A method to synthesize reliable input motions for seismic design considering the effect of various uncertainty factors using the concept of information theory

2015 Fiscal Year Final Research Report

• Project/Area Number: 24360177
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: The University of Tokyo
• Principal Investigator: HONDA Riki 東京大学, 新領域創成科学研究科, 教授 (60301248)
• Co-Investigator(Kenkyū-buntansha): MIYAMOTO Takashi 山梨大学, 総合研究部, 助教 (30637989)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 設計用入力地震動 / 耐震設計 / 情報エントロピー / 不確実性 / 非線形挙動

Outline of Final Research Achievements

This research proposes a concept that, for the seismic design, not a few strong ground motions, but a whole set of input ground motions should be considered. To implement this concept, we developed a scheme to determine the set of ground motions in which their value in terms of their effect on the seismic performance of the structures are evaluated by information entropy. Also proposed a practical method to synthesize the ground motions that represent the set of ground motions, in which a candidate of input motion “learns” other waves to grow a representative wave to be considered in the seismic design. The develop method uses Jensen-Shannon divergence for stable computation of information quantity and utilizes clustering method to deal with a wide range of ground motions efficiently.

Free Research Field

地震工学・維持管理工学