- 摘 要
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（1 重慶大學土木工程學院， 重慶 400045； 2 重慶大學山地城鎮(zhèn)建設與新技術教育部重點實驗室， 重慶 400045； 3 中廣核工程有限公司， 深圳 518172；4 中國建筑西南設計研究院有限公司， 成都 610041）
［摘要］提出了一種新型實用碳纖維布加固系統(tǒng)，包含首次提出的碳纖維布環(huán)氧樹脂楔形夾持體夾具、張拉設備和碳纖維布薄層鋼板錨具。試驗表明，環(huán)氧樹脂楔形夾持體夾具夾持力強，應力損失低，施工安全，現(xiàn)場安裝方便，且易于在工廠加工制作，適合于實際工程批量應用；張拉設備輕便，易于安裝，不受構件支承條件影響。采用該新型實用碳纖維布加固系統(tǒng)對混凝土薄板進行的驗證性加固試驗表明，張拉設備方便適用，工藝流暢；預應力碳纖維布加固后構件工作性能明顯改善，開裂前的彈性極限荷載達到未加固對比試件及普通粘貼碳纖維布加固試件的4倍；預應力碳纖維布加固試件的極限承載力比未加固試件提高103%，比普通粘貼碳纖維布加固試件提高32%，承載力明顯提高。碳纖維布直至斷裂也未從薄層鋼板錨具中滑出，驗證了其良好的錨固性能。
［關鍵詞］預應力碳纖維布； 夾具； 錨具； 環(huán)氧樹脂楔形夾持體夾具； 加固工藝； 張拉設備
中圖分類號：TU375-2文獻標識碼：A文章編號：1002-848X(2019)02-0049-06
Study on practical method of flexural bearing capacity of concrete slabs strengthened with prestressed CFRP sheets
Quan Xueyou1,2, Wu Dekuan1, Tong Congqing3, Li Shaofei4
(1 School of Civil Engineering, Chongqing University, Chongqing 400045, China; 2 Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Chongqing 400045, China; 3 China Nuclear Power Engineering Co., Ltd., Shenzhen 518172, China; 4 China Southwest Architectural Design and Research Institute Co., [JZ]Ltd., Chengdu 610041, China)
Abstract:A new practical strengthening system of prestressed CFRP sheets was proposed, which consisted of the firstly presented epoxy resin wedge clamps for CFRP sheets, tension equipment and double-thin-layer steel plate anchorages. Test results show that the epoxy resin wedge clamp has advantages including strong clamping force, low stress loss, safe construction, convenient on-site installation, and easy processing in the factory. It is suitable for practical engineering batch application. The tension equipment is light and easy to install, and is not affected by component support conditions. The verification strengthening test of the concrete thin plate by the new practical strengthening system of prestressed CFRP sheets shows that the tension equipment is convenient and applicable, and the process is smooth; the elastic ultimate load of the test specimen strengthened with prestressed CFRP sheet before cracking reaches 4 times of the non-strengthened test specimen and the ordinary CFRP paste-strengthened test specimen; the ultimate bearing capacity of the test specimen strengthened with prestressed CFRP sheet is 103% higher than that of the non-strengthened test specimens, 32% higher than that of the ordinary CFRP paste-strengthened test specimens, and the bearing capacity is significantly improved. The CFRP sheets did not slip out of the double-thin-layer steel plate anchorages until it broke, which proved its good anchoring performance.
Keywords:prestressed CFRP sheet; clamp; anchorage; epoxy resin wedge clamp; strengthening process; tension equipment
作者簡介：全學友，博士，教授，博士生導師，Email:quanxueyou@163.com。
