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Application of Adhesives in Steel Bridges
potential use of adhesives in new construction in both in the shop and in the
field is to be investigated. The possible benefits include reduced number of
mechanical fasteners and prevention of crevice corrosion at the edges of the
connection. Adhesives are widely used in other industries including aerospace,
wind turbine blades, and light metal products.
Evaluation of the use of structural adhesives in structural steel
connections. The research should evaluate the shear strength of the adhesives,
their creep behavior at expected steel temperatures in the bridge, curing of
adhesives after joint assembly, and surface finish of the steel required to
develop the shear performance. In addition, the long term performance of the
adhesives under freeze-thaw conditions and exposure to deicing chemicals needs
to be evaluated.
initial project will provide the basis for the introduction of structural
adhesives in bridge structures.
Structural adhesives have been implemented in other industries due to
their high strength and durability. A hybrid joint using bolts and adhesives
will provide increased slip resistance, prevention of crevice corrosion at the
edges of the connected material, and elimination of bolts added to the
connection to satisfy maximum bolt spacing for corrosion protection.
research in this area is predominantly related to lighter construction and
structural composites. The proposed research will utilize the knowledge gained
in other industries and evaluate the adhesives in our construction and exposure
Survey and Selection of Candidate Adhesives for Evaluation
term shear tests to determine shear strength of adhesives with and without a
and exposure testing to determine the long term performance of the connection.
Design guides for prototype
results of the study will provide the knowledge to begin the use of adhesives
in steel bridge connections. It is expected that the initial use will be in
shop connection of bracing and cross frame members. Further studies to develop
design guides to predict the strength of large size bridge hybrid bolt-adhesive
connections will be required.
This work would be relevant to the entire bridge design community.
|Sponsoring Committee:||AFF20, Steel Bridges
|Research Period:||12 - 24 months|
|RNS Developer:||Karl Frank, Consultant to NSBA|
|Source Info:||The aerospace, wind turbine, and automotive industries are active users of adhesives. The research performed and the products developed for these industries are a valuable source of information.|
|Index Terms:||Adhesives, Steel bridges, Structural connection, Shear strength, Creep, Finishes, Freeze thaw durability, Deicing chemicals, |
Bridges and other structures
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