CFRP筋粘结型锚固系统疲劳及应力松弛性能研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (3): 11-15.

CFRP筋粘结型锚固系统疲劳及应力松弛性能研究

朱元林^1,2, 刘礼华^1,2*, 周佳琪^1,2, 黄盛彬^1,2

1.江苏法尔胜研发中心有限公司,江阴214433;
2.国家金属线材制品工程技术研究中心,江阴214433

收稿日期:2018-06-11 出版日期:2019-03-28 发布日期:2019-03-28
通讯作者: 刘礼华(1965-),男,博士,教授级研究员,主要从事特大桥梁用新一代缆索材料方面的研究,liulh@chinafasten.com。
作者简介:朱元林(1983-),男,博士,高级工程师,主要从事复合材料方面的研究。
基金资助:
江苏省创新能力建设计划-企业重点实验室(BM2016023);江苏省科技成果转化专项资金(BA2016003)

EXPERIMENTAL RESEARCH ON FATIGUE CHARACTERISTICS AND STRESS RELAXATION OF ADHESIVE ANCHORAGE SYSTEM FOR CFRP TENDON

ZHU Yuan-lin^1,2, LIU Li-hua^1,2*, ZHOU Jia-qi^1,2, HUANG Sheng-bin^1,2

1.Jiangsu Fasten Research and Development Center Co., Ltd., Jiangyin 214433, China;
2.National Engineering Technology Research Center for Metal Wire Products, Jiangyin 214433, China

Received:2018-06-11 Online:2019-03-28 Published:2019-03-28

摘要/Abstract

摘要： 在三个应力水平及三个应力幅值下对CFRP筋粘结型锚固系统进行拉-拉及弯曲疲劳试验,对200万次疲劳加载后未发生破坏的试验件进行静载拉伸破坏试验,对CFRP筋粘结型锚固系统进行应力松弛性能研究。研究结果表明:研发出的单孔CFRP筋锚固系统疲劳性能优良,经历200万次的拉-拉或弯曲疲劳加载后,锚固系统没有任何损伤,疲劳加载后筋材的强度基本没有变化,弹性模量略有提高,平均提高幅度为4.3%;提出并建立的CFRP筋锚固系统应力松弛性能预测模型与试验数据吻合良好,预测1000 h锚固系统的应力松弛率的误差为4.64%;提出的CFRP筋的应力松弛性能研究方案可以有效消除锚固段内胶体变形对CFRP筋应力松弛性能测试带来的影响,获得CFRP筋1000 h应力松弛率为0.67%。

关键词: 碳纤维复合材料筋, 粘结型锚固系统, 疲劳特性, 剩余强度, 应力松弛

Abstract: The tensile fatigue and bending fatigue behaviour of CFRP tendon adhesive anchorage system were tested under three kinds of stress levels and stress amplitudes. The tensile strength of CFRP tendon anchorage system was tested after two million fatigue cycles. And the stress relaxation of CFRP tendon anchorage system was studied. Test results show that the CFRP tendon anchorage system developed is stable and reliable. The anchorage system is free of any damage after two million tensile fatigue or bending fatigue cycles. The tensile strength of CFRP tendon after fatigue test is almost unchanged, and the modulus increase by 4.3% in average. The model for predicting stress relaxation of CFRP tendon anchorage system was proposed and agreed with the measured values. The error in predicting the stress relaxation rate of the anchorage system for 1000 hours is 4.64%. The testing program for stress relaxation of CFRP tendon was proposed, and the stress relaxation rate of the CFRP tendon for 1000 hours is 0.67%, which could effectively avoid the effect of anchor adhesive deformation.

Key words: carbon fiber reinforced polymer tendon, adhesive anchorage system, fatigue characteristics, residual strength, stress relaxation

中图分类号:

TB332

朱元林, 刘礼华, 周佳琪, 黄盛彬. CFRP筋粘结型锚固系统疲劳及应力松弛性能研究[J]. 玻璃钢/复合材料, 2019, 0(3): 11-15.

ZHU Yuan-lin, LIU Li-hua, ZHOU Jia-qi, HUANG Sheng-bin. EXPERIMENTAL RESEARCH ON FATIGUE CHARACTERISTICS AND STRESS RELAXATION OF ADHESIVE ANCHORAGE SYSTEM FOR CFRP TENDON[J]. Fiber Reinforced Plastics/Composites, 2019, 0(3): 11-15.

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