Development of Blast-Resistant Strengthening Technology for Reinforced Concrete Slabs Using Thin Panels of High Volume Fiber Concrete

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04793
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 23010:Building structures and materials-related
• Research Institution: Kumamoto University
• Principal Investigator: Yamaguchi Makoto 熊本大学, 大学院先端科学研究部(工), 准教授 (80570746)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 鉄筋コンクリート / 耐爆補強 / スラリー充填繊維コンクリート / 接触爆発 / 局部破壊

Outline of Final Research Achievements

In this study, to contribute to the development of blast-resistant strengthening technology for existing reinforced concrete (RC) slabs using slurry infiltrated fiber concrete (SIFCON), experimental investigations were conducted on the blast resistance against contact detonation of RC slabs of which backsides were adhesively strengthened with SIFCON thin panels. As a result, it was shown that the RC slab thickness required for thickening reinforcement could be reduced by more than 90% by applying SIFCON panels. However, when a relatively thick panel is used, spalling that is obvious from the outside is suppressed, but panel peeling becomes conspicuous due to an increase in the rigidity of the panel. Therefore, it is necessary to examine the joining method of the panel to the backsides of the RC slabs.

Free Research Field

建築構造・材料

Academic Significance and Societal Importance of the Research Achievements

本研究成果によれば、ごく薄肉のSIFCONパネルをRC版裏面に貼付することにより、当該RC版の接触爆発に対する耐爆性能を飛躍的に向上させることができる。したがって、本研究成果を適用することにより既に建設済のRC構造物に対する効果的な耐爆補強を実施することができ、より安全・安心な社会の実現に貢献し得ると考えられる点で、本研究成果は学術的・社会的意義を有するものであると考えられる。