Development of technology for improving ultimate performance of seismic isolation systems for excessive earthquake ground motion

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H02274
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Hokkaido University
• Principal Investigator: Kikuchi Masaru 北海道大学, 工学研究院, 教授 (50344479)
• Co-Investigator(Kenkyū-buntansha): 濱口 弘樹 株式会社竹中工務店 技術研究所, 地震工学部, グループ長 (10416589) ; 白井 和貴 北海道大学, 工学研究院, 准教授 (20610968) ; 飯場 正紀 北海道大学, 工学研究院, 教授 (40344006) ; 山本 雅史 株式会社竹中工務店 技術研究所, 地震工学部, 部長 (90416587)
• Research Collaborator: ISHII Ken ; WAKE Tomotaka ; KAMOSHITA Naoto ; AIKEN Ian D. ; BLACK Cameron J. ; MCKENNA Frank
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 耐震設計 / 免震構造 / 積層ゴム / すべり支承 / フェイルセーフ / 長周期地震動 / 巨大地震

Outline of Final Research Achievements

This research aims to develop technology that improves the ultimate performance of seismic isolation systems for excessive earthquake ground motions. Two high-performance seismic isolation devices were developed. One is a high durability elastomeric seismic isolation bearing whose performance does not easily deteriorate during a large number of cyclic deformations caused by long period ground motions. The other is a fail-safe system that maintains the device’s seismic isolation performance without being damaged, even during excessive large deformations. Furthermore, we proposed analytical models that predict the ultimate behavior of the isolation systems we developed. The models were implemented in the open-source structure analysis program, OpenSees, which enables us to design seismically isolated structures that incorporate the high-performance devices we developed.

Free Research Field

工学