CFRP拉索研制及其力学性能研究

玻璃钢/复合材料 ›› 2019, Vol. 0 ›› Issue (6): 80-84.

CFRP拉索研制及其力学性能研究

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:2018-09-04 出版日期:2019-06-25 发布日期:2019-06-28
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研究与开发方面的研究,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:
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)

RESEARCH ON CARBON FIBER REINFORCED POLYMER STAY-CABLE AND ITS MECHANICAL PROPERTY

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:2018-09-04 Online:2019-06-25 Published:2019-06-28

摘要/Abstract

摘要： 设计了一种新型CFRP拉索结构与制索方法,改变了以往CFRP拉索中CFRP筋平行排布的方式,将索体中CFRP筋进行扭结,在锚固端将CFRP筋发散开来,对研制出来的CFRP拉索进行了静载拉伸试验与拉-拉疲劳试验研究。试验结果表明:提出的新型CFRP拉索结构与制索方案切实可行,采用2.5°~3.5°扭转角与2.5°发散角适用于CFRP筋材,轻微扭转与弯折并不会导致筋材过早发生破坏;新型CFRP拉索的静载拉伸锚固效率大于95%,通过250万次疲劳加载试验,锚固部位没有损伤,拉索断丝率小于5%;随着疲劳加载循环次数的增加,CFRP拉索的弹性模量基本不变,拉索锚固端索体伸出量、筋材及锚板在锚具后端的回缩量都不超过1 mm。

关键词: 碳纤维复合材料拉索, 拉索结构, 粘结型锚固系统, 静载性能, 疲劳特性

Abstract: This paper studied a new kind of CFRP stay-cable and its mechanical property. A new structure of CFRP stay-cable was proposed and manufactured. Instead of parallel arrangement of the CFRP tendons, CFRP tendons in new structure of CFRP stay-cable is twisted together in cable and diverge in the anchor end. The tensile strength and tension-tension fatigue behaviour of the new structure of CFRP stay-cable were tested. Experimental results show that the new structure of stay-cable and its manufacturing process are feasible. The twist angle of 2.5°~3.5° and the divergence angle of 2.5° are suitable for CFRP tendons, and the slight twist and bending of tendons will not lead to premature failure. The static load tensile anchorage efficiency of the new CFRP stay-cable is more than 95%. After 2.5 million fatigue loading tests, the anchorage part is not damaged and the broken tendon rate of the cable is less than 5%. With the increase of fatigue loading cycles, the elastic modulus of the CFRP cables basically remains unchanged. The cable extension at the anchorage end and the retractions of the tendons and anchor plates at the back end of the anchorage are less than 1 mm.

Key words: carbon fiber reinforced polymer stay-cable, cable structure, adhesive anchorage system, static load property, fatigue characteristics

中图分类号:

TB332

朱元林, 刘礼华, 周佳琪, 黄盛彬. CFRP拉索研制及其力学性能研究[J]. 玻璃钢/复合材料, 2019, 0(6): 80-84.

ZHU Yuan-lin, LIU Li-hua, ZHOU Jia-qi, HUANG Sheng-bin. RESEARCH ON CARBON FIBER REINFORCED POLYMER STAY-CABLE AND ITS MECHANICAL PROPERTY[J]. Fiber Reinforced Plastics/Composites, 2019, 0(6): 80-84.

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