带钢板橡胶减震垫减振台性能的实验研究

Experimental Study of Property for Isolation Table with Steel-Rubber Bearing

通过人工制震对带有钢板叠层橡胶减震垫的减振台进行振动实验研究 ,用强震观测仪在 3个方向上测得其振动加速度时程值 ;用D’Alembert理论建立了 1质点计算模型 ,从而计算出带有钢板叠层橡胶减震垫减振台的各个特征参数 ,即减振台在 3个方向上的临界阻尼比和刚度 ,为进一步研究减振台的非线性振动及减震垫的减震性能提供了依据·对参数计算结果进行分析 ,减振台双柱在水平两个方向上刚度的大小 ,并不是其尺寸比的 4倍 ,原因与柱下剪力墙的刚度也折算到柱的刚度中有关 ,故实际测试结果与理论计算的结果并不矛盾·

A vibration experiment on isolation table with laminated steel rubber bearing was done using manual seismic, and the motion acceleration data in time history of isolation table were observed in three directions with strong motion earthquake instruments. A single particle computational model was established in D'Alembert theory. Various characteristic parameters of isolation table,such as critical damping and stiffness,were calculated by using the model. These results lay the foundation for the farther research about the earthquake non linear vibration and damping property of isolation bearing of isolation table. In the calculated results, the stiffness of the columns in level directions is not four times according as the dimension of the columns. The reason is that the stiffness of the shear wall under the columns is converted to the stiffness of the columns.