滚珠式文物展柜隔震装置性能试验  

Evaluation of the performance of a rolling-type isolation device for museum showcases by shaking table tests

作　　者：周乾 闫维明[3] 纪金豹[3] ZHOU Qian;YAN Weiming;JI Jinbao(School of Cultural History and Tourism,Datong University,Datong 037009,China;The Palace Museum,Beijing 100009,China;Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit(Beijing University of Technology),Beijing 100124,China)

机构地区：[1]大同大学历史与旅游文化学院,山西大同037009 [2]故宫博物院,北京100009 [3]工程抗震与结构诊治北京市重点实验室(北京工业大学),北京100124

出　　处：《文物保护与考古科学》2019年第6期32-45,共14页Sciences of Conservation and Archaeology

基　　金：国家自然科学基金面上项目资助(51278013,51578024);文化部科技创新项目资助(17-2009);故宫博物院科研基金项目资助(KT2012-7)

摘　　要：为有效减小馆藏浮放文物的震害,研制了一款滚珠式文物展柜水平隔震装置。制作了2个文物展柜模型,并在各模型内浮放文物仿品。分别考虑文物展柜底部安装隔震装置、展柜底部浮放地面,进行了振动台对比试验,检测了隔震装置的效果。结果表明:与非隔震条件相比,隔震体系的基频减小,阻尼比增大;地震作用下,隔震体系中的文物仿品产生的位移、加速度峰值明显减小。但是隔震条件下,文物仿品的动力放大系数仍有大于1的情况,且隔震装置的复位能力尚需提高。建议对隔震装置采取的改进措施主要适当减小基频、增大阻尼比、提高加工精度等。To effectively mitigate damage to cultural objects in museums, we have developed a rolling-type horizontal isolation device which can be used for showcases for cultural objects. In order to evaluate its performance, we made two showcase models in each of which a cultural relic imitation was placed in a freestanding way, and carried out shaking table tests on them for comparison. One showcase was placed freestanding directly on the bed of the shaker table, while the other was fixed at the bottom to the isolation device which was then placed freestanding on the shaker table. The results show that, compared with the non-isolation case, the isolation system has a smaller basic frequency and a larger damping ratio. Under the effects of horizontal earthquakes, utilization of the isolation device results in smaller displacement and acceleration responses, but its dynamic magnification coefficient still sometimes exceeds 1. Furthermore, the reset ability of the isolation device also needs improvement. It is suggested that measures need to be taken to further decrease the basic frequency, increase the damping ratio, and improve the machining precision, etc. of the isolation device.

关 键 词：滚珠式 水平隔震 文物展柜 振动台试验 

分 类 号：TU352.11[建筑科学—结构工程]