作　　者： ; ; ;

机构地区： 故宫博物院

出　　处： 《地震工程学报》 2013年第2期220-225,共6页

摘　　要： 为保护馆藏浮放文物,采用振动台试验方法研究了地震作用下基于不同陈列柜边界条件下的文物滑移响应。根据展柜原型制作了1:1比例模型,分别考虑陈列柜底部浮放及固定于振动台面,进行了振动台试验。通过白噪声激励获得了两种边界条件下陈列柜的基频;通过对模型分别输入不同类型及不同强度的地震波,研究了地震作用下陈列柜及文物的震害形式,对比分析了两种边界条件下典型节点位移、加速度响应及动力放大系数。结果表明:无论陈列柜处于固定还是浮放状态,其基频远大于地震波卓越频率,因此震害较轻;对浮放文物而言,当地震波强度较小时,不同条件下文物的滑移响应为陈列柜浮放>陈列柜固定条件;当地震波强度较大时,由于陈列柜与振动台面的摩擦减震作用,文物的滑移响应为陈列柜浮放<陈列柜固定条件。为减小文物的滑移响应,陈列柜宜以浮放形式为主,并保持适当的间距。 Many museum pieces are of cultural heritage and worthy of protection for their historical and artistic values.Because such relics are usually free-standing,they are easily damaged during earthquakes.For example,the 2008 Wenchuan earthquake in China led to substantial losses of property such that at least 216 museums were affected,and more than 3169 cultural relics were damaged.Slide motion is a typical seismic response mode of museum cultural relics;large slide sizes may cause relics to drop from their display stands and incur damage.Thus,it is important to study slide response of free-standing cultural relics under earthquake conditions and adopt aseismic measures for protection.In previous works,theoretical analyses were mainly used to study the slide responses of free-standing relics.Experimental studies were insufficient,and boundary conditions of showcases were seldom considered.To determine protection measures for movable cultural relics,slide responses of free-standing cultural museum relics under earthquake conditions are studied by considering various showcase boundary conditions.1：1 scale models were created on the basis of actual of a museum showcase sizes.A glass cultural relic was placed in the showcase by free-standing mode.The static friction coefficient between the relic bottom and its base was determined to be μ = 0.15 and the barycenter height values of the showcase and relic were calculated as 556 mm and 65 mm,respectively.To study seismic responses of the relic,acceleration sensors were set on the showcase bottom and relic top.In addition,a video admeasuring apparatus was used to capture displacement response values of the relic.Shaking table tests were conducted that considered two boundary conditions of the showcase bottom including fixed and free-standing status.Frequency distributions of the showcase under both boundary conditions were obtained by white noise excitation.Three different types of earthquake waves including those of El-Centro in 1940 and Taft and Artificial of Ⅱ site cla

关 键 词： 陈列柜 边界条件 浮放文物 地震滑移响应 振动台试验

领　　域： [历史地理] [文化科学] [天文地球] [天文地球] [天文地球]