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High-speed pullout behavior of deep-mounted cfrp strips bonded with a flexible adhesive to clay brick masonry
Structures ( IF 3.9 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.istruc.2020.09.026
Ö.S. Türkmen , S.N.M. Wijte , J. Vaculik , B.T. De Vries , J.M. Ingham

An experimental campaign was initiated to determine the high-speed pullout behavior of deep-mounted carbon fibre-reinforced polymer (CFRP) strips bonded with a flexible, visco-elasto-plastic adhesive to clay brick masonry. A total of 14 direct pull-tests were conducted. Strong correlations were found between both the pull-out strength/bonded length relation and the pull-out strength/loading rate relation. The governing failure mechanism was either cohesive failure combined with brick splitting, or CFRP rupture without significant damage to the masonry prism. From the strain gauge readings, multiple bond-slip correlations were constructed and eventually generalized and simplified to a global, multi-linear bond-slip relation. Using the global bond-slip law as part of a partial-interaction analysis resulted in a good fit with the experimental results. Finally, the results of this study were compared to previous direct pull-tests found in literature, showing that the application of a flexible adhesive results in higher interfacial fracture energy and higher debonding slip.



中文翻译:

深层安装的cfrp条的高速拉拔行为,用柔性粘合剂粘接到粘土砖砌体上

发起了一项实验活动,以确定与柔性,粘弹塑性胶粘剂粘结在粘土砖砌体上的深层安装碳纤维增强聚合物(CFRP)条的高速拉拔性能。总共进行了14次直接拉力测试。在拉出强度/粘结长度关系与拉出强度/载荷率关系之间都发现强相关性。主导的失效机制是内聚失效与砖块破裂相结合,或者是CFRP破裂而对砌体棱镜没有明显损坏。从应变仪读数中,构造了多个键滑相关性,并最终将其推广和简化为整体的多线性键滑相关性。使用整体结合滑移定律作为部分相互作用分析的一部分,与实验结果非常吻合。

更新日期:2020-10-02
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