Dynamic Analysis of OCS-poles on Shinkansen Viaduct and their monitoring

2015 Fiscal Year Final Research Report

• Project/Area Number: 26820182
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: The University of Tokyo
• Principal Investigator: MIZUTANI Tsukasa 東京大学, 工学(系)研究科(研究院), 助教 (10636632)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Keywords: 電車線柱 / 新幹線高架橋 / 地震 / 損傷 / 動的非線形解析 / モニタリング

Outline of Final Research Achievements

In the Great East Japan Earthquake, Shinkansen operation system had stopped for long time, be-cause a large number of OCS poles of pre-stressed concrete on Shinkansen viaducts had fell down even though the viaducts were not severely damaged. Thus, the seismic performance of the OCS-poles should be clarified and improved shortly by realistic techniques. In this study, firstly building a three-dimensional coupled frame model of four-block Shinkansen viaducts including OCS-poles and catenary cables, seismic response analysis was conducted and the dynamic response properties of the viaducuts and OCS-poles have clarified. Secondly, based on those results, a vibration control technique using TMD to ease damage of OCS-poles was proposed. Finally, conducting some simulations and referring to various material on TMD, the advantage of the proposed technique to the conventional ones improving seismic performance of OCS-poles in terms of function, cost, workability and maintenance was shown.

Free Research Field

ディジタル信号処理，振動工学，電磁波計測，モニタリング