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为研究采用水泥基复合材料(ECC)连接的装配式框架梁柱节点的抗震性能,对3个ECC连接框架节点试件和1个对比用普通混凝土框架节点试件进行低周反复荷载试验,分别研究现浇区材料、现浇区长度以及现浇区钢筋连接方式对节点抗震性能的影响。试验结果表明:使用ECC替代普通混凝土能显著提高试件的延性及耗能能力;增大ECC连接段的长度能有效提高试件的延性和耗能性能,当ECC现浇区长度增长100 mm时,耗能能力提高了20%;采用套筒连接的装配式节点具有较好的抗震性能,而采用焊接连接的装配式节点在低周反复荷载作用下很快断裂,所以在工程中不宜采用。
In order to study the seismic behavior of fabricated frame-column beam-column joints with cement-based composite (ECC) connections, three cycles of low cycle cyclic load tests were performed on the specimens of three ECC-connected frame joints and one of ordinary RC frame joints, respectively The effects of cast-in-place materials, length of cast-in-place and the connection of steel bars in cast-in-place on the seismic behavior of joints were investigated. The experimental results show that the use of ECC instead of ordinary concrete can significantly improve the ductility and energy dissipation capacity of the specimens. Increasing the length of the ECC connecting segment can effectively improve the ductility and energy dissipation performance of the specimens. When the length of ECC cast-in-place zone increases by 100 mm , And the energy dissipation capacity is increased by 20%. The fabricated joints with sleeve connection have better seismic performance, while the fabricated joints with welded joints are quickly broken under the action of low cycle repeated load, so it is not suitable for the project.