灌浆套筒连接预制拼装桥墩抗剪性能对比试验研究

Comparative Experiment on Shear Resistance of Prefabricated Bridge Columns with Grouted Sleeve Connection

灌浆套筒连接预制拼装桥墩抗弯性能得到了广泛研究,但抗剪性能研究较少。为对比分析灌浆套筒连接预制拼装桥墩抗剪性能,制作了2个相同缩尺比的现浇和预制拼装桥墩模型。通过拟静力方式测到了两类结构极限承载力、变形和耗能能力等抗震性能指标。对比分析结果表明,预制桥墩与现浇桥墩破坏模式存在显著差异,但是预制桥墩具备与现浇桥墩相近的耗能能力及延性变形能力。本文结果可作为现有灌浆套筒连接预制拼装桥墩抗震性能研究的补充,为灌浆套筒连接预制拼装桥墩在高烈度区的应用提供参考依据。

The bending resistance of prefabricated bridge columns with grouted sleeve connection has been widely studied,but the research on its shear resistance is limited.In order to analyze the shear resistance of prefabricated bridge columns connected with grouted sleeve,we manufactured a cast-in-place(CIP)model and a prefabricated model with the same scale ratio.and then we measured the seismic performance indicators of the ultimate bearing capacity,deformation and energy dissipation capacity of the two types of structures through quasi-static tests.As the results show,the failure modes of precast columns and cast-in-situ columns are significantly different,but both forms of columns have similar energy dissipation capacity and ductile deformation capabilities.This study can serve as the supplement for researches on the seismic performance of prefabricated bridge columns connected with grouted sleeve,and provide a reference for its application in high-intensity areas.