fig. 3.7.1.2.1. top right) starts with the name of the load-case-combination to select from and contains zero or more selection specifiers separate by "/". It can be supplied as the "LCase"-input for all result components and comes out at the component's "LCase" output-plug. The selection string is stored in the model which results at the "Model"-output-plug and serves as the default selection for ensuing result-retrievals. The model's default selection shows up in its string representation (see fig.3.7.1.2.2, bottom right).
Fig. 3.7.1.2.1 shows a beam on two supports with two load-cases "q1" and "q2". "q1" contains a constant upward load of 1kN/m at the cantilevering parts. "q2" acts downwards on the span between the supports. Two load-case-combinations "SLS" and "ULS" exist which combine the load-cases "q1" and "q2" into four combined load-cases each (see bottom right panel of fig. 3.7.1.2.1).
The input-plug "Model" receives the model from which to select results. In the drop-down menu under "Load Case Combi" one can select from among the active load-case-combinations. Active load-case-combinations are those which were selected for analysis in e.g., an upstream "Analyze"-component. When placed directly after an "Assemble"-component all load-cases and load-case-combinations are assumed to be active. With the input "LCInd" it is possible to select from the current load-case-combination a load-case of specific index. The indexes are zero-based and correspond to the order in which a load-case-combination gets disassembled (see section "Disassemble Load-Case-Combination"). Selection via index overrides queries for minimum or maximum values of a response property.
The "Min" and "Max" radio buttons in submenu "Min/Max" let you select between minimum and maximum result values. By default, both are active. Without the specification of a leading property (see explanation below) this results in the output of the envelope of all response properties. In case of result vectors (think of displacements) the hull gets computed for each component separately. Without a selection of "Min", "Max" or load-case index via "LCInd" results for all load-cases of a load-case-combination will be output.
The maximum and minimum result envelops generally do not occur in the same load-case. For detailed design they should therefore be used cautiously.
The submenus "For Beams", "For Shells", "For Displacements" and "For Supports" offer a more fine grained access to the result properties of load-case combinations (see fig. 3.7.1.2.1). For the groups of response quantities that come with beams, shells, displacements and supports a leading property can be selected - like "My" in fig. 3.7.1.2.2. The output of the other quantities of the response group will then be the accompanying ones.
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