When calculating in RF-CONCRETE, I get the results split in directions 1, 2, and 3. What is the general definition of the reinforcement directions?


The position of the reinforcement is defined in RFEM as follows:

1.) Directions 1,2 and 3

The directions 1,2, and 3 for results of RF-CONCRETE Surfaces are the reinforcement directions. Directions 1 and 2 correspond to the directions of the local axes x and y. Direction 1 corresponds to the local x-axis, direction 2 to the local y-axis (provided that no rotation angle is defined for the reinforcement: n1 = x and n2 = y with phi1 = 0° and phi2 = 90°).

A rotation angle would then define axis 3.

The angle can be adjusted in Table 1.4 of RF-CONCRETE Surfaces, in register Reinforcement Layout.

For internal forces, the designations 1 and 2 are the principal axis directions.

2.) Top/Bottom for Reinforcement (Global Z-Axis, bottom )

Since RFEM can also calculate and design three-dimensional structures, the description for reinforcement layers must be oriented to the local surface axis systems.

Top means on the side of the surface opposite to the positive local z-axis direction. Accordingly, the bottom position in the + z-direction is defined by the local coordinate system. For better differentiation from the global coordinate system (X, Y, Z), it is identified with lowercase letters.

The x- and y-axes lie on the surface, the z-axis is perpendicular to the surface. You can display the local axis system as follows:

- Activate the Display navigator on the left side of the screen (it is possible to set all display features in a tree-like structure)

- Open the path 'Model > Surfaces' and activate the checkbox in front of the entry 'Surface Axis Systems x, y, z.'

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RFEM Concrete Structures

Add-on Module

Design of reinforced concrete members and surfaces (plates, walls, planar structures, shells)

Price of First License
810.00 USD
RFEM Main Program
RFEM 5.xx

Main Program

Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements

Price of First License
3,540.00 USD