Transverse Stiffeners are provided to increase buckling resistance of the web due to inclined compressive stress due to shear, It is provided vertically along the span.
Horizontal Stiffener / Longitudinal Stiffener is designed to prevent web buckling due to bending compression.
Both traverse and longitudinal stiffeners are provided to check the web buckling.
End Bearing Stiffeners are provided at the supports & Load Bearing Stiffeners are provided at the points of concentrated loads.
Important Point:
If
<67ε ⇒ unstiffened girder can be designed i.e. No girder required.
If
85ε<<200ε ⇒ Vertical stiffener (C1 and C2) may be provided.
If
200ε<<250ε ⇒ Vertical stiffener along with longitudinal stiffener at
0.2d may be provided.
If
250ε<<345ε ⇒ Vertical stiffeners along with two longitudinal stiffeners at
0.2d and
0.5d respectively may be provided.
If
≤400ε ⇒ End bearing stiffeners, intermediate transverse stiffeners, longitudinal stiffeners at
0.2d from compression face and at neutral axis are needed.