A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Incremental Analysis of Structural Construction Costs
The incremental analysis of structural construction costs for bridges was performed by assuming an existing bridge as a prototype and designing eight hypothetical bridges for decreasing design loads. The design load increments and design standards for the hypothetical bridges were developed to reflect the traffic and construction patterns to today. The twelve types of prototype bridges were selected from a set of bridges constructed between 1976-1977 and also represent modern trends in construction. The hypothetical bridges were structurally designed based on the design conditions and also using the materials of the as-built prototype. Based on a standardized unit cost for materials developed from the unit costs of the prototypes, cost was then allocated to each hypothetical bridge design and bridge loading. The result of the analysis was that 65 to 88% of bridge costs were incurred by the lightest design loading. However, when the same loading was analysed at a narrower width it only occurred 53 to 74% of total bridge costs. This study included the effects of increased strength and width requirements of progressively heavier vehicles, also increased width requirements of progressively increased traffic volume. However, this latter effect can only be fully observed if further study is undertaken.
Incremental Analysis of Structural Construction Costs
The incremental analysis of structural construction costs for bridges was performed by assuming an existing bridge as a prototype and designing eight hypothetical bridges for decreasing design loads. The design load increments and design standards for the hypothetical bridges were developed to reflect the traffic and construction patterns to today. The twelve types of prototype bridges were selected from a set of bridges constructed between 1976-1977 and also represent modern trends in construction. The hypothetical bridges were structurally designed based on the design conditions and also using the materials of the as-built prototype. Based on a standardized unit cost for materials developed from the unit costs of the prototypes, cost was then allocated to each hypothetical bridge design and bridge loading. The result of the analysis was that 65 to 88% of bridge costs were incurred by the lightest design loading. However, when the same loading was analysed at a narrower width it only occurred 53 to 74% of total bridge costs. This study included the effects of increased strength and width requirements of progressively heavier vehicles, also increased width requirements of progressively increased traffic volume. However, this latter effect can only be fully observed if further study is undertaken.
Incremental Analysis of Structural Construction Costs
1981
58 pages
Report
No indication
English
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