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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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[2] Aftab A Mufti.FRPs and FOSs Lead to Innovation in Canadian Civil Engineering Structures [J].Consttuction and Building Materials，2003，17: 379-387. Hollaway L C.A Review of the Present and Future Utilisation of FRP Composites in the Civil Infrastructure with Reference to Their Important In-Service Properties[J].Construction and Building Materials，2010，24: 2419-2455. [3] 叶列平，冯鹏.FRP 在工程结构中的应用与发展[J].土木工程学报，2006，39(3): 24-34. [4] 詹界东，杜修力，邓宗才.预应力FRP 筋锚具的研究与发展[J].工业建筑，2006，36(12): 65-68. [5] Zhang B，Benmkorane B.Prediction of Tensile Capacity of Bond Anchorages for FRP Tensions [J].Journal of Composites for Construction，2000，4(2): 39-47. [6] Ahmed Elrefai，Jeffrey S West，Khaled Soudki．Performance of CFRP Tendon-Anchor Assembly Under Fatigue Loading[J].Composite Structures，2007，80: 352-360. [7] 吕志涛，梅葵花.国内首座CFRP 索斜拉桥的研究[J].土木工程学报，2007(1): 54-58. [8] 方志，梁栋.单根碳纤维(CFRP) 预应力筋粘结式锚具的试验研究[J].南华大学学报，2004，18(1): 47-51. [9] 詹界东，杜修力，王作虎.CFRP 筋夹片－ 套筒型锚具的研发[J].建筑结构学报，2009(增刊1): 339-343. [10] 刘荣桂，李十泉，李明君，等.CFRP 筋新型锚具静载试验及有限元分析[J].工业建筑，2011，41(增刊): 624-627. [11] 刘荣桂，许飞，CFRP 拉索试验桥锚具有限元分析[J].工业建筑，2009，39(12): 61-64. [12] 蒋田勇，方志.CFRP 预应力筋夹片式锚具的试验研究[J].土木工程学报，2008，41(2): 60-69. [13] 詹界东，杜修力，王作虎.CFRP 筋夹片－ 黏结型锚具的研制[J].北京工业大学学报，2011，37(3): 418-424． -
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