Parametric study of wind-induced vibration control of tall buildings using TMD and TLCD systems

Abstract

The effectiveness of tuned mass and liquid column dampers (TMD and TLCD systems) in reducing the along-wind and crosswind vibrations of tall buildings is parametrically investigated. A numerical example of a tall building is presented and the structure is modeled as a multi-degrees-of-freedom vertical cantilever beam with beam elements and the masses lumped at the nodes. The responses of the structure are determined using frequency-domain analysis and random vibration theory. The study is carried out parametrically and the effects of various parameters such as basic wind speed, damper mass, and the geometric characteristics of the TLCD system are discussed. The results indicate that both TMD and TLCD systems effectively reduce structural vibrations especially acceleration for a wide range of basic wind speeds. The performance of the TLCD system was highly dependent on the ratio of horizontal to total length of the liquid column, and with increasing the horizontal length, the control efficiency of the TLCD became closer to the that of the TMD. Although the control efficiency of TMD is relatively higher than that of the TLCD, however, higher safety, lower installation and maintenance cost and multi usages of TLCD make it more appropriate for practical applications.