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（1 重慶交通科研設(shè)計院； 2 重慶紐勁建筑科技有限公司； 3 重慶市政設(shè)施管理局）
[摘要] 在體外預(yù)應(yīng)力加固技術(shù)中，用高性能的碳纖維板代替?zhèn)鹘y(tǒng)預(yù)應(yīng)力鋼絞線（或預(yù)應(yīng)力鋼材）是可行的、有益的，因此預(yù)應(yīng)力碳纖維板加固技術(shù)是很有應(yīng)用前景的一種加固技術(shù)。為了適應(yīng)橋梁加固對大噸位預(yù)應(yīng)力加固的需要，研制了能一次夾持雙層碳纖維板的波形錨BXM502D，通過錨固組裝件的靜力破斷試驗，驗證了該型號波形錨的錨固能力能達(dá)到600kN以上。將波形錨BXM502D用于大比例T形梁進(jìn)行雙層預(yù)應(yīng)力碳纖維板的加固試驗，雙層碳纖維板的預(yù)拉力達(dá)到300kN；試驗結(jié)果表明雙層預(yù)應(yīng)力碳纖維板能與被加固的混凝土梁共同工作，非常顯著地提高了原結(jié)構(gòu)的開裂、屈服荷載，也大幅提高了原結(jié)構(gòu)的極限承載力。
[關(guān)鍵詞] 預(yù)應(yīng)力碳纖維板；波形錨；鉸式錨；橋梁加固
中圖分類號：TU378 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X（2013）S1-1420-05
作者簡介：卓靜，博士，Email：yakzj@163.com。
Experimental research on reinforced concrete T beams strengthened with prestressed CFRP strip
Zhuo Jing1,2, Yang Hong3
(1 Chongqing communications research and Design Institute, 2 Chongqing new generation building science and Technology Co. , Ltd. , 3 Chongqing municipal facilities administration)
Abstract: In Externally pre-stressed strengthen technology, high performance CFRP plate instead of traditional prestressed steel strand is feasible, useful, so the prestressed CFRP strip strengthen technique is very promising. In order to meet the need of Large Tonnage Prestressed in bridge strengthen, BXM502D which is a type of Wave-Shaped-Gear-Grip(WSGG) anchorage is developed to clamp double CFRP plates. Through the static anchorage assembly breaking test, verified the anchorage capacity of BXM502D can reach above 600kN. The BXM502D were plied in strengthened large proportion of T beam with double prestressed CFRP plates. Double CFRP plates were pre-tensioned reached 300kN.The test results show that double prestressed CFRP plates can significantly improve the original structure of cracking, yielding load, and greatly improve the ultimate bearing capacity of the structure.
Keywords :characteristic-value of bearing capacity; modified coefficient
