Development of the Highest Accuracy Force Measurement System for Large Biaxial and Triaxial Dynamic Tests

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18843
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 23:Architecture, building engineering, and related fields
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Kishiki Shoichi 東京工業大学, 科学技術創成研究院, 教授 (00447525)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: 建築構造 / 実験装置 / 計測方法 / 精度 / 多軸加力

Outline of Final Research Achievements

The purpose of this research project is to verify the performance of the components of the experimental apparatus (full-scale testing facility “E-Isolation”), which employs a new measurement method with laminated rubber bearings and four horizontal links, in parallel with the construction of the facility, and to conduct verification experiments for maximum vertical and horizontal loading performance after the apparatus is put into operation. Through these experiments, the characteristics of the natural rubber laminate bearing that constitutes the facility in the extremely small-deformation region, the vertical characteristics when pre-stress is introduced, and the horizontal characteristics of the reaction beam supports were determined. Furthermore, the laminated rubber bearing was inserted as the test specimen, and dynamic experiments were conducted on the maximum vertical load and horizontal performance of the testing machine to confirm the validity of the measurement system.

Free Research Field

建築構造・材料

Academic Significance and Societal Importance of the Research Achievements

我が国には大型化する免震部材に対して、その破壊実験や性能検証を縮小試験体の静的実験結果などを基に外挿して評価している問題があった。しかしながら、実大免震試験機“E-Isolation”が完成し、それらの実験が可能となった。本研究課題では、実大免震試験機のキーとなる天然ゴム系積層ゴム支承の微小変形時の挙動を把握するとともに、建設時における各部の性能確認を行ったものである。完成後には最大鉛直・水平性能の実験を行い、新たな計測システムの妥当性を検証しており、今後の実大免震試験機の活用に際して重要なデータを得ることに成功している。