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Fatigue tests of stiffener to cross beam connections

Essais de fatigue de liaisons entre raidisseur et entretoise : Versuche zur Ermüdung des Anschlusses einer Steife an einen Querträger
: Lehrke, H.-P.

International Association for Bridge and Structural Engineering -IABSE-, Zürich:
Remaining fatigue life of steel structures. IABSE Workshop Lausanne 1990
Zürich, 1990
ISBN: 3-85748-060-9
pp.249-257 : Abb.,Lit.
International Association for Bridge and Structural Engineering (Workshop) <1990, Lausanne>
Conference Paper
Fraunhofer LBF ()
Betriebslastensimulation; bridge construction; Brückenbau; Festigkeitsbeurteilung; Finite-Elemente-Methode (FEM); Mehrstufenbeanspruchung; operational load simulation; random test; Spannungsverteilung; strength evaluation; stress distribution; traffic load; variable amplitude loading; Verkehrslast; Versteifung; Zufallslastenversuch

Traffic loads produce high stress concentrations leading to fatigue cracking at the edges of cutouts in webs of cross beams. High local stresses can be reduced by improved shaping of cutouts. Fatigue tests were performed using two types of specimens; one with a commonly used shape of cut-out and the other with a new shape. The results showed a considerable increase of fatigue life for the new shape. However residual stresses of unknown distribution and high intensities were observed in all specimens and these may have influenced the increase in fatigue strength.