预张预应力-承插式预制桥墩抗震试验数值仿真

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摘要为充分利用承插式桥墩施工容差大、无粘结预应力桥墩震后可自恢复的优势，同时减少现场预应力张拉施工，提出一种承插式连接和工厂预张无粘结预应力筋连接的混合连接预制拼装桥墩。采用ABAQUS软件建立了该桥墩的三维有限元模型，基于已开展拟静力试验结果验证了该数值模型的精确性，并分析了桥墩的局部损伤、滞回行为、骨架曲线、耗能能力以及预应力筋张拉力、接缝开口等行为。结果表明：本文建立的数值模型可以较好地再现拟静力结果，混合连接预制拼装桥墩力-位移曲线表现为“旗帜型”；墩顶偏移率为5%时，墩柱仅出现横向裂缝，无其他明显结构损伤；承插深度为0.4D时承台出现轻微裂缝，0.7D时承台可以提供足够的抗拔力且无明显损伤；外包钢管和钢垫板存在应力集中现象。

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	贾俊峰 1
	王召辉 1
	许坤 1
	张向阳 2
	宋承哲 3

关键词 ：预制拼装桥墩, 拟静力试验, 数值仿真, 抗震性能

Abstract：In order to make full use of the advantages of large construction tolerance of socket piers and the self-resetting ability of unbonded prestressed piers after earthquakes, and reduce the on-site prestressed tensioning construction, a hybrid connection prefabricated pier connected by socket connection and factory pretensioned unbonded prestressed reinforcement is proposed. The three-dimensional finite element model of the bridge pier was established by ABAQUS software. The accuracy of the numerical model was verified based on the quasi-static test results. The local damage, hysteretic behavior, skeleton curve, energy dissipation capacity, prestressed tendon tension, joint opening and other behaviors of the bridge pier were analyzed. The results show that the numerical model established in this paper can reproduce the quasi-static results well, and the force-displacement curve of the precast pier with hybrid connection is "flag type"; When the deviation rate of pier top is 5%, only transverse cracks appear on the pier column, without other obvious structural damage; When the socket depth is 0.4D, the cap has slight cracks, and when the socket depth is 0.7D, the cap can provide sufficient uplift resistance without obvious damage; There is stress concentration in the outer steel pipe and steel backing plate.

Key words： precast bridge pier quasi-static test numerical simulation seismic performance

收稿日期: 2023-04-13 出版日期: 2024-01-28

引用本文:

贾俊峰 1，王召辉 1，许坤 1，张向阳 2，宋承哲 3 . 预张预应力-承插式预制桥墩抗震试验数值仿真[J]. 振动与冲击, 2024, 43(2): 254-263.
A Junfeng1, WANG Zhaohui1, XU Kun1, ZHANG Xiangyang2, SONG Chengzhe3. Numerical simulation of seismic tests for pre-tensioned prestressing precastbridge columns with socket connection. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(2): 254-263.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2024/V43/I2/254

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