A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of Increased Truck Weights upon Illinois Highway Bridges
Fifteen (15) bridges located on the designated truck route system in Illinois were selected for damage evaluation purposes. These bridges represent 1,059 older bridges with a limited load-carrying capacity (54,000 lbs.). Actual live load stress range data were acquired at the critical structural details for all fifteen bridges. The evaluation of fatigue damage and estimation of fatigue life were based on current fatigue analysis methods recommended in recent bridge evaluation studies. The estimated shortened life of bridges was used to determine the cost associated with early replacement of the affected bridges. The annual cost to the State, for these 1,059 deficient bridges, was determined to range from $16.4 to 30.0 million. The study revealed that the increase in the live load stress range alone is only partially responsible for the increased fatigue damage to the bridges. However, the traffic growth is more severely affecting these bridges. The study revealed that the average shortened fatigue life of affected bridges was 33 percent. The study indicates that without the load and traffic increase, 80 percent of bridges had a life longer than 75 years. With the weight increase and the 5.6 percent traffic growth, only 40 percent of bridges have a life longer than 75 years.
Effect of Increased Truck Weights upon Illinois Highway Bridges
Fifteen (15) bridges located on the designated truck route system in Illinois were selected for damage evaluation purposes. These bridges represent 1,059 older bridges with a limited load-carrying capacity (54,000 lbs.). Actual live load stress range data were acquired at the critical structural details for all fifteen bridges. The evaluation of fatigue damage and estimation of fatigue life were based on current fatigue analysis methods recommended in recent bridge evaluation studies. The estimated shortened life of bridges was used to determine the cost associated with early replacement of the affected bridges. The annual cost to the State, for these 1,059 deficient bridges, was determined to range from $16.4 to 30.0 million. The study revealed that the increase in the live load stress range alone is only partially responsible for the increased fatigue damage to the bridges. However, the traffic growth is more severely affecting these bridges. The study revealed that the average shortened fatigue life of affected bridges was 33 percent. The study indicates that without the load and traffic increase, 80 percent of bridges had a life longer than 75 years. With the weight increase and the 5.6 percent traffic growth, only 40 percent of bridges have a life longer than 75 years.
Effect of Increased Truck Weights upon Illinois Highway Bridges
J. Mohammadi (author) / S. A. Guralnick (author) / R. Polepeddi (author)
1991
130 pages
Report
No indication
English
Highway Engineering , Transportation & Traffic Planning , Transportation , Road Transportation , Highway bridges , Vehicle weight limits , Load bearing capacity , Life expectancy , Fatigue life , Cost analysis , Service life , Traffic flow , Loads(Forces) , Stress analysis , Damage assessment , Illinois , Trucks
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