碱环境下玻璃纤维布加固钢筋混凝土梁的受力性能
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广西科学研究与技术开发计划项目(桂科攻1598009-1);广西大学科研基金资助项目(XJZ130358)


Mechanical performance of RC beams strengthened with GFRP sheets in alkali environment
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    摘要:

    为了研究碱环境对玻璃纤维布加固钢筋混凝土梁受力性能的影响,对经历碱溶液侵蚀作用后的玻璃纤维布和玻璃纤维布加固钢筋混凝土梁试件分别开展单调静力试验。研究表明:碱环境下玻璃纤维布的受力性能退化明显,但浸渍树脂的存在可显著改善其耐久性能;在pH值为12.8的碱溶液中浸泡60 d后,玻璃纤维布加固钢筋混凝土梁的承载能力和变形性能无明显退化;GFRP加固钢筋混凝土梁的受力性能与玻璃纤维布和混凝土梁界面处的粘结性能密切相关。

    Abstract:

    To investigate the influence of alkali environment on the mechanical performance of reinforced concrete (RC) beams strengthened with GFRP sheets, monotonic static tests were conducted on GFRP sheets and RC beams strengthened with GFRP sheets respectively.Which had been subjected tothe corrosion of alkal:solution Experimental results show that mechanical performance of GFRP sheets degenerates significantly in alkali environment, while the impregnating resin can obviously improve the durability of GFRP sheets. Degeneration of the bearing capacity and deformation performance of the strengthened beams is not apparent after being soaked in the alkali solution with pH 12.8 for 60 days. Mechanical performance of the strengthened beams is closely related to the interface adhesive property between GFRP sheets and RC beams.

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杨涛,郝海超,卢维平,郑宏宇.碱环境下玻璃纤维布加固钢筋混凝土梁的受力性能[J].河北工程大学自然版,2016,33(4):1-4

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  • 收稿日期:2016-08-28
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  • 在线发布日期: 2016-12-28
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