土木工程用CFRP筋弯折抗拉性能

发布时间：2018-01-16 02:36

本文关键词：土木工程用CFRP筋弯折抗拉性能　出处：《复合材料学报》2014年05期 　论文类型：期刊论文

【摘要】：针对碳纤维增强复合材料(CFRP)筋应用于土木工程过程中的弯折抗拉性能,开发了新型的抗拉强度测试技术对CFRP筋材真实抗拉强度进行了实测。利用模型试验对不同弯折角度下CFRP筋的弯折抗拉强度进行了测试,获得了CFRP筋应用于土木工程时对应弯折状态下的弯折抗拉强度折减系数,并拟合出该系数的经验公式。结果表明:现有的CFRP筋材抗拉强度测试技术的测试结果明显偏低,新开发的测试技术较之提高的幅度超过9%;给出的计算公式能预测不同折角下弯折抗拉强度的折减系数,当折角达到3°时,CFRP筋弯折抗拉强度较直线状态下降了18.9%。因此,在实际工程应用过程中,即使发生较小角度的弯折,也需考虑弯折对CFRP筋抗拉性能的折减。
[Abstract]:The flexural and tensile properties of carbon fiber reinforced composites (CFRP-) tendons applied in civil engineering are discussed. A new tensile strength testing technique was developed to measure the real tensile strength of CFRP bars. The flexural tensile strength of CFRP tendons at different bending angles was tested by model test. The bending tensile strength reduction coefficient of CFRP bars applied to civil engineering under bending state is obtained. The empirical formula of the coefficient is fitted. The results show that the test results of the existing CFRP steel bar tensile strength test technology are obviously low, and the newly developed test technology is more than 9 percent higher than that of the newly developed test technology. The calculated formula can predict the reduction coefficient of bending tensile strength at different bending angles. When the bending angle reaches 3 掳, the bending tensile strength of CFRP bars decreases by 18.9% compared with the straight state. In the process of practical engineering application, even if a small angle of bending occurs, it is necessary to consider the reduction of tensile properties of CFRP bars by bending.
【作者单位】：宁波大学建筑工程与环境学院;上海市建筑科学研究院上海市工程结构新技术重点实验室;浙江工业大学建筑工程学院;
【基金】：国家自然科学基金(51208269) 浙江省公益性技术应用研究计划(2014C33009) 宁波市自然科学基金(2013A610197) 上海市工程结构新技术重点实验室开放课题(2013-KF06)
【分类号】：TU377.9;TU317.1
【正文快照】： 引用格式:诸葛萍,章子华,丁勇,等.土木工程用CFRP筋弯折抗拉性能[J].复合材料学报,2014,31(5):1300-1305.Zhuge Ping,ZhangZihua,Ding Yong,et al.Tensile performance with bending of CFRP tendons used in civil engineering[J].Acta Materiae Composi-tae Sinica,2014,31(

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