Damage Evaluation Method of Laminated Ruber Bearing by using AE Technique

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K18143
• 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: Ritsumeikan University
• Principal Investigator: Kawasaki Yuma 立命館大学, 理工学部, 准教授 (90633222)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 積層ゴム支承 / アコースティック・エミッション / 3次元位置標定

Outline of Final Research Achievements

Recently, the problems concerning deterioration in the laminated rubber bearings has become obvious. To protect laminated rubber bearings from fracture during earthquakes, establishing adequate damage assessment technique is an urgent issue. In this research, the AE method which is one of the non-destructive testing was used for damage assessment of the laminated rubber bearings.
This study observed AE activities by laboratory tests. The AE activities and their parameters of the damaged bearings were compared with those of new bearings. The results of the cyclic compression loading tests showed that the internal damage of the rubber bearings could be estimated through the activities of the AE parameters. Many AE hits and large AE energy were observed from the damaged rubber bearings through the cyclic compression loading tests, however, few AE activities were observed from new bearings. AE measurement technique was effective to assess the damage of the laminated rubber bearing.

Free Research Field

Non-Destructive Testing