Combined Tuned Damperbased Windinduced Vibration Control for Super Tall Buildings

Abstract:

To fully utilize the high efficiency of the tuned mass damper (TMD) and the economic advantage of the tuned liquid column damper (TLCD), a combined tuned damper (CTD) was proposed, and the windinduced vibration mitigation effects of super tall buildings with such a combined tuned damper, were investigated. A kinematic equation was derived, which verified the feasibility of CTD theoretically. The collaborative loss coefficient was proposed to evaluate the performance loss due to the direct connection of TMD and TLCD to the structure of CTD. A comparative study was made of the vibration control efficiency of CTD with those of TMD and TLCD. The results show that the CTD with different parameters performs differently in vibration control and leads to different collaborative loss coefficients. The maximum collaborative loss coefficient can be up to 35%. With the same parameters, the vibration control of CTD is between those of TLCD and TMD, which makes CTD a competitive vibration control option.

Key words:super tall buildings; combined tuned damper; windinduced vibration control; collaborative loss coefficient; tuned mass damper (TMD); tuned liquid column damper (TLCD)