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doi:10.3785/j.issn.1008-973X.2014.10.016

JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE)

Optimization design and fatigue test of new CFRP tendon anchor assembly

ZHUGE Ping1, DING Yong1, HOU Su-wei2, QIANG Shi-zhong2

1. School of Architectural, Civil Engineering and Environment, Ningbo University, Ningbo 315211, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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Abstract

A new all-purpose CFRP tendon wedge-type anchor system was presented, which consists of a barrel, four-type wedges, and an aluminum sleeve glued with quartz sand in the internal surface. Optimization design of the anchor system was conducted for anchoring all kinds of surface conditions of CFRP tendons even for plain round surface condition based on theoretical analyzing. The fatigue performance was tested. Results show that the anchor system can bear with two million times cyclic loading with the stress range of 7% of ultimate tensile strength no matter to plain round or spiral surface condition of CFRP tendons. The CFRP tendons interface in anchorage zone was almost undamaged after fatigue testing, and the potential of anti-fatigue performance was large. The most relative displacement between elements of the assemblies were produced by the max tensile load before cyclic loading during the fatigue testing, and these displacement will almost no effect on the mechanics of structures when the anchors being applied in it.

Published: 01 October 2014

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TU 757

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Cite this article:

ZHUGE Ping, DING Yong, HOU Su-wei, QIANG Shi-zhong.

Optimization design and fatigue test of new CFRP tendon anchor assembly

. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 2014, 48(10): 1822-1827.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2014.10.016 OR http://www.zjujournals.com/eng/Y2014/V48/I10/1822

新型CFRP筋锚具优化设计及疲劳性能试验

开发通用型CFRP筋夹片式锚具,它由锚杯、夹片及涂石英砂铝套管组成.在理论计算的基础上,对该锚具开展能够锚固包括光圆在内的各种表面形式CFRP筋的优化设计,对疲劳性能进行试验研究.结果表明,不管是光圆的还是压纹的CFRP筋,对应的锚固体系经200万次应力幅为极限拉应力7%的循环荷载作用后,均未出现明显受损的迹象,抗疲劳潜能较大.在疲劳试验过程中,CFRP筋-锚具及锚具组件间相对位移的绝大部分是由循环荷载作用前的最大拉力产生的,组件间的相对位移对锚固体系应用于实际工程时结构受力几乎不产生影响.

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[1]	ZHUGE Ping, DING Yong, HOU Su-wei, QIANG Shi-zhong. Optimization design and fatigue test of new CFRP tendon anchor assembly [J]. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 0, (): 1822-1827.

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