混凝土桥和钢桥全寿命周期生态环境评价

Ecological life cycle assessment of concrete bridge and steel bridge

介绍了一套适用于桥梁的全寿命周期生态环境评价方法,以资源消耗、能源消耗和碳排放为指标。这套评价方法分别被应用于条件相似的混凝土桥和钢桥中,通过简支梁桥和多跨连续梁桥计算比较,发现在资源消耗上,钢桥优于混凝土桥,在能源消耗和碳排放方面,混凝土桥优于钢桥,但是随着跨径增大,这种优势趋于减小,甚至出现反超。

This paper introduced an ecological life cycle assessment method suited for bridge, which had three indicators, namely, resource con- sumption, energy consumption and carbon emission. This method was applied to bridges with similar conditions but of different materials. Through calculation and comparative analysis of a simply supported beam bridge and a multi-span continuous beam bridge, it was found that steel bridges were better than concrete bridges in respect of resource consumption, while concrete bridges behave better than steel bridges in the aspect of energy consumption and carbon emission. However, as the span increases, the superiority tends to decrease, and may even be overturn.