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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。
Shaking table test was carried out on the display system of the suspended structure museum artifacts, and the effects of the El Centro wave, the Taft wave and the Lanzhou wave on the structure of the suspension structure, such as the natural frequency of the structure, the center of gravity of the cultural relics display system, the acceleration response and the dynamic amplification coefficient, Influence of System Seismic Response. The experimental results show that the seismic response of the cultural relics display system depends not only on the input intensity but also on the spectral characteristics of the seismic wave and the natural vibration characteristics of the structure. When the intensity of the local seismic wave is small (the peak acceleration is less than 0.20 g), the damping effect of the suspension system is not obvious and the seismic response tends to increase. The decrease of the center of gravity of the model structure can effectively reduce the seismic response of the cultural relic. When the intensity of the local seismic wave is large (peak acceleration is not less than 0.40 g), the seismic response of the cultural relic increases correspondingly, the shaking aggravates and the phenomena of displacement, tilt, rotation and dumping appear. Compared with the non-shock absorbing structure, the suspension structure Showing a good damping performance; reduce the center of gravity of the model structure helps to reduce the seismic response of the structure.