钢筒内置可更换橡胶穿心式摩擦阻尼器滞回特性及其在自复位桥墩中的应用

doi:10.13229/j.cnki.jdxbgxb.20240758

摘要/Abstract

摘要：

兼顾阻尼器的经济性及震后可更换性，提出了由高强螺栓、钢套筒、活动挡板、固定挡板、钢拉杆及可更换橡胶组成的铜筒内置可更换橡胶穿心式摩擦阻尼器（SPRFD），并介绍其基本构造及工作原理。通过往复加载试验，考察了不同预紧力下阻尼器滞回曲线的变化规律，分析了不同加载位移下的滞回反应特征、等效刚度及等效阻尼比的变化规律，获得了可更换橡胶的摩擦损伤特征；将SPRFD应用于铁路自复位桥墩中，通过往复加载分析研究了其抗震性能。结果表明：在较小的预紧力下，阻尼器的滞回性能稳定，滞回曲线具有刚塑性模型的特征；随着预紧力的增大，往复循环及大位移加载均会因橡胶损伤导致阻尼力减小，滞回曲线具有弹塑性模型的特征。整个加载过程中，阻尼器具有较稳定的等效黏滞阻尼比。不同预紧力的SPRFD对自复位桥墩滞回曲线的影响不同，预紧力的大小影响滞回曲线卸载刚度的变化，预紧力越大，滞回曲线越捏拢，提供给自复位桥墩的抗侧强度越大。

关键词: 桥梁与隧道工程, 摩擦阻尼器, 滞回行为, 自复位桥墩, 抗震性能

Abstract:

Considering the economy of the damper and the replaceability after the earthquake， the friction damper with replaceable rubber in steel pipe （SPRFD） composed of high-strength bolts， steel pipe， movable baffles， fixed baffles， steel tie rods， and replaceable rubbers was proposed， and its basic structure and working principle were introduced. Through reciprocating loading test， the change rule of the hysteresis curve of the damper under different preloads were investigated， the change rule of the hysteresis response characteristics， equivalent stiffness and equivalent damping ratios under different loading displacements were analyzed， and the friction damage characteristic of the replaceable rubber was obtained. The seismic performance of railway self-centering bridge pier equipped with SPRFD was investigated through cyclic loading analyses. The results showed that the hysteresis performance of the damper was stable under the smaller preload， and the hysteresis loop had the characteristics of rigid-plastic model； As the preload increasing， the reciprocating cycle and large displacement loading decreased the damping force causing by rubber damage， and the hysteresis loop had the characteristics of elastic-plastic model. During the whole loading process， the dampers had a relatively stable equivalent viscous damping ratio. SPRFD with different preload had different effects on the hysteresis curve of the self-centering bridge piers. The value of the preload affected the unloading stiffness of hysteresis curve. The hysteresis curve had an obvious pinching under the larger preload. The larger preload helped the self-centering bridge pier enhance lateral strength.

Key words: bridge and tunnel engineering, friction damper, hysteresis behavior, self-centering bridge pier, seismic performance

中图分类号:

U443.22

刘正楠,唐佳伟,张维科,陈兴冲,马华军. 钢筒内置可更换橡胶穿心式摩擦阻尼器滞回特性及其在自复位桥墩中的应用[J]. 吉林大学学报(工学版), 2026, 56(2): 407-415.

Zheng-nan LIU,Jia-wei TANG,Wei-ke ZHANG,Xing-chong CHEN,Hua-jun MA. Hysteresis characteristic of the friction damper with replaceable rubber in steel pipe and its application in self-centering bridge pier[J]. Journal of Jilin University(Engineering and Technology Edition), 2026, 56(2): 407-415.

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