新型黏弹性自复位耗能支撑力学特性及减震性能研究  

Mechanical characteristics and seismic control performance of a new type of rotation-amplified viscoelastic self-centering energy-dissipation brace

作　　者：付兴[1] 郭代恩瑞 王德斌[2] 王英豪 冷迅 Fu Xing;Cuo Daienruil;Wang Debin;Wang Yinghao;Leng Xun(Dalian Uniersity of Technology,Dalian 116023,China;Dalian Jiaotong University,Dalian 116028,China;ShuifaPlanning&Design Co.,Ltd.,Jinan 250000,China)

机构地区：[1]大连理工大学,辽宁大连116023 [2]大连交通大学,辽宁大连116028 [3]水发规划设计有限公司,山东济南250000

出　　处：《土木工程学报》2025年第4期75-87,共13页China Civil Engineering Journal

基　　金：国家自然科学基金(52378483)。

摘　　要：为解决传统自复位支撑难以充分发挥其耗能性能的问题,基于桥式放大工作机理提出一种具有旋转位移放大功能的黏弹性自复位耗能支撑(RVSEB)。首先,介绍其基本构造和受力、位移及速度放大机理,对RVSEB试件进行低周往复加载试验,探讨支撑试件的支撑能力、耗能性能、复位性能及频率相关性;同时,建立其精细化有限元模型,数值模拟结果与试验结果基本吻合,验证有限元模型的准确性;最后,对附加RVSEB的双柱式桥墩结构进行非线性动力时程分析。结果表明:RVSEB支撑滞回曲线具有明显的旗帜型特征和良好的自复位性能,随着初始放大角度的减小其耗能能力和支撑能力均成倍增加;与无控结构相比,附加RVSEB双柱式桥墩结构墩顶位移、残余位移和墩底剪力均得到有效控制,罕遇地震作用下,初始放大角度为30°时,结构最大墩顶位移、墩底剪力和残余位移分别降低56.0%、87.1%和4.8%,RVSEB呈现出明显的支撑轴力放大效应,其耗能系统的变形、速度均迅速增加,支撑耗散的地震能量得到明显提高。To enhance energy dissipation performance in traditional self-centering supports,a rotation-amplified viscoelastic self-centering energy-dissipation brace(RVSEB)is proposed based on the bridge amplification working mechanism.Firstly,the basic structure and amplification mechanism of force,displacement,and velocity for the brace are introduced.Low-cycle loading tests were conducted on RVSEB specimens to explore their supporting capacity,energy dissipation performance,self-centering performance,and frequency correlation.Furthermore,a refined finite element model of RVSEB was established and validated by the experimental findings.Finally,nonlinear dynamic timehistory analysis was performed on a double-column bridge pier structure with additional RVSEBs.Results reveal that RVSEBs process distinct flag-shaped hysteresis characteristics and robust self-centering capabilities,and reducing the initial amplification angle doubles both its energy dissipation and supporting capacity.Compared with uncontrolled structures,the addition of RVSEBs effectively regulates top displacement,residual displacement,and base shear of the double-column bridge pier structure.Under rare earthquakes,with an initial amplification angle of 30°,the maximum top displacement,base shear,and residual displacement of the structure decrease by 56.0%,87.1%,and 4.8%,respectively.RVSEB presents a significant support axial force amplification effect,and the deformation and velocity of its energy dissipation system increase rapidly.The seismic energy dissipation capacity of the support is significantly improved.

关 键 词：自复位 位移放大 耗能支撑 减震控制 残余变形 

分 类 号：U443.22[建筑科学—桥梁与隧道工程]