地震力作用下影响巨子型有控结构的动力参数研究

附加柱刚度与附加阻尼为影响巨子型有控结构抗震性能的两个重要参数。本文基于随机振动理论探讨水平地震作用下附加柱刚度及附加阻尼对巨、子结构动态特性的影响,分析附加阻尼与附加柱间的制约关系,并对比研究传统巨型框架结构、巨子型有控结构安装流体阻尼器前后的响应功率谱变化。结果表明:巨子型有控结构具有极好的抗震性能,安装合理的附加阻尼后,其抗震能力得到进一步提高;附加柱刚度变化不但影响巨、子结构动力响应,而且会导致最优附加阻尼区间迁移。因此,巨子型有控结构具有广阔的发展空间,实际设计中应充分考虑附加柱与附加阻尼的相互影响。

Study on parameters of mega-subcontrolled frames

Additional pillar stiffness and additional damping are two important dynamical parameters in the mega-subcontrolled frame.Based on the random vibration theory,the effects of additional pillar stiffness and additional damping on the dynamical characteristics of the mega-structure and sub-structure subjected to horizontal ground motion are examined.Conditional relations between the two parameters are analyzed.And the response powers among the traditional mega-frame,the mega-subcontrolled frame without additional damping and the mega-subcontrolled frame with additional damping are investigated comparatively.Results show that the mega-subcontrolled frame with reasonable additional damping possess transcendental earthquake-resistant ability,and that the additional pillar stiffness can not only affect the dynamical responses of the mega-structure and the sub-structures but also make the optimum additional damping change.Therefore,the mega-subcontrolled frame has wide space to develop,and the two parameters should be considered together in actual design.