已有研究表明，榫卯-灌浆套筒混合连接装配式方墩（简称混合连接拼装桥墩）的抗震性能接近于整体现浇桥墩。为进一步探讨混合连接拼装桥墩的轴压性能，以钢管的长度、直径以及壁厚等为变化参数，进行1个整体现浇桥墩（编号ZT）和4个混合连接拼装桥墩（编号GTA-0~GTD-0）的轴压承载力试验，结果表明：GTA-0~GTD-0试件的承载力比ZT试件提高了10.1%~14.4%，其延性系数均大于ZT试件；GTA-0~GTD-0试件的轴压承载力随钢管直径和长度的增大而增大，而钢管壁厚对于试件承载力的影响较小；拼装桥墩的破坏位置随着钢管长度的增加而上移，逐渐接近于整体现浇桥墩，但二者的破坏模式基本相同。相关研究结论可为工程设计提供参考借鉴。

Existing studies have shown that the seismic performance of the mortise and grouting sleeve mixed connection assembled square pier (referred to as the mixed connection assembled pier) is close to that of the integral cast-in-place pier. In order to further explore the axial compression performance of the mixed-connected bridge piers, the length, diameter and wall thickness of the steel pipe are used as the variable parameters,Carry out the axial compression bearing capacity test of 1 integral cast-in-place bridge pier (No. ZT) and 4 mixed connection and assembled bridge piers (No. GTA-0~GTD-0), The results show: The bearing capacity of GTA-0~GTD-0 specimens is 10.1%~14.4% higher than that of ZT specimens, and their ductility coefficients are all greater than that of ZT specimens; The axial compression bearing capacity of GTA-0~GTD-0 specimens increases with the increase of the diameter and length of the steel pipe, while the wall thickness of the steel pipe has a small effect on the bearing capacity of the specimen;The damage position of the assembled bridge pier moves upward with the increase of the steel pipe length, and gradually approaches the integral cast-in-place bridge pier, but the failure modes of the two are basically the same. Relevant research conclusions can provide reference for engineering design.

福建省自然科学基金项目