Failure modes for gusset plate
connections are local buckling of gusset plate
and purlins, and elongation of boltholes.
Therefore, fatigue performances of other commonly seen types, such as gusset plate
and notching based joints, need to be investigated in order to obtain appropriate ratios of the static moment resistance of the joints to their fatigue moment capacities.
Among the topics are the cable-stayed bridge across the River Sava in Belgrade, incorporating climate change predictions in the hydraulic analysis of bridges, new tools for inspecting gusset plates
, deck truss bearing rehabilitation for the Benjamin Franklin Bridge, the rapid replacement of bridges using modular systems, identifying and sharing best practices in bridge maintenance and management, and examining the forms of Hudson River bridges.
NTSB claims that the bridge's collapse was the result of the under-design of certain gusset plates
(metal plates used to connect structural members of a truss and hold them in position at a joint) at six nodes of the deck truss.
Work involves repairing 26 corroded areas, including reinforcing gusset plates
and areas of the lower chord (steel members located beneath the deck), spot-painting areas to slow corrosion and removing concrete areas on the deck s lower surface in poor condition.
Although hand stenciling is the most practical way to mark one-of-a-kind primary bridge members, the use of hand stenciling on high-quantity primary and non-stress secondary bridge members, including gusset plates
, lacing bars and diaphragms, can be burdensome.
5-day course, designed to refresh the skills of practicing bridge inspectors, is based on the Bridge Inspector's Reference Manual (FHWA-NHI-03-001) and offers additional topics, such as fiber reinforced plastic, inspection of truss gusset plates
, structure inventory and appraisal overview, and common National Bridge Inventory miscodings.
The discovery raised safety concerns for other bridges around the country, prompting the Federal Highway Administration to urge all states to pay extra attention to how much weight they allow to be placed on bridge designs using so-called gusset plates
, which are not limited to truss bridges.
In addition to their full line of tubing, they manufacture other structural components, including runner bars, perforated angle iron, gusset plates
, and dunnage bars.
In an effort to ensure bridge safety, USDOT officials recently issued a technical advisory calling on State transportation officials to calculate how changes in weight, capacity, or bridge conditions could affect a steel bridge's gusset plates
55 pcs damaged / bent connections, gusset plates
, tie plates, tensioning straps replace / complement to steel truss girders of a shed roof / judge;- Approximately 1 860 running meters.
Furtherm ore, application of glue in the gusset plates
could at least double the moment resisting strength of such joints.