A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fatigue Strength of Deteriorated and Previously Stressed Steel Highway Bridges
This study provides a comparison of four procedures to determine the fatigue life of steel bridges, namely the AASHTO Guide Specifications, BAR7, the Lehigh method, and fracture mechanics (LEFM). Several details are examined using AASHTO guidelines and linear fracture mechanics principles where the time required for an initial flaw to propagate to a critical depth is calculated. It is found that fatigue lives of actual bridges as determined using fracture mechanics far exceed the remaining safe fatigue life predictions made with current AASHTO guide specifications. For the case of redundant bridges, an adjustment factor is introduced which, at various probability levels, can produce closer estimates of bridge fatigue lives between the AASHTO specifications and fracture mechanics.
Fatigue Strength of Deteriorated and Previously Stressed Steel Highway Bridges
This study provides a comparison of four procedures to determine the fatigue life of steel bridges, namely the AASHTO Guide Specifications, BAR7, the Lehigh method, and fracture mechanics (LEFM). Several details are examined using AASHTO guidelines and linear fracture mechanics principles where the time required for an initial flaw to propagate to a critical depth is calculated. It is found that fatigue lives of actual bridges as determined using fracture mechanics far exceed the remaining safe fatigue life predictions made with current AASHTO guide specifications. For the case of redundant bridges, an adjustment factor is introduced which, at various probability levels, can produce closer estimates of bridge fatigue lives between the AASHTO specifications and fracture mechanics.
Fatigue Strength of Deteriorated and Previously Stressed Steel Highway Bridges
G. Tsiatas (author) / E. McEwen (author) / A. Shukla (author) / S. Palmquist (author)
2002
138 pages
Report
No indication
English
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