不同拼接构造的装配式圆柱墩偏压性能试验

林上顺; 林永捷; 夏樟华; 杨切; 叶世集

doi:10.13204/j.gyjzG21012609

不同拼接构造的装配式圆柱墩偏压性能试验

doi: 10.13204/j.gyjzG21012609

1. 福建省土木工程新技术与信息化重点实验室(福建工程学院), 福州 350118;
2. 福州大学土木工程学院, 福州 350108

基金项目:

福建省自然科学基金项目(2019J01779,2019H6020)。

详细信息

作者简介:
林上顺,男,1972年出生,博士,教授。

通讯作者:
夏樟华,男,1980年出生,博士,副研究员,硕士生导师,Xiatian@fzu.edu.cn。

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出版历程
- 收稿日期: 2021-01-26
- 网络出版日期: 2022-07-25

Experimental Research on Mechanical Properties of Prefabricated Cylindrical Piers with Different Splicing Structures Under Eccentric Compression

1. Fujian Provincial Key Laboratory of Advanced Technology and Information in Civil Engineering (Fujian University of Technology), Fuzhou 350118, China;
2. School of Civil Engineering, Fuzhou University, Fuzhou 350108, China

摘要

摘要: 既有的试验研究表明采用CFST凸榫-灌浆套筒混合连接的装配式圆柱墩的抗震性能优于整体现浇桥墩,但目前涉及这类拼装桥墩的偏压性能试验研究较为少见。进行了采用混合连接、灌浆套筒连接、CFST凸榫连接的拼装桥墩和整体现浇桥墩的大、小偏压性能试验,对不同类型桥墩的损伤机理和破坏模式进行比较分析,并采用JTG 3362—2018规范对试件的受压承载力进行计算,结果表明:采用混合连接桥墩的破坏模式和损伤过程与整体式桥墩在总体上是相近的,均为在小偏压状态下表现为受压侧混凝土压碎破坏,在大偏压状态下表现为受拉侧钢筋屈服破坏;相对于整体现浇试件,在大、小偏压荷载作用下,混合连接试件的承载力分别提高了6%和2%、灌浆套筒连接试件的承载力分别下降了6%和提高了8%、CFST凸榫连接试件的承载力分别下降了20%和27%;与其他类型拼装桥墩试件不同,采用混合连接的拼装桥墩试件的实测承载力均大于JTG 3362—2018规范的计算结果。
- 拼装桥墩 /
- 灌浆套筒 /
- CFST凸榫 /
- 偏压试验 /
- 极限承载力
Abstract: The existing experimental studies showed that the seismic performance of prefabricated cylindrical pier with hybrid joint was better than that of cast-in-place pier, but the experimental research on the mechanical properties of this kind of assembled pier under eccentric compression was rare. The mechanical properties tests of four kinds of cylindrical piers under large or small eccentric compression were carried out, including the assembled pier with hybrid joints, the assembled pier with grouting sleeve connection, the assembled pier with CFST shear key connection and the integral cast-in-place pier. The damage mechanism and failure mode of different types of piers were compared and analyzed, and the bearing capacity of the specimens under compression was calculated by JTG 3362—2018. The results showed that: the failure mode and damage process of the pier connected by hybrid joints were similar to that of the integral bridge pier, which showed that the concrete on the compression side was crushed in the state of small eccentric compression, and the steel bar in the tensile side was yielding failure in the state of large eccentric compression. Compared with the integral cast-in-place specimens, the bearing capacity of the hybrid joint connection specimens increased by 6% under large eccentric compression and increased by 2% under small eccentric compression. The bearing capacity of the specimens connected by the grouting sleeve was reduced by 6% under large eccentric compression and increased by 8% under small eccentric compression. The bearing capacity of the specimens connected by the CFST shear key decreased by 20% under large eccentric compression and decreased by 27% under small eccentric compression. Different from other types of assembled pier specimens, the measured bearing capacity of composite pier specimens connected with hybrid joints was greater than the calculation results of JTG 3362—2018.
- assembling pier /
- grouting sleeve /
- CFST shear key /
- eccentric compression test /
- ultimate bearing capacity

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