外置可更换耗能器的预制拼装自复位桥墩抗震性能试验研究

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (5) : 154-162.

论文

贾俊峰1,魏博1,欧进萍1,2,李逸松1,程寿山3

作者信息 +

Tests for seismic performance of prefabricated self-centering bridge piers with external replaceable energy dissipator

JIA Junfeng1, WEI Bo1, OU Jinping1,2, LI Yisong1, CHENG Shoushan3

Author information +

文章历史 +

摘要

基于抗震韧性设计理念，结合装配式结构技术，发展了具有外置可更换耗能器的自复位预制拼装桥墩结构。开展了两组自复位预制拼装桥墩模型结构的拟静力往复加载试验研究。介绍了往复加载过程中自复位预制拼装桥墩的受力行为及损伤过程，分析了其力-位移滞回曲线、骨架曲线、耗能能力、预应力筋张拉力变化、残余位移、接缝开口、墩底受压区高度等抗震性能。结果表明：外置耗能部件具有良好的可更换性和耗能能力，更换前后桥墩的抗震性能基本一致。自复位桥墩力-位移滞回曲线呈现出明显的“旗帜”型形态，残余位移较小，具有良好的自复位能力。随墩顶水平位移增加，墩柱内轴向预应力筋张拉力基本呈线性增加，更换耗能器后预应力筋的预应力损失减小。墩底外包钢管有效地抑制了局部混凝土压溃，钢管没有出现局部外鼓等损伤破坏。

Abstract

Based on the concept of earthquake resilience design and incorporated the key technology of precast structures, a self-centering precast bridge column (SPBC) with exterior replaceable energy dissipation devices (EDDs) was developed. Quasi-static lateral cyclic tests of two groups of scaled SPBC models were carried out to investigate and analyze its seismic behavior. The force-displacement hysteresis behavior, skeleton curve, energy dissipation capacity, tension force of prestressing tendons, residual displacement, joint opening, compression zone height at pier bottom were analyzed. The results show that the exterior EDDs adopted in the developed columns have good replaceability and energy dissipation capacity, and the seismic performance of models before and after the replacement of EDDs is basically the same. The hysteretic curves show obvious "flag" type behavior. Smaller residual displacement and good self-centering ability were produced for the SPBC models. With the increase of loading displacement, the tension forces of prestressing tendons in SPBC models increased linearly. The prestress loss was reduced after the EDDs were replaced. The exterior steel jacket at the column base can effectively restrain the local concrete damage, and the steel jacket had no damage such as local exterior bulge.

导出引用

贾俊峰1,魏博1,欧进萍1,2,李逸松1,程寿山3. 外置可更换耗能器的预制拼装自复位桥墩抗震性能试验研究[J]. 振动与冲击, 2021, 40(5): 154-162

JIA Junfeng1, WEI Bo1, OU Jinping1,2, LI Yisong1, CHENG Shoushan3. Tests for seismic performance of prefabricated self-centering bridge piers with external replaceable energy dissipator[J]. Journal of Vibration and Shock, 2021, 40(5): 154-162

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