Abstract
The interest of the environmental problem has been increased world widely, and it is required to reduce the environmental impact. It is also recommended that civil engineers should pay attention to not only lifecycle cost (LCC) but also lifecycle environmental impact (LCCO2) of civil infrastructures. In this study, the LCCO2 of newly developed bridges, named the minimized girder, the rationalized box-girder and the rationalized truss bridge in Japan were calculated. The LCCO2 of the conventional bridges, I-girder, box-girder and truss bridges were also calculated and compared with that of the newly developed bridges. It was found from the estimation that the newly developed types of the bridges have less total LCCO2 than the corresponding conventional bridges. These reductions of whole LCCO2 of the bridge are resulted from the maintenance stage of the bridge.
