- 摘 要
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（1 清華大學土木工程系， 北京 100084； 2 清華大學土木工程安全與耐久教育部重點實驗室， 北京 100084； 3 西南交通大學橋梁工程系， 成都 610031）
［摘要］摩擦消能器通過摩擦生熱耗散能量，但摩擦材料溫度的升高可能引起摩擦系數(shù)改變，導致消能器的恢復力出現(xiàn)明顯變化，故針對摩擦消能器的溫度依存性展開了研究。設計并制作了典型的摩擦消能器，通過試驗考察了不同面壓的摩擦消能器在不同加載頻率的外荷載下的滯回性能，試驗中也觀測了摩擦材料溫度的變化情況。試驗結(jié)果表明，隨著加載的進行，摩擦材料溫度有所升高。隨著加載頻率和面壓的增加，摩擦材料的升溫速率有所提高。根據(jù)大量試驗數(shù)據(jù)，考察了加載頻率和面壓對于升溫速度的影響，提出了溫度-恢復力的計算公式，并擬合分析得到公式中的關鍵參數(shù)。通過兩組附加試驗，證明該公式具有良好的精度。
［關鍵詞］摩擦消能器； 加載頻率； 面壓； 溫度； 恢復力
中圖分類號：TU391文獻標識碼：A文章編號：1002-848X(2019)07-0128-05
Experimental study on temperature dependence of friction dampers
Sun Jiangbo1, Pan Peng2, Deng Kailai3
(1 Department of Civil Engineering, Tsinghua University, Beijing 100084, China； 2 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Tsinghua University, Beijing 100084, China；3 Department of Bridge Engineering, Southwest Jiaotong University, Chengdu 610031, China)
Abstract:Friction damper dissipates energy by generating frictional heat, but the temperature increase of friction material will cause the change of friction factor, leading to the change of the restoring force. The temperature dependence of friction dampers was studied. A typical friction damper was designed and fabricated. The hysteretic behavior of the friction damper with different surface pressures under external loads with different loading frequency was investigated through tests. The temperature of the friction materials was also observed in the test. The test results show that the temperature of the friction material increases as the loading progresses. As the loading frequency and surface pressure increase, the heating rate of the friction material increases. According to a large number of experimental data, the effects of loading frequency and surface pressure on the heating rate were investigated. The formula of temperature-recovery force was proposed and the key parameters in the formula were obtained by fitting analysis. The two sets of additional tests prove that the formula has good accuracy.
Keywords:friction damper; loading frequency; surface pressure; temperature; restoring force
*北京市科技計劃課題（Z161100001216015），建筑安全與環(huán)境國家重點實驗室暨國家建筑工程技術(shù)研究中心開放課題基金資助（Supported by the Opening Funds of State Key Laboratory of Building Safety and Built Environment and National Engineering Research Center of Building Technology）（BSBE2017-01）。通訊作者：潘鵬，博士，教授，Email: panpeng@tsinghua.edu.cn。
