（1 清华大学土木工程安全与耐久教育部重点试验室， 北京 100084； 2 清华大学城市轨道交通绿色与安全建造技术国家工程实验室， 北京 100084； 3 清华大学基建规划处， 北京 100084； 4 中国地震局地震工程与工程振动重点实验室， 哈尔滨 150080；5 华润燃气控股有限公司， 深圳 518063）

［摘要］黏弹性阻尼器的传统Kelvin力学模型仅考虑其频率相关性，但拟静力试验发现在大应变幅值下，黏弹性阻尼器的滞回特性存在显著的位移相关性。提出Bilinear-Viscous（BV）模型可同时表征壁式黏弹性阻尼器的频率相关性和位移相关性。通过与试验结果对比，该模型具有良好的精度和普适性。以某10层混凝土框架结构为分析对象，采用非线性时程分析方法，从屈服模式、变形和耗能多个方面对比了BV模型和传统Kelvin模型对于减震框架地震响应的影响。分析结果表明，采用BV模型的减震框架地震响应强于采用传统Kelvin模型的减震框架，说明BV模型可偏保守地估计结构地震响应。

［关键词］黏弹性阻尼器； BV模型； 位移相关性； 非线性时程分析； 耗能比

中图分类号：TU391文献标识码：A文章编号：1002-848X(2019)17-0108-06

Analysis on  Bilinear-Viscous mechanical model of wall-shape viscoelastic damper and its energy dissipation effect

Liu Jixin1，2, Bao Qichang3, Pan Peng1,2, Wang Tao4, Zhao Gang5

(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China; 2 National Engineering Laboratory for Green and Safe Construction Technology in Urban Rail Transit, Tsinghua University, Beijing 100084, China； 3 Infrastructure Planning Office, Tsinghua University, Beijing 100084, China; 4 Key Laboratory of Earthquake Engineering and Engineering Vibration，China Earthquake Administration，Harbin 150080，China; 5 China Resources Gas Group Limited, Shenzhen 518063, China)

Abstract:The traditional Kelvin model of viscoelastic dampers only considers its frequency dependence, but the quasi-static test suggested that the hysteretic characteristics of viscoelastic dampers is significantly displacement dependent when sustaining large shear deformation. The novel Bilinear-Viscous (BV) model was proposed, which can simultaneously characterize the frequency dependence and displacement dependence of the wall-shape viscoelastic damper. Compared with the experimental results, the BV model delivered good accuracy and universality under variable loading conditions. Taking a 10-story concrete frame structure as analysis object, the nonlinear time-history analyses were performed to compare the impact of BV model and traditional Kelvin model on the seismic response of the structure from various aspects such as damage mode, lateral drift and energy dissipation. The analysis results indicate that the seismic response of the BV frame is larger than the Kelvin frame, which indicated that the BV model delivered the conservative estimation of the seismic response of the structure.

Keywords:viscoelastic damper; Bilinear-Viscous model; displacement dependence; nonlinear time-history analysis; energy consumption ratio

*国家重点研发计划资助（2016YFC0701901）。

作者简介：刘继新，硕士研究生，Email:liujixin@mail.tsinghua.edu.cn。