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Cyclic performance of splice connections for hollow section fibre reinforced polymer members

机译：中空截面纤维增强聚合物构件的剪接连接的循环性能

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摘要

This study investigates the cyclic performance of splice connections developed for hollow section fibre reinforced polymer (FRP) members. Splice connection specimens, each consisting of a steel bolted flange joint between two hollow section steel-FRP bonded sleeve joints, are prepared in three configurations with difference in bolt arrangement or bond length. Correspondingly, detailed finite element (FE) models are constructed with consideration of yielding of the steels, damage in the adhesive bond, pre-tensioning of the bolts and contact between the bolt-fastened parts. Tested under a cyclic flexural loading, the specimens experience different levels of yielding in the steel flange-plates before ultimate failure in the FRP member or in the steel flange-plate. Excellent ductility and energy dissipation capacity are demonstrated in a specimen where plastic deformation of the steel flange-plates is fully developed. The strain responses are also analysed to identify damage in the adhesive bond and yielding in the flange-plates. The FE modelling agrees well with the experimental results in terms of moment-rotation and load-strain responses, and can also predict the initiation of the ultimate failure in the FRP using the Tsai-Wu failure criterion.
机译：本研究研究了为中空截面纤维增强聚合物（FRP）构件开发的剪接连接的循环性能。拼接连接样品，每个中空截面钢 - FRP键合套筒接头之间的钢螺栓凸缘接头组成，用三种配置制备，其中螺栓布置或粘合长度差。相应地，考虑到钢的屈服，粘合剂损坏，螺栓的预张紧和螺栓紧固部件之间的接触，构建详细的有限元（FE）模型。在循环弯曲载荷下测试，试样在FRP构件或钢法兰板中的最终故障之前经历钢制凸缘板中的不同水平。优异的延展性和能量耗散能力在钢法兰板的塑性变形完全开发中。还分析应变响应以识别粘合剂键的损伤并在凸缘板中屈服。在力矩旋转和负载 - 应变响应方面，该FE模型与实验结果很好，并且还可以使用TSAI-WU故障标准预测FRP中最终失败的启动。

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