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针对纤维增强复合材料(FRP)型材在土建交通领域应用中出现的接头效率低、质量无法保证等缺陷,提出了一种新型FRP型材连接节点:绑扎胶结复合连接节点。通过对该种新型连接节点进行试验,并设置了螺栓节点、胶结节点等对比试验,证明了绑扎胶结复合连接节点具有很高的接头效率,其承载力是螺栓连接节点的3.8倍、胶结连接节点的3.5倍。总结对比了各节点破坏形式,发现传统连接节点发生节点区脆性破坏,而绑扎胶结复合连接节点发生母材破坏,且破坏有一定的延性。根据试验中得到的荷载-位移曲线,对比分析了3种连接节点的刚度、延性等异同点。根据试验现象及结果分析了绑扎胶结复合连接节点的工作机理。
Aiming at the defects of low efficiency and unmanageable quality of fiber reinforced composite (FRP) profiles in the field of civil traffic, a novel FRP profiled connection node is proposed. Through the experiment of the new type of connection node and the comparison of bolted joints and cemented joints, it is proved that the lashing composite joint has high joint efficiency and the bearing capacity is 3.8 times that of the bolted joints. The cemented joints 3.5 times. The failure modes of each node are summarized and compared. It is found that the traditional connection node has the brittle failure of the node region, while the base material of the bonded connection node has been destroyed, and the damage has some ductility. According to the load-displacement curve obtained in the experiment, the similarities and differences of the stiffness and ductility of the three kinds of joints are analyzed and compared. According to the test phenomenon and the result, the working mechanism of the lashing cement joint is analyzed.