基于能耗和碳排放的桥梁加固方案评价方法

摘要

基于生命周期评价理论,建立基于能耗—碳排放的桥梁加固方案评价方法.通过目的和范围的确定,清单分析,能耗、碳排放及费用计算,结果分析与评价4个步骤,对桥梁不同加固方案的能耗和碳排放以及费用进行定量分析和计算,通过能耗、碳排放和费用综合比较,评价加固方案.运用该方法对某钢筋混凝土桥梁进行4种加固方案的评价结果表明:不同加固方案的能耗和碳排放与费用不成正比,甚至相反；桥梁加固中采用不同加固材料和施工机械时的能耗和碳排放差异很大;应综合考虑费用与能耗和碳排放的影响进行加固方案的选择.%Based on the Life Cycle Assessment (LCA) theory,an evaluation method was established for bridge strengthening scheme based on energy consumption-carbon emission.By means of four steps,namely,the determination of objectives and scopes,inventory analysis,energy consumption-carbon emission and cost calculation,results analysis and evaluation,quantitative analyses and calculations of energy consumption,carbon emission and cost under different bridge strengthening schemes were conducted.Bridge strengthening schemes were evaluated by comprehensively comparing energy consumption,carbon emission and cost.To verify the applicability of this model,a case study of certain reinforced concrete bridge under four strengthening schemes was carried out.Evaluation results show that for different strengthening schemes,the relationship among energy consumption,carbon emission and cost is not proportional,even is opposite.For different strengthening materials and construction machinery in bridge strengthening,energy consumption and carbon emission vary a lot.Influences of cost,energy consumption and carbon emission should be comprehensively considered in selecting bridge strengthening schemes.