A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
States are facing strong pressure to allow heavier truck weights. Such increases in weight place a heavy burden on the bridge system which already suffers many structural deficiencies. Ohio is considering increases in weight through a permit system which would allow the collection of funds to maintain the safety and service life of the existing bridge system. The study has examined the statistics of both the Ohio State and non-state owned bridges under a very large variety of possible changes in truck weight regulations. Bridge cost models have been derived to cover new bridge construction, rehabilitation of capacities of existing bridges and reduced service life due to fatigue. Current legal ratings have been analyzed and expected changes due to weight law scenarios have been computed using simple span and continuous span bridge behavior analyses for bending moments. For each weight scenario, the overall required AASHTO HS design level required was assessed along with added construction cost. Further, the number of bridges that will need to be strengthened along with these costs was determined. Finally, a fatigue cost was estimated to be assessed for each crossing of a bridge by either a truck using a new weight regulation or falling into the superload class. Total bridge costs are computed for several hundreds of permit weight types and combined for both State and non-state bridges.
States are facing strong pressure to allow heavier truck weights. Such increases in weight place a heavy burden on the bridge system which already suffers many structural deficiencies. Ohio is considering increases in weight through a permit system which would allow the collection of funds to maintain the safety and service life of the existing bridge system. The study has examined the statistics of both the Ohio State and non-state owned bridges under a very large variety of possible changes in truck weight regulations. Bridge cost models have been derived to cover new bridge construction, rehabilitation of capacities of existing bridges and reduced service life due to fatigue. Current legal ratings have been analyzed and expected changes due to weight law scenarios have been computed using simple span and continuous span bridge behavior analyses for bending moments. For each weight scenario, the overall required AASHTO HS design level required was assessed along with added construction cost. Further, the number of bridges that will need to be strengthened along with these costs was determined. Finally, a fatigue cost was estimated to be assessed for each crossing of a bridge by either a truck using a new weight regulation or falling into the superload class. Total bridge costs are computed for several hundreds of permit weight types and combined for both State and non-state bridges.
Truck Weight Effects on Bridge Costs
F. Moses (author)
1992
165 pages
Report
No indication
English
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