粘滞阻尼墙模型的振动台实验方法

Experimental Method on Viscous Damping Wall by Shaking Table Test

摘要:

粘滞阻尼墙是一种速度相关型的阻尼器，依靠粘滞材料的剪切变形来耗能.对粘滞阻尼器进行实验加载的传统方法是采用高速作动器，对实验设备要求比较高.为了降低实验成本，利用更普及的实验设备——振动台对粘滞阻尼墙模型进行加载，提出了一种新的实验方法：实验模型中完全由粘滞阻尼墙承担水平力，没有设置其它的抗侧构件；水平力由与粘滞阻尼墙内部钢板相连的配重的惯性效应产生；配重的自重通过承重构件传递到滑轮上.同时提出了高精度的数据拟合和分析方法，可以通过计算间接得到粘滞阻尼墙的滞回曲线.设计、制作了一个小比例实验模型，通过振动台加载，取得了很好实验效果，证明了所提实验方法的正确性.最后通过理论推导，针对利用振动台加载的实验设计提出了建议方法.

Abstract:

Viscous damping wall is a kind of velocity dependent damper, and relies on shear deformation of viscous material to dissipate energy. The traditional experimental method of loading for the viscous damping wall is to adopt highspeed actuator, demand of which is much high. In order to reduce the cost of the experiment, a new experimental method is proposed, that the viscous damping wall is loaded by a shaking table, which is more common. In the experimental model, the horizontal force is totally resisted by the viscous damping wall without additional lateral resisting members; the horizontal force is produced by the inertial effect of a balance weight installed upon the inner steel plate of the viscous damping wall; the selfweight of the balance weight is transferred to complimentary bearing members by rollers. Meanwhile, a datum fitting and processing method of high accuracy is proposed to acquire indirectly the hysteretic curve of the viscous damping wall. A small scaled model was designed, made and tested, showing satisfactory results, validating the accuracy of the proposed experimental method. Finally, design recommendations were given for the proposed experimental method with the derived formulae of dynamics.