Numerical experiment system for seismic design with considering parameter variation of seismic characteristics

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420576
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Tokyo Denki University
• Principal Investigator: Makoto Yamakawa 東京電機大学, 未来科学部, 准教授 (50378816)
• Co-Investigator(Kenkyū-buntansha): OHSAKI Makoto 京都大学, 工学研究科, 教授 (40176855)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 耐震設計 / 地震動 / 不確定性 / 構造最適化 / 動的解析 / ロバスト性 / ランダムサンプリング / 順序統計

Outline of Final Research Achievements

In the practical design process, uncertainty in the parameters should be appropriately taken into account. Earthquakes should be considered as uncertain phenomena. Robust design method is known as an effective design method under such uncertainties, where a design is found to be insensitive to environment and other uncontrollable factors. Worst-case design of structures is a popular approach as a robust design method, where the objective function and/or the constraints are assigned to the worst values of the structural responses. However, predicting the exact extremes from small samples is difficult in general. Hence, we have proposed use of the approximately worst value instead of the exact worst value. We can predict and control more accurately the behavior by the order statistics with RS. We could successfully apply the approach to seismic design problems linking with a prescribed accuracy. The result indicates a new aspect of the proposed robust design method.

Free Research Field

建築構造