装配式城市桥梁下部结构连接试验研究

Experimental Study on Fabricated Substructure Connection of Urban Bridge

摘要:

为实现在高烈度区对城市桥梁装配式下部结构的应用，提出一种可应用于城市桥梁下部结构快速装配施工的钢-混组合连接，通过模型试验展开其与既有灌浆套筒连接、金属波纹管连接以及现浇墩柱的承载力对比研究，静力试验以及拟静力试验结果均表明钢-混组合连接墩柱承载力均高于现浇墩柱，灌浆套筒连接以及波纹管连接墩柱承载力略低于现浇墩柱。拟静力实验结果表明钢-混组合连接柱相较于现浇柱具有更好的耗能能力和抗震性能，证明这种连接形式具有可应用于高烈度区（设防烈度8度及以上）的适用性。

Abstract:

In order to achieve the application of fabricated substructures of urban bridge in high-intensity areas, a steel-concrete composite connection that can be used for rapid fabrication construction of urban bridge substructures is proposed. The model test is carried out to compare the bearing capacity with the existing grouting sleeve connection, metal bellows connection and cast-in-place pier column. The results of static and quasi-static tests show that the bearing capacity of steel-concrete composite connected pier column is higher than that of cast-in-place pier column. And the bearing capacity of grouting sleeve connected and bellows connected pier columns is slightly lower than that of cast-in-place pier column. The results of quasi-static experiments indicate that the steel-concrete composite connected column has better energy dissipation capacity and seismic performance than that of cast-in-place column, which proves that this connection form is applicable to high intensity areas (seismic intensity of 8 degrees and above).