- 摘 要
-
（1 清華大學(xué)土木工程安全與耐久教育部重點試驗室， 北京 100084； 2 清華大學(xué)城市軌道交通綠色與安全建造技術(shù)國家工程實驗室， 北京 100084； 3 清華大學(xué)基建規(guī)劃處， 北京 100084； 4 中國地震局地震工程與工程振動重點實驗室， 哈爾濱 150080；5 華潤燃?xì)饪毓捎邢薰荆?深圳 518063）
［摘要］黏彈性阻尼器的傳統(tǒng)Kelvin力學(xué)模型僅考慮其頻率相關(guān)性，但擬靜力試驗發(fā)現(xiàn)在大應(yīng)變幅值下，黏彈性阻尼器的滯回特性存在顯著的位移相關(guān)性。提出Bilinear-Viscous（BV）模型可同時表征壁式黏彈性阻尼器的頻率相關(guān)性和位移相關(guān)性。通過與試驗結(jié)果對比，該模型具有良好的精度和普適性。以某10層混凝土框架結(jié)構(gòu)為分析對象，采用非線性時程分析方法，從屈服模式、變形和耗能多個方面對比了BV模型和傳統(tǒng)Kelvin模型對于減震框架地震響應(yīng)的影響。分析結(jié)果表明，采用BV模型的減震框架地震響應(yīng)強(qiáng)于采用傳統(tǒng)Kelvin模型的減震框架，說明BV模型可偏保守地估計結(jié)構(gòu)地震響應(yīng)。
［關(guān)鍵詞］黏彈性阻尼器； BV模型； 位移相關(guān)性； 非線性時程分析； 耗能比
中圖分類號：TU391文獻(xiàn)標(biāo)識碼：A文章編號：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
*國家重點研發(fā)計劃資助（2016YFC0701901）。
作者簡介：劉繼新，碩士研究生，Email:liujixin@mail.tsinghua.edu.cn。
