足尺三层单跨框架结构-展柜-文物系统振动台试验研究  

Shake table test research on artifacts in showcases within a full-scale three-story one-bay frame structure

作　　者：刘佩[1] 杨维国[1] 葛家琪 邹晓光 王萌[1] 马伯涛 LIU Pei;YANG Weiguo;GE Jiaqi;ZOU Xiaoguang;WANG Meng;MA Botao(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044;China Aviation Planning and Design Institute(Group)Co.,Ltd,Beijing 100120)

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]中国航空规划设计研究总院有限公司,北京100120

出　　处：《建筑结构学报》2023年第8期24-35,共12页Journal of Building Structures

基　　金：国家重点研发计划(2019YFC1521000)。

摘　　要：为获得更多的馆藏文物震害数据及文物预防保护工作的科学实施,开展了足尺三层单跨框架结构-展柜-文物系统的振动台试验,对系统的地震响应及文物的破坏情况进行了研究。以三层钢筋混凝土框架结构模型代表博物馆结构,共设置6个展柜及23件浮放和限位文物模型。采用6条天然地震波,峰值加速度调幅范围为0.1g~0.62g,共进行了15次加载。获取了楼层加速度时程、展柜台面加速度时程、不同楼层上和展柜内浮放玻璃砖和陶瓷笔筒的滑移时程、不同体形的浮放花瓶的摇摆时程、不同楼层上亚克力卡固大号梅瓶和鱼线栓绑中号梅瓶的运动状态。结果表明:第二层和第三层楼面相对于振动台面的峰值加速度放大系数范围分别为0.92~2.15和1.28~3.93,同一条地震波激励下在钢筋开始屈服对应工况的放大系数最小;展柜台面相对于楼层的峰值加速度放大系数范围为0.82~1.98;峰值加速度为0.62g时,第三层楼面砂纸上玻璃砖的最大滑移量为103 mm,而亚克力板上陶瓷笔筒的最大滑移量仅为17 mm;位于振动台面的冬瓜瓶在峰值加速度为0.4g时处于静止状态,但在峰值加速度为0.31g时发生了倾覆,受花瓶底面不平整的影响,倾覆现象不一定随峰值加速度的增大而连续出现;各浮放花瓶在地震激励下基本静止或一摇即倒;随型卡固件对极罕遇地震作用下第三层楼面上的大号梅瓶的摇摆响应控制效果不佳,卡固与栓绑的组合方式对控制中号梅瓶的运动响应有效。In order to obtain more data about seismic failure of museum artifacts and provide suggestions for scientifically performing seismic protection of museum artifacts,the shake table tests of a system comprised of artifacts in showcases within a full-scale three-story one-bay frame structure model were conducted.The seismic response of the system and the failure modes of the artifacts were investigated.The three-story reinforced concrete frame structure model was represented as the museum structure.There were six showcases and 23 freestanding and restrained artifact specimens inside the structure.Six earthquake records were selected with the peak ground acceleration(PGA)values scaled from 0.1g to 0.62g in 15 loading cases.The acceleration time histories of floor and showcase platform,the sliding displacement time histories of the freestanding glass blocks and ceramic pen containers on different floors and in different showcases,the rocking angle time histories of freestanding vases with different shapes,and the motion modes of medium-sized vases tied by fishing lines and restrained large-sized vases on different floors were recorded.The conclusions are drawn that the amplification factor,which is the ratio of the peak floor acceleration(PFA)to the PGA,ranges from 0.92 to 2.15 at the second-floor level,and it ranges from 1.28 to 3.93 at the third-floor level.The amplification factor has the smallest value in the case when the longitudinal reinforcing steels in the columns begin yielding.The amplification factor which is the ratio of the peak showcase platform acceleration to the PFA ranges from 0.82 to 1.98.The peak sliding displacement of the glass block on the sand paper on the third floor is 103 mm at the PGA level of 0.62g,while it is only 17 mm for the ceramic pen container on the polymethyl methacrylate board.The freestanding vase of white gourd-shape on the platform of the shake table is static at PGA=0.4g while overturns at PGA=0.31g.Overturning of the vase does not necessarily occur with the increase of the

关 键 词：结构-展柜-文物系统 浮放文物 限位文物 振动台试验 滑移 摇摆 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1