Steel
truss bridges are frequently used in bridge engineering because of their good ability of spanning capacity, construction and
light self-weight. Main trusses are the critical component of steel
truss bridge and the main truss are made of truss members linked by integral
joints. This paper presents the mechanic performance of key joints, and the
codified design of joints in steel truss
girders according to the latest European norms. The results showed that the
fatigue resistance of welded joints evaluation is necessary to predict, detect,
and repair the crack in time for the safety service life of the bridge. The stresses of integral joint are greater than
that of truss members; the stresses in the center area of the integral
joint are greater than the stress at the edge.
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