悬吊结构减震性能的振动台试验研究  

SHAKING TABLE TEST OF EARTHQUAKE RESISTANT PERFORMANCE OF SUSPENSION STRUCTURE

作　　者：于建军[1,2] 白国良[1] 杨帆[2] 李春柳[2] 马继明[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]河北科技师范学院城市建设学院,河北秦皇岛066004

出　　处：《工业建筑》2015年第11期62-69,共8页Industrial Construction

基　　金：国家自然科学基金项目(51478381);河北科技支撑计划项目(13275802);西安建筑科技大学创新团队支持项目

摘　　要：对悬吊结构博物馆文物陈列系统进行了振动台试验,研究在El Centro波、Taft波和兰州波作用下,结构自振频率、文物陈列系统重心变化、加速度响应、动力放大系数等对悬吊结构体系地震响应的影响。试验结果表明:文物陈列系统的地震响应不仅取决于输入烈度的大小,还与地震波的频谱特性及结构的自振特性等有关。当地震波强度较小(峰值加速度不大于0.20 g)时,悬吊结构体系减震效果不明显,且有地震响应增大的趋势;模型结构重心下降可以有效地降低文物的地震响应。当地震波强度较大时(峰值加速度不小于0.40 g),文物地震作用响应相应增大,晃动加剧,并出现移位、倾斜、旋转和倾倒等现象;与非减震结构相比,悬吊结构呈现出良好的减震性能;模型结构重心的降低有助于降低结构的地震响应。The shaking table tests were carried out for suspension structure of cultural relics display system of a museum. Under the action of El Centro wave,Taft wave,and Lanzhou waves,the effects of the structure＇s natural frequency,the change in center of gravity of cultural relics,acceleration response and dynamic amplification factor on the resistant performance of the suspension structure system were studied. The experimental results showed that the seismic response of cultural relics display system was not only depended on the magnitude of the input intensity,but also on the frequency spectrum characteristics of seismic wave and natural vibration characteristics of the structure.When local seismic intensity was small（ PGA≤0. 20g）,the resistant effect of suspended structure was not obvious,and there was increasing trend of model seismic response; the reduction of model structural center of gravity could effectively reduce the seismic response of cultural relics. When local seismic intensity was large（ PGA ≥0. 40g）,cultural relics of earthquake response increased accordingly,intensified shaking of the specimens occurred,and displacement,tilt,swivel and dumping phenomena also happened. Compared with the non-resistant structure,the suspended structure had a good performance of seismic resistant and shock absorption; the reduction of the center of gravity of the model structure was helpful to reduce the seismic response of the structure.

关 键 词：博物馆 文物陈列系统 悬吊结构 减震性能 振动台试验 

分 类 号：TU352.1[建筑科学—结构工程]