Action > UltSup

Performs an ultimate limit check for the specified envelope based on the stress-strain diagrams of the materials and calculates if requested the required reinforcement amount (ULS reinforcement design).

Note: Material safety factors and strain limits cannot be defined locally in this function. They must be worked-in into the defined stress-strain diagrams (diagram for ultimate load check) of the used materials. i.e. the yield stress must be reduced by the safety factor and the diagram must be defined exactly from the negative to the positive strain limit. The geometric positions of any reinforcement groups must be specified as Reference-Sets of the cross-sections.

Setting	Description
Action	Code of the selected Action. It is possible to switch to another action without leaving and re-entering the input function.
Action will be skipped (Option)	The action will be skipped in the calculation process if the option is selected.
Input-1 > Superposition file name	Name of the superposition file to be used for the ultimate capacity check or reinforcement design (ULS combination). Note: For sections with built-in stresses due to stage-wise erection, the program takes the "joined" results. I.e. it is assumed, that in-built stresses will be redistributed in the ultimate limit state such that their distribution corresponds to the built-in-one state (plane strain in the composite section).
Input-1 > UltNxMyMz\|\|Rein	Selection of the sub-function to be performed Ult: Ultimate load check for the current cross section for forces from specified envelope. The program calculates the plastic strain state yielded by the defined ULS combination. Nx: Capacity calculation normal force. Defines max/min Nx for My, Mz of ULS combination. My: Capacity calculation My. Defines max/min My for Nx, Mz of ULS combination. Mz: Capacity calculation Mz. Defines max/min Mz for Nx, My of ULS combination. Rein: Option for performing a reinforcement design if additional mild steel reinforcement is required for equilibrium within ultimate strain limits.
Input-2 > (Initial strain loadcase)	Optional entry. Name of the load case, which is used to calculate the initial strain of the tendons (translation in stress-strain curve for ultimate load analysis). Note: If a * is entered the program takes the initial tendon strains from the superposition 1; if empty (default), from the summation load-case specified in the Recalc pad.
Input-3 > (RmSet)	Required for ultimate limit checks for columns with consideration of shape imperfections (in acc. (with OENORM and DIN). All required parameters have to be prepared in the RmSet: Accidental imperfection as RM-Variable (formula as specified in the design code) Geometric parameters (buckling length, definition of element series) for buckling around Y Geometric parameters (buckling length, definition of element series) for buckling around Z
Input-3 > (Force Component)	Total:Normal - for non-composite elements (for composite this option gives the joined results) Total:Split - for part elements of composites Total:Join - for composite elements.
Output-1 > (Superposition file)	Optional entry. Name of a superposition file for storing the calculated capacity values. Not used for reinforcement design and standard ultimate load check. If the file already exists, the capacities will be superimposed with SupOr. This allows for gathering the least favorite capacity values (Nx, My, Mz) in a common superposition file.
Output-2 > List File	Name of list file, whereto results of fiber stress check/ reinforcement design will be written. Default (*): xxULS.lst with xx denoting the sub-function (ult, rei). i.e we get the name ultULS.lst if an ultimate check and capacity calculation is performed, and the name reiULS.lst if a reinforcement design is performed. No listing file will be created if there is no input.
Delta-T	Duration of the Action (not applicable for this action)
Description	Descriptive text for the selected Action (max. 80 characters)

Elements, for which an Ultimate Load Check or Reinforcement Design design shall be performed or not,have to be selected in Menu Structure > Element > Checks > Ult (Ultimate Load Checks).

Note: The definition of the design standard in the Recalc pad has no influence on the calculations performed in this action, just the stress-strain diagram of the material which must be in accordance with the required design code regulations. Any particularities with respect to pier dimensioning (consideration of buckling hazard and accidental shape deviations) are considered in accordance with the type of the assigned RmSet, independent of the standard selected in the Recalc pad.