- 摘 要
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（1 東莞理工學(xué)院建筑工程系， 東莞 523808； 2 華南理工大學(xué)土木與交通學(xué)院， 廣州 510640）
［摘要］采用CFRP，BFRP，GFRP 3種筋材對鋼筋混凝土梁進行表層嵌入式（Near surface Mounted-NSM）加固。通過對比不同筋材加固后構(gòu)件的荷載位移曲線、開裂模式、破壞模式來分析對比3種筋材的加固效果。試驗結(jié)果表明，使用嵌入式方法加固可以有效地提高構(gòu)件的抗彎承載力，構(gòu)件的剛度和抗裂的基本性能也明顯改善。其中嵌入CFRP筋材構(gòu)件的承載力最高，其次是嵌入GFRP筋材，BFRP筋材構(gòu)件。表層嵌貼FRP筋材加固鋼筋混凝土梁具有良好的受力性能和較好的應(yīng)用前景。
［關(guān)鍵詞］FRP筋材； 嵌入式加固； 受彎構(gòu)件加固； 承載力
中圖分類號：TU375.1文獻標(biāo)識碼：A文章編號：1002-848X(2017)21-0090-06
Study of mechanical behavior of reinforced concrete beams strengthened with NSM FRP bars
Xia Lipeng1,2, Zheng Yu1, Jiang Liangsheng1, Luo Shijie1, Yang Jianbin1
(1 Department of Civil Engineering, Dongguan University of Technology, Dongguan 523808, China; 2 School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, China)
Abstract:Three types of Fiber Reinforced Polymer (FRP) bars, including CFRP, BFRP and GFRP, were used to conduct Near Surface Mounted (NSM) strengthening on reinforced concrete beams. By comparing the load displacement curves, cracking patterns and failures modes of the specimens with different reinforcement materials, the effect of NSM FRP bars was studied. The test results show that NSM strengthening method can effectively enhance the flexural bearing capacity of the beams. In addition, the stiffness and crack resistance of the structural component was also improved by NSM strengthening method significantly. The CFRP bars strengthened beam has the highest loading-carrying capacity compared to those strengthened by BFRP and GFRP bars. The results show that the concrete beams strengthened by NSM method have good mechanical properties and good application prospect.
Keywords:FRP bar; NSM strengthening method; strengthening of bending member; bearing capacity
*廣東省高等學(xué)校優(yōu)秀青年教師培養(yǎng)計劃（Yq2013155），廣東省交通廳科技計劃（科技-2013-02-029），2014年廣東省大學(xué)創(chuàng)新創(chuàng)業(yè)訓(xùn)練計劃項目（011001012）。
通訊作者：鄭愚，博士，教授，Email:.zhengy@dgut.edu.cn。
