抄録
Architectural steel structures can be considered as a hierarchy, composed of the building, the system, the subsystem, the member and the material level. This paper studies LCC0_2 corresponding to each of these levels and discusses corresponding means of reducing LCC0_2. To illustrate, calculations were made with respect to an apartment building. If the subsystem level having a building life of 1,000 years should be feasible, it would be possible to reduce LCC0_2 by about 50%, compared to the case of rebuilding every 100 years. In the case of rebuilding every 100 years, if reuse at the member level should be feasible, about 30% reduction of LCC0_2 would be possible. Any recycling at the material level would permit a cut of about 20% in LCC0_2.
