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Performance assessment of the KDamper as a seismic Absorption Base
Structural Control and Health Monitoring ( IF 4.6 ) Pub Date : 2020-01-29 , DOI: 10.1002/stc.2482
Konstantinos A. Kapasakalis 1 , Ioannis A. Antoniadis 2 , Evangelos J. Sapountzakis 1
Affiliation  

The KDamper is a novel passive vibration absorption concept based essentially on the optimal combination of appropriate stiffness elements, one of which has a negative value. In this paper, the implementation of the KDamper as a seismic Absorption Base (KDAB) is considered. The performance of the KDAB is assessed in three characteristic test cases, namely, a rigid body and two flexible buildings with fundamental periods of 0.5 and 1.0 s, respectively. In all three cases, the structures are excited by real and artificial accelerograms. The performance of the KDAB is compared not only with the original structure but also with the cases of conventional and highly damped base isolation systems, as well as with the case of a tuned mass damper inerter. Alternative options for the selection of the KDamper nominal frequency are considered, leading to two cases. In the first one, the nominal KDamper frequency is selected equal to the low frequency of a conventional base isolation system, resulting in a drastic improvement of the overall structural performance (i.e., superstructure accelerations and base drifts). In the second one, the KDAB is implemented with a much higher nominal frequency, leading to a drastic reduction of the relative base displacement, in the order of few centimeters, combined with acceptable structural performance. As a consequence, the KDamper can be implemented as a supplement of a conventional base isolation system or, alternatively, as a “stiff absorption base,” overcoming the disadvantages of seismic isolation approaches, leading towards new seismic protection technologies.

中文翻译:

KDamper作为减震基础的性能评估

KDamper是一种新颖的被动吸振概念,其主要基于适当刚度元素的最佳组合,其中之一具有负值。在本文中,考虑将KDamper用作地震吸收库(KDAB)。在三个特征测试案例中评估了KDAB的性能,即一个刚性主体和两个基本周期分别为0.5和1.0 s的柔性建筑物。在所有三种情况下,结构都通过真实的和人工的加速度图激发。KDAB的性能不仅与原始结构进行了比较,而且还与常规和高阻尼基础隔振系统的情况以及调谐质量阻尼器惰轮的情况进行了比较。考虑了选择KDamper标称频率的替代选项,导致两种情况。在第一个中,标称KDamper频率被选择为等于常规基础隔离系统的低频,从而导致整体结构性能(即,上层建筑的加速度和基础位移)的显着改善。在第二种方法中,以较高的标称频率实现KDAB,从而导致相对基础位移的大幅度降低(几厘米),并具有可接受的结构性能。因此,KDamper可以作为常规基础隔振系统的补充,或者作为“刚性吸收基础”来实现,从而克服了地震隔离方法的缺点,从而带来了新的地震防护技术。选择的标称KDamper频率等于常规基础隔离系统的低频,从而导致整体结构性能(即,上部结构加速度和基础位移)大大改善。在第二种方法中,以较高的标称频率实现KDAB,从而导致相对基础位移的大幅度降低(几厘米),并具有可接受的结构性能。因此,KDamper可以作为常规基础隔离系统的补充,或者作为“刚性吸收基础”来实施,克服了地震隔离方法的弊端,从而带来了新的地震防护技术。选择的标称KDamper频率等于常规基础隔离系统的低频,从而导致整体结构性能(即,上部结构加速度和基础位移)大大改善。在第二种方法中,以较高的标称频率实现KDAB,从而导致相对基础位移的大幅度降低(几厘米),并具有可接受的结构性能。因此,KDamper可以作为常规基础隔离系统的补充,或者作为“刚性吸收基础”来实施,克服了地震隔离方法的弊端,从而带来了新的地震防护技术。例如,上层建筑的加速度和基础位移)。在第二种方法中,以较高的标称频率实现KDAB,从而导致相对基础位移的大幅度降低(几厘米),并具有可接受的结构性能。因此,KDamper可以作为常规基础隔离系统的补充,或者作为“刚性吸收基础”来实施,克服了地震隔离方法的弊端,从而带来了新的地震防护技术。例如,上层建筑的加速度和基础位移)。在第二种方法中,以较高的标称频率实现KDAB,从而导致相对基础位移的大幅度降低(几厘米),并具有可接受的结构性能。因此,KDamper可以作为常规基础隔离系统的补充,或者作为“刚性吸收基础”来实施,克服了地震隔离方法的弊端,从而带来了新的地震防护技术。
更新日期:2020-01-29
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