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 Experimental study on reinforcement by lightweight resin mortar and CFRP molding material from under the steel deck slab
Tác giả hoặc Nhóm tác giả: Tsubasa YASUDA, Kazuo OHGAKI, Yuya HIDEKUMA, Manabu ISHIDA, Noriyuki SUZUKI, Ngoc Vinh PHAM
Nơi đăng: Japanese Journal of JSCE; Số: 80(14);Từ->đến trang: 23-14002;Năm: 2024
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
During fatigue damage to the steel deck, fatigue cracks propagate starting from the U-rib welds. As a countermeasure against such fatigue damage, SFRC pavement construction is a standard construction method. However, lane regulation is required and causes traffic congestion. Therefore, we are considering a reinforcement method using lightweight resin mortar filled in the U-ribs and CFRP molded material pasted between the U-ribs as a reinforcement method from the bottom of the steel deck slab. In this study, we performed a steel deck specimen with three U-ribs, filled the U-ribs with lightweight resin mortar, secondary injection of resin, and pasted CFRP molding material between the U-ribs. We confirmed the reinforcing effect. We also applied heat equivalent to that of goose asphalt pavement and confirmed changes in performance when affected by heat.
ABSTRACT
During fatigue damage to the steel deck, fatigue cracks propagate starting from the U-rib welds. As a countermeasure against such fatigue damage, SFRC pavement construction is a standard construction method. However, lane regulation is required and causes traffic congestion. Therefore, we are considering a reinforcement method using lightweight resin mortar filled in the U-ribs and CFRP molded material pasted between the U-ribs as a reinforcement method from the bottom of the steel deck slab. In this study, we performed a steel deck specimen with three U-ribs, filled the U-ribs with lightweight resin mortar, secondary injection of resin, and pasted CFRP molding material between the U-ribs. We confirmed the reinforcing effect. We also applied heat equivalent to that of goose asphalt pavement and confirmed changes in performance when affected by heat.
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