1. Presentation

The sd_cabl_precont data structure is produced by the operator DEFI_CABLE_BP [U4.42.04]. This operator calculates the initial tension profiles along the prestress cables of a concrete structure, knowing the tension applied at the ends and other characteristic parameters of the anchors and materials. Each cable is defined by an occurrence of the keyword factor DEFI_CABLE. It also calculates the kinematic relationships between concrete and cables.

The sd_cabl_precont data structure is then used by the operator AFFE_CHAR_MECA [U4.44.01], in order to define a mechanical loading of type RELA_CINE_BP, in order to calculate the equilibrium state of the concrete structure/prestress cables set. The resolution is done by the operator STAT_NON_LINE [U4.51.03], option COMPORTEMENT.

The sd_cabl_precont data structure includes two tables, an elementary map (map of initial constraints) and a list of relationships (kinematic relationships between the degrees of freedom of cable nodes and the degrees of freedom of their nodes « neighboring » the concrete structure).