Investigation by an impact response analysis into problems in the design procedure for a pocket-type rockfall protection net

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420456
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Kanazawa University
• Principal Investigator: MAEGAWA KOJI 金沢大学, 環境デザイン学系, 教授 (00124024)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: ポケット式落石防護網 / 衝撃応答解析 / 吸収エネルギー / エネルギーロス / 道路土工指針 / 落石対策便覧

Outline of Final Research Achievements

A design method of a pocket type rockfall-protection net is based on design guidelines such as Rockfall Mitigation Handbook, and the cumulative absorption-energy system of each structural element and the view of energy loss are useful design techniques for simplification in the design works. However, the evaluation of the energy loss has been regarded as questionable, since the parameters for calculating the energy loss are not defined clearly in the design guidelines.
Through impact response analyses of the energy absorption process in a pocket type rockfall-protection net, this research has found that there is no doubt of the safety in the pocket type rockfall-protection nets designed by the cumulative absorption-energy system and the view of an energy loss.

Free Research Field

工学