FRP网格拉伸性能及加固水下混凝土试验研究

复合材料科学与工程 ›› 2014, Vol. 0 ›› Issue (7): 10-15.

FRP网格拉伸性能及加固水下混凝土试验研究

魏洋^1*, 纪军¹, 张敏²

1.南京林业大学土木工程学院,南京210037;
2.北京特希达技术研发有限公司,北京210018

收稿日期:2013-10-22 发布日期:2021-09-15
作者简介:魏洋(1978-),男,博士,副教授,国家一级注册结构工程师,主要从事复合材料及其在土木工程中的应用研究,wy78@njfu.edu.cn。
基金资助:
交通部西部交通建设科技项目(2011318816980);国家自然科学基金(51208262);江苏高校优势学科建设工程资助项目(PAPD)

EXPERIMENTAL INVESTIGATION ON TENSILE PERFORMANCE OF FRP GRIDS AND ITS APPLICATION AS STRENGTHENING MATERIALS FOR UNDERWATER CONCRETE

WEI Yang^1*, JI Jun¹, ZHANG Min²

1. College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China;
2. Beijing Texida R&D Co. , Ltd. , Beijing 100011, China

Received:2013-10-22 Published:2021-09-15

摘要/Abstract

摘要： FRP网格以其轻质、耐腐蚀、加固效果显著,在土木工程领域具有很好的应用前景,但其传统的手糊制作工艺影响了制品的质量及性能的稳定性,限制了其工程应用。本文采用真空辅助成型工艺(VARI),研究开发了实用的FRP网格制品的制备工艺,制作了玄武岩纤维和碳纤维为增强体的两种规格FRP网格,并截取了相应的3种网格拉伸试件进行试验研究。试验结果表明,FRP网格制品的弹性模量较为稳定,极限强度与极限应变的离散性较大,随着FRP网格筋的纤维用量增加,纤维可能出现缺陷破坏的概率增大,其可获得的强度和应变能力下降,而弹性模量无显著变化;不同纤维增强体的FRP网格表现出不同的拉伸性能,玄武岩纤维网格筋的极限强度与弹性模量低于碳纤维网格筋,但极限应变要高于后者;FRP网格加固混凝土水下结构的技术效果得到了试验验证,加固试件的承载力及变形能力得到显著的提高。

关键词: 纤维, FRP, 网格, 拉伸性能, 加固

Abstract: With the advantages of lightweight, corrosion resistance, remarkable strengthening effect, FRP grids have good application prospects in the field of civil engineering. However, the manufacturing technology of traditional hand lay-up affects the quality of the products and the stability of their performance and limits their applications in engineering. The technology of Vacuum Assisted Resin Infusion (VARI) was employed and developed to manufacture the FRP grids in this paper, and two types of FRP grids made of basalt fiber and carbon fiber were manufactured. The corresponding three kinds of tensile specimens cut from the FRP grids were tested. The experimental results indicate that the elastic modulus of FRP grids is stable, whereas the ultimate strength and ultimate strain show large deviation. With the increasing of the fibers of FRP grids, the failure probability due to defects of fibers increases, and the available strength and strain ability decrease, and the elastic modulus is not significantly varied. The different FRP grids reinforced with various types of fibers exhibit different mechanical properties. Basalt fiber reinforced plastic grids have lower ultimate strength and elastic modulus than carbon fiber reinforced plastic grids, but the former has larger ultimate strain than the latter. The effectiveness of underwater concrete columns strengthened with FRP grids was validated, and the strengthened columns have a significant increase in load carrying and deformation ability.

Key words: fiber, FRP, grids, tensile performance, strengthening

中图分类号:

魏洋, 纪军, 张敏. FRP网格拉伸性能及加固水下混凝土试验研究[J]. 复合材料科学与工程, 2014, 0(7): 10-15.

WEI Yang, JI Jun, ZHANG Min. EXPERIMENTAL INVESTIGATION ON TENSILE PERFORMANCE OF FRP GRIDS AND ITS APPLICATION AS STRENGTHENING MATERIALS FOR UNDERWATER CONCRETE[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(7): 10-15.

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