衝撃荷重及び静荷重を受けるシート補強によるコンクリート造円筒殻の破壊形態に基づく振動特性に関する基礎的研究

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The main purpose of this fundamental study is to investigate experimentally vibratory characteristics based on the cracking pattern of concrete cylindrical shells reinforced with carbon fiber sheets under Impact and Static Loads. Vibratory characteristics of concrete shells could serve as versatile means for the damage assessment by suffering from natural disasters such as earthquakes and typhoons. In this study, vibratory characteristics consisting of natural frequencies and damping factors were evaluated by experimental results under the free vibration test both before and after fractural experiments. The fractural experiments conducted on four kinds of concrete shell specimens under high impact, low impact and static loads. The four kinds of specimens were made of standard Reinforced Concrete (RC), Carbon Fiber Sheet Reinforced Concrete (CS), Carbon Fiber Chip Reinforced Concrete (FC) and Composite Carbon Fiber Reinforced Concrete (CC), where the reinforcement in CS and CC was attached by carbon fiber sheets to the outer shell surface, while the reinforcement in FC and CC was mixed with carbon fiber chips into the inner concrete shell body. Carbon fiber chip reinforcement is expected to improve the homogeneity and isotropy of concrete shells compared with those of shells reinforced with standard steel bars, while carbon fiber sheet reinforcement is expected to improve their mechanical behavior in spite of thickness fluctuations. The vibratory characteristics of concrete shells reinforced with carbon fiber sheets under impact and static loads were discussed on the basis of the differences of natural frequencies and damping factors measured by the free vibration test.
一般社団法人日本建築学会の論文
2007-03-20

衝撃荷重及び静荷重を受けるシート補強によるコンクリート造円筒殻の破壊形態に基づく振動特性に関する基礎的研究

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