装配式拱桥加固立柱节点抗震性能研究

Seismic Performance of Column Nodes Strengthened by Fabricated Arch Bridge

分别对装配式钢筋混凝土拱桥拱肋与立柱的3种不同的节点加固方式的试验模型进行拟静力实验,获得滞回曲线等等,分析装配式形式的钢筋混凝土拱桥拱肋亦或者是立柱加固连接节点的相关的破坏机制。试验表明:3组试件破坏均出现在立柱与杯口接缝处,这几种加固的形式一般情况下都能够提升结构的抗震方面的相关的性能,而且滞回曲线饱满,抗震性能良好。结果表明8 mm厚钢板加固效果最优,碳纤维加固次之,植肋增大截面加固效果不明显。

Perform pseudo-static experiments on the test models of three different joint reinforcement methods of the prefabricated reinforced concrete arch bridge arch ribs and columns,obtain hysteretic curves,etc.,analyze the prefabricated reinforced concrete arch bridge arch ribs or column reinforcement related destruction mechanism of connecting nodes.Tests show that the failures of the three groups of specimens all appear at the joints between the column and the cup mouth.These types of reinforcement can generally improve the seismic performance of the structure,and the hysteresis curve is full and the seismic performance is good.The results show that the 8 mm-thick steel plate has the best reinforcement effect,followed by carbon fiber reinforcement,and the reinforcement effect of planting bars to increase the section is not obvious.