The dimensions of a pier footing are assigned. The boundary lines of the pier footing are drawn according to the assigned dimensions. The symbols T and EA are the thickness of the pier footing and the number of columns. The symbols LD1, LD2, and LD3 are the center-to-center distances of two columns in the pier coping supported by two, three, and four columns, respectively.
The type of pier footing, coefficients of soil or pile reaction per unit area, and number of piles in two horizontal directions are assigned. Two foundation types (Spread Footing, Pile Footing) are provided.
The loads from column(s) are assigned. After assigning the load names, they can be altered, added, or deleted in the DEFINE-Static Load. The positive values for vertical loads must be assigned. The positive horizontal loads are set as the forces acting from left to right. The negative horizontal loads are set as the forces acting from right to left. The positive and negative moments are set as the clockwise and counterclockwise moments, respectively.
The number of nodes under column, three reference distances B, C, and D, and the slope of inclined element are assigned for the automatic construction of the strut-tie model for pier footing.
The areas of reinforcing bars assigned to the pier footing below are recognized as the areas of the steel ties of the strut-tie model for pier footing. The information on the reinforcing bars can be altered, added, or deleted in the DEFINE-Tie Types-Reinforcement Ties. The information can be assigned to the elements of the strut-tie model in the ASSIGN-Tie Types.