Summary Structural Design 3

Structural Design 3
2025 – 2026 – Mario Rinke, Ilke Kerkhofs


Steel
Historical overview




1760: introduction of cast iron as construction material in Europe

è Form of connections (nails etc.)

1779: first full cast iron structure -> Iron bridge

Mechanical Properties
N = Axial force (N)

l = initial length (mm)

A = Area of cross-section (mm2)

Δl = Elongation (mm)

k = N/ Δl

N = k* Δl

K = E*A/l

N = (E*A/l)* Δl. -> E = Young’s modulus (N/mm2) = stiNness

N/A = E* Δl/l. -> Δl/l = Strain e (%)

N/A = Stress s (N/mm2)

s = E*e




Stress – Strain diagram ->

, Elastic / Plastic behaviour

Elastic -> returns to original
form after force gets removed

Plastic -> Forces partially break
crystal grid (deformation)




Building technologies
Steel Profiles




Mode of connection