Earthquake safety of scissors-type of emergency bridge for rapid construction on disaster area

2017 Fiscal Year Final Research Report

• Project/Area Number: 16H06840
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Shinshu University
• Principal Investigator: CHIKAHIRO Yuki 信州大学, 工学部, 助教(特定雇用) (10778905)
• Project Period (FY): 2016-08-26 – 2018-03-31
• Keywords: 緊急橋 / シザーズ橋 / 動的挙動 / 耐震性能

Outline of Final Research Achievements

The purpose of this research is to evaluate the dynamic characteristics and the earthquake safety at the disaster site of the scissors-type emergency bridge aiming for rapid construction within 72 hours. In the eigenvalue analysis, the vibration mode of the scissors bridge showed a tendency similar to that of a beam structure, although the expansion direction was remarkable. Under the earthquake, high bending stress occurred near the supporting point of the pivot. Within the parametric analysis, the maximum bending stress was approximately three times as large as the static analysis. In other words, when considering the safety factor of the main member, it is required over three times under the earthquake.

Free Research Field

構造工学・橋梁工学