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为研究围护墙多功能减震结构的减震特性和减震效果,按1∶3缩比制作围护墙钢框架减震结构模型和非减震结构模型,并进行模拟地震振动台试验,研究不同工况下的模型结构动力特性及随着输入不同加速度峰值的El Centro地震波激励下的加速度反应和位移反应。结果表明:结构的自振频率和振型控制与调谐质量阻尼器的个数有关,减震结构对于控制结构的加速度和位移响应非常有效,顶层的减震幅度最大,并在地震波为4 m/s2时,减震效果最佳。通过减震指标动力放大系数和减震率共同评价减震结构对加速度反应和位移反应的控制,说明减震结构对位移的控制效果更优。
In order to study the damping characteristics and the damping effect of the multi-function damping structure of the retaining wall, the damping structure model and the non-damping structure model of the steel frame surrounding the retaining wall are made according to a 1: 3 reduction ratio, and the shaking table test is simulated. The dynamic characteristics of the model structure under different operating conditions and acceleration and displacement responses under the El Centro seismic excitation with different acceleration accelerations are studied. The results show that the natural frequency and shape control of the structure are related to the number of tuned mass dampers. The damping structure is very effective in controlling the acceleration and displacement of the control structure. The damping amplitude of the top layer is the largest. When the seismic wave is 4 m / s2, the best damping effect. Through the dynamic amplification factor and damping rate of shock absorption index, the control of acceleration response and displacement reaction of shock absorption structure are evaluated, which shows that the damping structure has better control effect on displacement.