| Research Abstract |
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 LCCO_2 corresponding to each of these levels and discusses corresponding means of reducing LCCO_2 To illustrate, calculations were made with respect to an building. If the subsystem level having a building life of 1000years should be feasible, it would be possible to reduce LCCO_2 about 50%, compared to the case rebuilding every 100years. In the case of rebuilding every 100years, if reuse at the member level should be feasible, about 30% reduction of LCCO_2 would be possible. Any recycling at the material level would permit a cut of about 20% in LCCO_2 Long service life, reuse and recycling and three primary measures for reducing environmental burden in building field. A sustainable building structure enables the environmental burden to reduce. This structural system, which is a kind of damage-controlled structure, consists of semi-rigid beam-column connection with buckling restrained braces like knee brace. In this study, full-scale experiments of column-beam joining method were carried out. Based on these results, structural models, which modeled the connection, were analyzed, and the systematization of this structure verified.
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