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How are 1D and 2D results considered/calculated?

Overall convention of signs of normal forces and stresses

Positive value = Tension

Negative value = Compression

Only exception in Subsoils (contact stresses sigma,z):

Positive values = Compression

Negative values = Tension

 

1D members

Convention of internal forces of 1D members in SCIA Engineer

 

2D members

1) Basic magnitudes = characteristic values

Bending (plates, shells)

Bending moments mx, my

Convention of bending moments mx and my in SCIA Engineer

 

Torsion moment mxy

Convention of torsion moment mxy in SCIA Engineer

 

Shear forces qx, qy (= vx, vy)

Convention of shear forces vx and vy in SCIA Engineer

 

Membrane effects (walls, shells)

Membrane forces nx, ny

Convention of membrane forces nx and ny in SCIA Engineer

Shear force qxy (= nxy)

Convention of shear force nxy in SCIA Engineer

Basic stresses on 2D

Calculation of basic stresses of 2D members in SCIA Engineer

 

2) Principal magnitudes

The principal magnitudes give the results according to the axes of the directions of the largest stresses (principal directions). These directions are defined with the help of the Mohr’s circle:

Mohr's circle

Principal moments – plate

Calculation of pricinpal moments of plates in SCIA Engineer

Principal forces – wall

Calculation of pricinpal forces of walls in SCIA Engineer

Principal stresses on 2D

Calculation of pricinpal stresses of 2D members in SCIA Engineer

3) Dimensional magnitudes = design values

To derive the dimensional magnitudes from the basic magnitudes, formulas from the Eurocode are used.

Dimensional moments from EC2 – plate

Determination of dimensional moments from EC2 for plates in SCIA Engineer

Dimensional moments, classical method – plate

Determination of dimensional moments from classical method for plates in SCIA Engineer

Dimensional forces from EC2 – wall

Determination of dimensional forces from EC2 for walls in SCIA Engineer

Dimensional forces, classical method – wall

Determination of dimensional forces from classical method for walls in SCIA Engineer