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EXPERIMENTAL INVESTIGATION AND FINITE ELEMENT ANALYSIS OF WEDGE-BOND ANCHORAGE FOR CFRP-TENDONS
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摘要: 为综合粘结型锚具与夹片型锚具各自的优点,在已有碳纤维增强复合材料(简称CFRP)筋锚具的基础上,研究由粘结部分与夹持部分协同工作而成的复合型锚具。由直筒粘结型锚具的静载试验,研究胶体粘结性能,粘结长度、胶体厚度对锚固性能的影响。通过复合型锚具静载试验,研究该类锚具的失效模式、极限荷载、滑移变形等,结合锚固区实测应力变化,初步分析锚固应力的传递机制。通过有限元分析方法,模拟计算夹片倾角、锥角差、预紧力等参数对复合型锚具内部受力的影响,得到建议设计参数,为复合型锚具结构优化提供参考。Abstract: In order to colligate the virtue of bonding-anchor and wedge-anchor,the wedge-bond anchorage for CFRP tendons was investigated,which was made by bonding and wedge parts, working in parallel．Based on the characteristics of exiting CFRP tendon anchors and according to a series of static load tests,it was studied the bonding property of colloid,and the influence of bond length,colloids thickness on the performance of straight pipe bonding anchorage．The static load test of wedge-bond anchorage was conducted to investigate its failure mode,ultimate load,slip deformation,etc．Transport mechanism of anchorage stress is preliminarily analysed according to variation of actual stress in the anchorage zone．The influences of variation in specific parameters,such as wedge slope,angular differential,presetting load,on the internal stress of the anchorage were simulated by using finite element method．And the suggested design parameters were offered．Which can provide academic reference for the optimization of wedge-bond anchorage．
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Key words:
- CFRP tendon /
- wedge-bond anchor /
- anchoring mechanism /
- static load test /
- finite element analysis
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