Evaluation of Bridge Environmental Impact Midpoint Model Based on Determination
In order to study the environmental impact of bridge structure life cycle,based on the life cycle assessment(LCA)method,nine types of environmental impact factors,such as global warming potential(GWP),primary energy depletion(PED),abiotic depletion potential(ADP),water utilization(WU),acidification potential(AP),eutrophication potential(EP),inhalable inorganics(RI),ozone depletion potential(ODP),and photochemical ozone creation potential(POCP)are selected.Based on the determination,the calculation method and model of bridge life cycle environmental impact midpoint model are established.And a typical case bridge is selected for the case analysis to study the environmental impact based on the midpoint model in the life cycle of the bridge.The result shows that the environmental impact of bridges with different building materials is quite different,in which three kinds of building materials such as concrete,steel and asphalt have the maximum impact on the environment.The impact on the environment varies at different stages of the life cycle of the bridge,in which the production of building materials and the site construction process of bridge are the maximum impact on the environment,and the environmental impact in the other stages is relatively little.
bridgelife cycle assessmentenvironmental impactmidpoint model
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