遺伝的アルゴリズムによる建築構造物のライフサイクルデザインに関する研究: 地震ハザードを考慮したライフサイクルデザイン

摘要

近年の地球環境問題の深刻化に伴い，建築分野においても持続可rn能な発展に貢献すべきであるという認識が高まっている。日本建築rn学会は建築構造物の耐用年数を延長させることが建築分野におけるrn二酸化炭素排出量の削減に効果的であるとし，わが国における建築rn構造物の寿命を3倍ないし100年に延長することを提唱していrnる。%Recently, the environmental impact has been required to be explicitly taken into account in a life cycle design of building structures besides the initial economical efficiency, which has been ordinarily required up to the present days. Consequently, it is important not only to design the building structures so as to be safe as well as economical at the initial stage of completion of the building but also to pay attention and take into account the total behaviors of the designed and constructed building structures during all stages of their life cycles. The former paper of the authors has proposed the way to deal with the life cycle design of building structures with consideration of a hierarchy according to the ranks of building construction systems by using genetic algorithms as the optimization scheme with respect to both ecology and economy for evaluations. However, there are various uncertenties in a life cycle of building structures, therefore it is necessary to expand it to the life cycle evaluation that considered those uncertenties. In particular, the effect caused by earthquakes which occurs during the evaluation period should be investigated. Present paper proposes the way to realize the life cycle evaluation of building structures with consideration of seismic hazard, and investigate its effectiveness of Life Cycle Design considering seismic hazard through numerical examples.