建筑结构最优阻尼及最优配置研究

利用阻尼来抗震是建筑物最简单的抗震方法,当在阻尼数目少于楼层数时,为使所布置的阻尼达到最优的抗震效果,本文开发了两种最优阻尼配置方法。第一种方法是根据临界激励法确定计算所有可能布置位置中的临界阻尼,选择最小的临界阻尼位置作为最优配置。第二种方法则是根据给定阻尼,计算最优控制效果以确定最优阻尼配置。然后根据实代码遗传算法,在结构抗震效果基本保证的前提下,寻找最优阻尼以降低结构总的阻尼增量。最后给出了一个计算实例。

Optimal damper and collocations of Building Structures

Mounting damper is the simplest anti-vibration way for building structures. Two optimal collocation methods are developed to acquire a better anti-vibration effect when the damper number is less than the floor number. The first method is based on the critical excitation, and the smallest critical damper among all placements is chosen as the optimal placement. The second method is based on a given damper, and the optimal allocation can be acquired by the comparison of control effects. Under the premise that the structural anti-vibration effect can be assured, the real coded genetic algorithms are employed to find a lower damper increment. A numerical example is presented to confirm the feasibility.