期刊
JOURNAL OF INFRASTRUCTURE SYSTEMS
卷 14, 期 3, 页码 214-222出版社
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)1076-0342(2008)14:3(214)
关键词
Life cycles; Environmental issues; Bridge design; Fiber reinforced materials; Concrete pavements; Traffic delay; Construction costs
资金
- NSF MUSES Biocomplexity Program [CMS-0223971, CMS-0329416]
An integrated life-cycle assessment and life-cycle cost analysis model was developed and applied to enhance the sustainability of concrete bridge infrastructure. The objective of this model is to compare alternative bridge deck designs from a sustainability perspective that accounts for total life-cycle costs including agency, user, and environmental costs. A conventional concrete bridge deck and an alternative engineered cementitious composite link slab design are examined. Despite higher initial costs and greater material-related environmental impacts on a per mass basis, the link slab design results in lower life-cycle costs and reduced environmental impacts when evaluated over the entire life cycle. Traffic delay caused by construction comprises 91% of total costs for both designs. Costs to the funding agency comprise less than 3% of total costs, and environmental costs are less than 0.5%. These results show life-cycle modeling is an important decision-making tool since initial costs and agency costs are not illustrative of total life-cycle costs. Additionally, accounting for construction-related traffic delay is vital to assessing the total economic cost and environmental impact of infrastructure design decisions.
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