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Fatigue-Prone Details in Steel Bridges

Reza Haghani (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Mohammad Al-Emrani (Institutionen för bygg- och miljöteknik, Konstruktionsteknik) ; Mohsen Heshmati (Institutionen för bygg- och miljöteknik, Konstruktionsteknik)
Buildings (2075-5309). Vol. 2 (2012), 4, p. 456-476.
[Artikel, refereegranskad vetenskaplig]

This paper reviews the results of a comprehensive investigation including more than 100 fatigue damage cases, reported for steel and composite bridges. The damage cases are categorized according to types of detail. The mechanisms behind fatigue damage in each category are identified and studied. It was found that more than 90% of all reported damage cases are of deformation-induced type and generated by some kind of unintentional or otherwise overlooked interaction between different load-carrying members or systems in the bridge. Poor detailing, with unstiffened gaps and abrupt changes in stiffness at the connections between different members were also found to contribute to fatigue cracking in many details.

Nyckelord: fatigue, failure, steel bridges, girder, deformation induced cracking



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Denna post skapades 2012-12-07. Senast ändrad 2015-03-30.
CPL Pubid: 167273

 

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