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以3层设置黏滞阻尼墙的钢框架结构为研究对象,对其进行3条地震波在不同水准下的振动台试验。通过对设置与不设置黏滞阻尼墙的两种结构动力特性和动力响应对比,分析了黏滞阻尼墙的减震效果和耗能特征及其变化规律。研究结果表明,黏滞阻尼墙是一种同时提供附加刚度和附加阻尼的被动消能减震装置,其在提供附加阻尼和附加刚度的同时可以对结构位移起到非常显著的控制作用,并且随着输入地震波峰值加速度的增大,该附加刚度逐渐减小,而附加阻尼则逐渐增大。此外,有限元分析结果与振动台试验结果的吻合度随响应对象和激励工况的不同而变化,说明了传统Maxwell模型用于模拟黏滞阻尼墙在动态力学特性方面的局限性。
Taking the steel frame structure with three layers of viscous damping wall as the research object, three seismic waves were tested under different levels of shaking table test. By comparing the dynamic characteristics and dynamic response of two kinds of structures with and without viscous damping wall, the damping effect, energy dissipation characteristics and variation of viscous damping wall are analyzed. The results show that the viscous damping wall is a passive energy dissipation device that provides both additional stiffness and additional damping. It provides significant damping of structural displacement while providing additional damping and additional stiffness, With the increase of the peak acceleration of the input seismic wave, the additional stiffness gradually decreases while the additional damping gradually increases. In addition, the goodness of fit between the results of finite element analysis and the results of shaking table test varies with the response object and excitation condition, which illustrates the limitations of the traditional Maxwell model in simulating the dynamic mechanical properties of viscous damping wall.